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2014年12月16日 星期二

Objective-C Math functions

常常忘記objective-c的數學運算式
特地寫一下記錄

• pow(x,y) : x 的 y 次方
• sqrt(x) : x的平方根
• floor(x) : 小於 x 的最大整數
• ceil(x) : 大於 x 的最小整數
• exp(x) : e 的 x 次方
• log(x) : 以 e 為底 x 的對數值
• log10(x) : 以10為底 x 的對數值
• abs(x) : 整數 x 的絕對值
• fabs(x) : 浮點數 x 的絕對值
• srand(x), rand() : 產生亂數

參考1
參考2
參考3

2014年10月20日 星期一

轉帖Xcode6中怎么添加空工程模板


把Empty Application.xctemplate 拷贝到
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/Xcode/Templates/Project Templates/iOS/Application下就可以了
但是要保证你的Xcode的路径是正确地。退出Xcode 再打开就可以了
Empty Application.xctemplate

2014年7月20日 星期日

轉帖:iOS7下UINavigationController Push / Pop ViewController 动画过程中出现视图叠加重影问题的解决

轉帖link
前两天,遇到一个莫名其妙的问题。
使用UINavigationController push一个新的controller的时候, 动画过程中rootController的view上的元素总是会有一部分叠加在新的controller的view上, 造成视觉混乱。

后来发现,由于创建controller 时,view默认的background color为透明色。(主要是当所有的view背景均显示为白色的时候,很难去发现这个背景色是透明的) 只要讲这个背景色改成非透明色即可!

在这里留个记号!

2014年6月26日 星期四

Facebook Creat App Status for iOS

今天需要測試一下Feacbook的iOS SDK的Login功能
沒想到facebook又大改版所以一些步驟也都忘光光了
一開始都照著facebook文件一步一步去做
後來遇到怎樣都不行讓facebook的App激活起來
如圖
後來問一下朋友原來是在Status & Review這部分
Do you want to make this app and all its live features available to the general public
選項要為YES
如圖
修改為這樣

這樣App就正式搞定了

2014年6月10日 星期二

UIDocumentInteractionController 快速分享到其他應用程式

sample code #import @interface ViewController : UIViewController { IBOutlet UIImageView *img; BOOL preview; UIDocumentInteractionController *documentInteractionController; } @end - (IBAction)shareDocument:(id)sender { NSURL *URL = [[NSBundle mainBundle] URLForResource:@"test" withExtension:@"png"]; if (URL) { // Initialize Document Interaction Controller documentInteractionController = [UIDocumentInteractionController interactionControllerWithURL:URL]; if (preview) { [documentInteractionController setDelegate:self]; [documentInteractionController presentPreviewAnimated:YES]; } else { [documentInteractionController presentOpenInMenuFromRect:[sender frame] inView:self.view animated:YES]; } } } #pragma mark - #pragma mark - UIDocumentInteractionControllerDelegate - (UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)controller { return self; } - (UIView *)documentInteractionControllerViewForPreview:(UIDocumentInteractionController *)controller { return self.view; } - (CGRect)documentInteractionControllerRectForPreview:(UIDocumentInteractionController *)controller { return self.view.frame; }

2014年4月11日 星期五

iOS7 取得麥克風權限

Add framework
#import AVFoundation/AVFoundation.h //取得錄音權限 - (BOOL)canRecord { __block BOOL bCanRecord = YES; if ([[[UIDevice currentDevice] systemVersion] compare:@"7.0"] != NSOrderedAscending) { AVAudioSession *audioSession = [AVAudioSession sharedInstance]; if ([audioSession respondsToSelector:@selector(requestRecordPermission:)]) { [audioSession performSelector:@selector(requestRecordPermission:) withObject:^(BOOL granted) { if (granted) { bCanRecord = YES; } else { bCanRecord = NO; } }]; } } return bCanRecord; } #pragma mark - Audio Recorder √ /*開始錄音*/ - (void)startToRecord:(id)sender { if (![self canRecord]) { [[[UIAlertView alloc] initWithTitle:nil message:[NSString stringWithFormat:@"%@需要訪問你的麥克風。\n請起用麥克風-設定/隱私/麥克風", [TIXAAppMonitor sharedMonitor].appName] delegate:nil cancelButtonTitle:@"好" otherButtonTitles:nil] show]; return; } }

麥克風檢測庫SCListener

SCListener

2014年4月9日 星期三

nil/Nil/NULL/NSNull

标志                值                    含义
NULL       (void *)0            C指针的字面零值
nil               (id)0                    Objective-C对象的字面零值
Nil               (Class)0            Objective-C类的字面零值
NSNull       [NSNull null]    用来表示零值的单独的对象

2014年3月24日 星期一

30多个iOS常用动画,带详细注释

// // CoreAnimationEffect.h // CoreAnimationEffect // // Created by VincentXue on 13-1-19. // Copyright (c) 2013年 VincentXue. All rights reserved. // #import /** ! 导入QuartzCore.framework * * Example: * * Step.1 * * #import "CoreAnimationEffect.h" * * Step.2 * * [CoreAnimationEffect animationMoveLeft:your view]; * */ @interface CoreAnimationEffect : NSObject #pragma mark - Custom Animation /** * @brief 快速构建一个你自定义的动画,有以下参数供你设置. * * @note 调用系统预置Type需要在调用类引入下句 * * #import * * @param type 动画过渡类型 * @param subType 动画过渡方向(子类型) * @param duration 动画持续时间 * @param timingFunction 动画定时函数属性 * @param theView 需要添加动画的view. * * */ + (void)showAnimationType:(NSString *)type withSubType:(NSString *)subType duration:(CFTimeInterval)duration timingFunction:(NSString *)timingFunction view:(UIView *)theView; #pragma mark - Preset Animation /** * 下面是一些常用的动画效果 */ // reveal + (void)animationRevealFromBottom:(UIView *)view; + (void)animationRevealFromTop:(UIView *)view; + (void)animationRevealFromLeft:(UIView *)view; + (void)animationRevealFromRight:(UIView *)view; // 渐隐渐消 + (void)animationEaseIn:(UIView *)view; + (void)animationEaseOut:(UIView *)view; // 翻转 + (void)animationFlipFromLeft:(UIView *)view; + (void)animationFlipFromRigh:(UIView *)view; // 翻页 + (void)animationCurlUp:(UIView *)view; + (void)animationCurlDown:(UIView *)view; // push + (void)animationPushUp:(UIView *)view; + (void)animationPushDown:(UIView *)view; + (void)animationPushLeft:(UIView *)view; + (void)animationPushRight:(UIView *)view; // move + (void)animationMoveUp:(UIView *)view duration:(CFTimeInterval)duration; + (void)animationMoveDown:(UIView *)view duration:(CFTimeInterval)duration; + (void)animationMoveLeft:(UIView *)view; + (void)animationMoveRight:(UIView *)view; // 旋转缩放 // 各种旋转缩放效果 + (void)animationRotateAndScaleEffects:(UIView *)view; // 旋转同时缩小放大效果 + (void)animationRotateAndScaleDownUp:(UIView *)view; #pragma mark - Private API /** * 下面动画里用到的某些属性在当前API里是不合法的,但是也可以用. */ + (void)animationFlipFromTop:(UIView *)view; + (void)animationFlipFromBottom:(UIView *)view; + (void)animationCubeFromLeft:(UIView *)view; + (void)animationCubeFromRight:(UIView *)view; + (void)animationCubeFromTop:(UIView *)view; + (void)animationCubeFromBottom:(UIView *)view; + (void)animationSuckEffect:(UIView *)view; + (void)animationRippleEffect:(UIView *)view; + (void)animationCameraOpen:(UIView *)view; + (void)animationCameraClose:(UIView *)view; @end // // CoreAnimationEffect.m // CoreAnimationEffect // // Created by VincentXue on 13-1-19. // Copyright (c) 2013年 VincentXue. All rights reserved. // #import "CoreAnimationEffect.h" #import @implementation CoreAnimationEffect /** * 首先推荐一个不错的网站. http://www.raywenderlich.com */ #pragma mark - Custom Animation + (void)showAnimationType:(NSString *)type withSubType:(NSString *)subType duration:(CFTimeInterval)duration timingFunction:(NSString *)timingFunction view:(UIView *)theView { /** CATransition * * @see http://www.dreamingwish.com/dream-2012/the-concept-of-coreanimation-programming-guide.html * @see http://geeklu.com/2012/09/animation-in-ios/ * * CATransition 常用设置及属性注解如下: */ CATransition *animation = [CATransition animation]; /** delegate * * 动画的代理,如果你想在动画开始和结束的时候做一些事,可以设置此属性,它会自动回调两个代理方法. * * @see CAAnimationDelegate (按下command键点击) */ animation.delegate = self; /** duration * * 动画持续时间 */ animation.duration = duration; /** timingFunction * * 用于变化起点和终点之间的插值计算,形象点说它决定了动画运行的节奏,比如是均匀变化(相同时间变化量相同)还是 * 先快后慢,先慢后快还是先慢再快再慢. * * 动画的开始与结束的快慢,有五个预置分别为(下同): * kCAMediaTimingFunctionLinear 线性,即匀速 * kCAMediaTimingFunctionEaseIn 先慢后快 * kCAMediaTimingFunctionEaseOut 先快后慢 * kCAMediaTimingFunctionEaseInEaseOut 先慢后快再慢 * kCAMediaTimingFunctionDefault 实际效果是动画中间比较快. */ /** timingFunction * * 当上面的预置不能满足你的需求的时候,你可以使用下面的两个方法来自定义你的timingFunction * 具体参见下面的URL * * @see http://developer.apple.com/library/ios/#documentation/Cocoa/Reference/CAMediaTimingFunction_class/Introduction/Introduction.html * * + (id)functionWithControlPoints:(float)c1x :(float)c1y :(float)c2x :(float)c2y; * * - (id)initWithControlPoints:(float)c1x :(float)c1y :(float)c2x :(float)c2y; */ animation.timingFunction = [CAMediaTimingFunction functionWithName:timingFunction]; /** fillMode * * 决定当前对象过了非active时间段的行为,比如动画开始之前,动画结束之后. * 预置为: * kCAFillModeRemoved 默认,当动画开始前和动画结束后,动画对layer都没有影响,动画结束后,layer会恢复到之前的状态 * kCAFillModeForwards 当动画结束后,layer会一直保持着动画最后的状态 * kCAFillModeBackwards 和kCAFillModeForwards相对,具体参考上面的URL * kCAFillModeBoth kCAFillModeForwards和kCAFillModeBackwards在一起的效果 */ animation.fillMode = kCAFillModeForwards; /** removedOnCompletion * * 这个属性默认为YES.一般情况下,不需要设置这个属性. * * 但如果是CAAnimation动画,并且需要设置 fillMode 属性,那么需要将 removedOnCompletion 设置为NO,否则 * fillMode无效 */ // animation.removedOnCompletion = NO; /** type * * 各种动画效果 其中除了'fade', `moveIn', `push' , `reveal' ,其他属于似有的API(我是这么认为的,可以点进去看下注释). * ↑↑↑上面四个可以分别使用'kCATransitionFade', 'kCATransitionMoveIn', 'kCATransitionPush', 'kCATransitionReveal'来调用. * @"cube" 立方体翻滚效果 * @"moveIn" 新视图移到旧视图上面 * @"reveal" 显露效果(将旧视图移开,显示下面的新视图) * @"fade" 交叉淡化过渡(不支持过渡方向) (默认为此效果) * @"pageCurl" 向上翻一页 * @"pageUnCurl" 向下翻一页 * @"suckEffect" 收缩效果,类似系统最小化窗口时的神奇效果(不支持过渡方向) * @"rippleEffect" 滴水效果,(不支持过渡方向) * @"oglFlip" 上下左右翻转效果 * @"rotate" 旋转效果 * @"push" * @"cameraIrisHollowOpen" 相机镜头打开效果(不支持过渡方向) * @"cameraIrisHollowClose" 相机镜头关上效果(不支持过渡方向) */ /** type * * kCATransitionFade 交叉淡化过渡 * kCATransitionMoveIn 新视图移到旧视图上面 * kCATransitionPush 新视图把旧视图推出去 * kCATransitionReveal 将旧视图移开,显示下面的新视图 */ animation.type = type; /** subtype * * 各种动画方向 * * kCATransitionFromRight; 同字面意思(下同) * kCATransitionFromLeft; * kCATransitionFromTop; * kCATransitionFromBottom; */ /** subtype * * 当type为@"rotate"(旋转)的时候,它也有几个对应的subtype,分别为: * 90cw 逆时针旋转90° * 90ccw 顺时针旋转90° * 180cw 逆时针旋转180° * 180ccw 顺时针旋转180° */ /** * type与subtype的对应关系(必看),如果对应错误,动画不会显现. * * @see http://iphonedevwiki.net/index.php/CATransition */ animation.subtype = subType; /** * 所有核心动画和特效都是基于CAAnimation,而CAAnimation是作用于CALayer的.所以把动画添加到layer上. * forKey 可以是任意字符串. */ [theView.layer addAnimation:animation forKey:nil]; } #pragma mark - Preset Animation + (void)animationRevealFromBottom:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setType:kCATransitionReveal]; [animation setSubtype:kCATransitionFromBottom]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn]]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationRevealFromTop:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setType:kCATransitionReveal]; [animation setSubtype:kCATransitionFromTop]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationRevealFromLeft:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setType:kCATransitionReveal]; [animation setSubtype:kCATransitionFromLeft]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationRevealFromRight:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setType:kCATransitionReveal]; [animation setSubtype:kCATransitionFromRight]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationEaseIn:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setType:kCATransitionFade]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn]]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationEaseOut:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setType:kCATransitionFade]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [view.layer addAnimation:animation forKey:nil]; } /** * UIViewAnimation * * @see http://www.cocoachina.com/bbs/read.php?tid=110168 * * @brief UIView动画应该是最简单便捷创建动画的方式了,详解请猛戳URL. * * @method beginAnimations:context 第一个参数用来作为动画的标识,第二个参数给代理代理传递消息.至于为什么一个使用 * nil而另外一个使用NULL,是因为第一个参数是一个对象指针,而第二个参数是基本数据类型. * @method setAnimationCurve: 设置动画的加速或减速的方式(速度) * @method setAnimationDuration: 动画持续时间 * @method setAnimationTransition:forView:cache: 第一个参数定义动画类型,第二个参数是当前视图对象,第三个参数是是否使用缓冲区 * @method commitAnimations 动画结束 */ + (void)animationFlipFromLeft:(UIView *)view { [UIView beginAnimations:nil context:NULL]; [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; [UIView setAnimationDuration:0.35f]; [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:view cache:NO]; [UIView commitAnimations]; } + (void)animationFlipFromRigh:(UIView *)view { [UIView beginAnimations:nil context:NULL]; [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; [UIView setAnimationDuration:0.35f]; [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:view cache:NO]; [UIView commitAnimations]; } + (void)animationCurlUp:(UIView *)view { [UIView beginAnimations:nil context:NULL]; [UIView setAnimationCurve:UIViewAnimationCurveEaseOut]; [UIView setAnimationDuration:0.35f]; [UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:view cache:NO]; [UIView commitAnimations]; } + (void)animationCurlDown:(UIView *)view { [UIView beginAnimations:nil context:NULL]; [UIView setAnimationCurve:UIViewAnimationCurveEaseIn]; [UIView setAnimationDuration:0.35f]; [UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:view cache:NO]; [UIView commitAnimations]; } + (void)animationPushUp:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [animation setType:kCATransitionPush]; [animation setSubtype:kCATransitionFromTop]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationPushDown:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [animation setType:kCATransitionPush]; [animation setSubtype:kCATransitionFromBottom]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationPushLeft:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [animation setType:kCATransitionPush]; [animation setSubtype:kCATransitionFromLeft]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationPushRight:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [animation setType:kCATransitionPush]; [animation setSubtype:kCATransitionFromRight]; [view.layer addAnimation:animation forKey:nil]; } // presentModalViewController + (void)animationMoveUp:(UIView *)view duration:(CFTimeInterval)duration { CATransition *animation = [CATransition animation]; [animation setDuration:duration]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]]; [animation setType:kCATransitionMoveIn]; [animation setSubtype:kCATransitionFromTop]; [view.layer addAnimation:animation forKey:nil]; } // dissModalViewController + (void)animationMoveDown:(UIView *)view duration:(CFTimeInterval)duration { CATransition *transition = [CATransition animation]; transition.duration =0.4; transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; transition.type = kCATransitionReveal; transition.subtype = kCATransitionFromBottom; [view.layer addAnimation:transition forKey:nil]; } + (void)animationMoveLeft:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [animation setType:kCATransitionMoveIn]; [animation setSubtype:kCATransitionFromLeft]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationMoveRight:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [animation setType:kCATransitionMoveIn]; [animation setSubtype:kCATransitionFromRight]; [view.layer addAnimation:animation forKey:nil]; } +(void)animationRotateAndScaleEffects:(UIView *)view { [UIView animateWithDuration:0.35f animations:^ { /** * @see http://donbe.blog.163.com/blog/static/138048021201061054243442/ * * @param transform 形变属性(结构体),可以利用这个属性去对view做一些翻转或者缩放.详解请猛戳↑URL. * * @method valueWithCATransform3D: 此方法需要一个CATransform3D的结构体.一些非详细的讲解可以看下面的URL * * @see http://blog.csdn.net/liubo0_0/article/details/7452166 * */ view.transform = CGAffineTransformMakeScale(0.001, 0.001); CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform"]; // 向右旋转45°缩小到最小,然后再从小到大推出. animation.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeRotation(M_PI, 0.70, 0.40, 0.80)]; /** * 其他效果: * 从底部向上收缩一半后弹出 * animation.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeRotation(M_PI, 0.0, 1.0, 0.0)]; * * 从底部向上完全收缩后弹出 * animation.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeRotation(M_PI, 1.0, 0.0, 0.0)]; * * 左旋转45°缩小到最小,然后再从小到大推出. * animation.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeRotation(M_PI, 0.50, -0.50, 0.50)]; * * 旋转180°缩小到最小,然后再从小到大推出. * animation.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeRotation(M_PI, 0.1, 0.2, 0.2)]; */ animation.duration = 0.45; animation.repeatCount = 1; [view.layer addAnimation:animation forKey:nil]; } completion:^(BOOL finished) { [UIView animateWithDuration:0.35f animations:^ { view.transform = CGAffineTransformMakeScale(1.0, 1.0); }]; }]; } /** CABasicAnimation * * @see https://developer.apple.com/library/mac/#documentation/cocoa/conceptual/CoreAnimation_guide/Articles/KVCAdditions.html * * @brief 便利构造函数 animationWithKeyPath: KeyPath需要一个字符串类型的参数,实际上是一个 * 键-值编码协议的扩展,参数必须是CALayer的某一项属性,你的代码会对应的去改变该属性的效果 * 具体可以填写什么请参考上面的URL,切勿乱填! * 例如这里填写的是 @"transform.rotation.z" 意思就是围绕z轴旋转,旋转的单位是弧度. * 这个动画的效果是把view旋转到最小,再旋转回来. * 你也可以填写@"opacity" 去修改透明度...以此类推.修改layer的属性,可以用这个类. * * @param toValue 动画结束的值.CABasicAnimation自己只有三个属性(都很重要)(其他属性是继承来的),分别为: * fromValue(开始值), toValue(结束值), byValue(偏移值), ! 这三个属性最多只能同时设置两个; * 他们之间的关系如下: * 如果同时设置了fromValue和toValue,那么动画就会从fromValue过渡到toValue; * 如果同时设置了fromValue和byValue,那么动画就会从fromValue过渡到fromValue + byValue; * 如果同时设置了byValue 和toValue,那么动画就会从toValue - byValue过渡到toValue; * * 如果只设置了fromValue,那么动画就会从fromValue过渡到当前的value; * 如果只设置了toValue ,那么动画就会从当前的value过渡到toValue; * 如果只设置了byValue ,那么动画就会从从当前的value过渡到当前value + byValue. * * 可以这么理解,当你设置了三个中的一个或多个,系统就会根据以上规则使用插值算法计算出一个时间差并 * 同时开启一个Timer.Timer的间隔也就是这个时间差,通过这个Timer去不停地刷新keyPath的值. ! 而实际上,keyPath的值(layer的属性)在动画运行这一过程中,是没有任何变化的,它只是调用了GPU去 * 完成这些显示效果而已. * 在这个动画里,是设置了要旋转到的弧度,根据以上规则,动画将会从它当前的弧度专旋转到我设置的弧度. * * @param duration 动画持续时间 * * @param timingFunction 动画起点和终点之间的插值计算,也就是说它决定了动画运行的节奏,是快还是慢,还是先快后慢... */ /** CAAnimationGroup * * @brief 顾名思义,这是一个动画组,它允许多个动画组合在一起并行显示.比如这里设置了两个动画, * 把他们加在动画组里,一起显示.例如你有几个动画,在动画执行的过程中需要同时修改动画的某些属性, * 这时候就可以使用CAAnimationGroup. * * @param duration 动画持续时间,值得一提的是,如果添加到group里的子动画不设置此属性,group里的duration会统一 * 设置动画(包括子动画)的duration属性;但是如果子动画设置了duration属性,那么group的duration属性 * 的值不应该小于每个子动画中duration属性的值,否则会造成子动画显示不全就停止了动画. * * @param autoreverses 动画完成后自动重新开始,默认为NO. * * @param repeatCount 动画重复次数,默认为0. * * @param animations 动画组(数组类型),把需要同时运行的动画加到这个数组里. * * @note addAnimation:forKey 这个方法的forKey参数是一个字符串,这个字符串可以随意设置. * * @note 如果你需要在动画group执行结束后保存动画效果的话,设置 fillMode 属性,并且把 * removedOnCompletion 设置为NO; */ + (void)animationRotateAndScaleDownUp:(UIView *)view { CABasicAnimation *rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"]; rotationAnimation.toValue = [NSNumber numberWithFloat:(2 * M_PI) * 2]; rotationAnimation.duration = 0.35f; rotationAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"]; scaleAnimation.toValue = [NSNumber numberWithFloat:0.0]; scaleAnimation.duration = 0.35f; scaleAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; CAAnimationGroup *animationGroup = [CAAnimationGroup animation]; animationGroup.duration = 0.35f; animationGroup.autoreverses = YES; animationGroup.repeatCount = 1; animationGroup.animations =[NSArray arrayWithObjects:rotationAnimation, scaleAnimation, nil]; [view.layer addAnimation:animationGroup forKey:@"animationGroup"]; } #pragma mark - Private API + (void)animationFlipFromTop:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [animation setType:@"oglFlip"]; [animation setSubtype:@"fromTop"]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationFlipFromBottom:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [animation setType:@"oglFlip"]; [animation setSubtype:@"fromBottom"]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationCubeFromLeft:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [animation setType:@"cube"]; [animation setSubtype:@"fromLeft"]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationCubeFromRight:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [animation setType:@"cube"]; [animation setSubtype:@"fromRight"]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationCubeFromTop:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [animation setType:@"cube"]; [animation setSubtype:@"fromTop"]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationCubeFromBottom:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [animation setType:@"cube"]; [animation setSubtype:@"fromBottom"]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationSuckEffect:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [animation setType:@"suckEffect"]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationRippleEffect:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [animation setType:@"rippleEffect"]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationCameraOpen:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [animation setType:@"cameraIrisHollowOpen"]; [animation setSubtype:@"fromRight"]; [view.layer addAnimation:animation forKey:nil]; } + (void)animationCameraClose:(UIView *)view { CATransition *animation = [CATransition animation]; [animation setDuration:0.35f]; [animation setFillMode:kCAFillModeForwards]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; [animation setType:@"cameraIrisHollowClose"]; [animation setSubtype:@"fromRight"]; [view.layer addAnimation:animation forKey:nil]; } @end

iOS实现在后台播放音乐

iOS4之后就支持后台播放音频了。只需下面两步就可以实现后台播放音频操作了。
1. 在Info.plist中,添加"Required background modes"键,其值设置是“App plays audio"
2. 在播放器播放音乐的代码所在处,添加如下两段代码(当然,前提是已经添加了AVFoundation框架):
//添加后台播放代码: AVAudioSession *session = [AVAudioSession sharedInstance]; [session setActive:YES error:nil]; [session setCategory:AVAudioSessionCategoryPlayback error:nil]; //以及设置app支持接受远程控制事件代码。设置app支持接受远程控制事件, //其实就是在dock中可以显示应用程序图标,同时点击该图片时,打开app。 //或者锁屏时,双击home键,屏幕上方出现应用程序播放控制按钮。 [[UIApplication sharedApplication] beginReceivingRemoteControlEvents]; //用下列代码播放音乐,测试后台播放 // 创建播放器 AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil]; [url release]; [player prepareToPlay]; [player setVolume:1]; player.numberOfLoops = -1; //设置音乐播放次数 -1为一直循环 [player play]; //播放

把状态栏的文字颜色改成白色

1.在info.plist里面添加字段 key----View controller-based status bar appearance value---NO 在appDelegate里面添加代码: [[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:UIStatusBarAnimationFade]; [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent animated:YES];

几种常见的GCD用法

GCD详细介绍 /**< 自定义queue,默认串行: NULL == DISPATCH_QUEUE_SERIAL*/ /**< label:标签,用于标注queue*/ // dispatch_queue_t queue = dispatch_queue_create("label", NULL); // // dispatch_async(queue, ^{ // NSLog(@"test"); // }); /**< 自定义queue,并行或串行: DISPATCH_QUEUE_CONCURRENT或DISPATCH_QUEUE_SERIAL*/ // dispatch_queue_t serial_queue = dispatch_queue_create("标签", DISPATCH_QUEUE_CONCURRENT); // dispatch_async(serial_queue, ^(){ // sleep(5); // NSLog(@"block_1"); // 尽管为异步调用且延迟3秒,但如果在serial队列中,block_1仍然先于block_2被打印出来 // }); // dispatch_async(serial_queue, ^(){ // NSLog(@"block_2"); // }); /**< 延迟执行*/ /**< (int64_t)(delayInSeconds * NSEC_PER_SEC):转换成毫秒*/ // double delayInSeconds = 5.0; // dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC)); // dispatch_after(popTime, dispatch_get_main_queue(), ^(void){ // NSLog(@"5s delay"); // }); /**< 常用的异步并发执行*/ // dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT , 0), ^{ // sleep(5); // NSLog(@"block_1"); // }); // // dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT , 0), ^{ // NSLog(@"block_2"); // }); /**< 异步并回调主线程,常用ui更新*/ dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT , 0), ^{ dispatch_async(dispatch_get_main_queue(), ^{ NSLog(@"to do with ui"); }); });

截取屏幕中局部图片

-(void)screenShotRect:(CGRect)aRect //arect 想要截图的区域 { UIGraphicsBeginImageContextWithOptions(CGSizeMake(640, 960), YES, 0); [self.view.layer renderInContext:UIGraphicsGetCurrentContext()]; UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); CGImageRef imageRef = viewImage.CGImage; CGRect rect =aRect;//这里可以设置想要截图的区域 CGImageRef imageRefRect =CGImageCreateWithImageInRect(imageRef, rect); UIImage *sendImage = [[UIImage alloc] initWithCGImage:imageRefRect]; NSData *imageViewData = UIImagePNGRepresentation(sendImage); //第一,保存到沙盒 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:@"zone.png"]; NSLog(@"%@", savedImagePath); [imageViewData writeToFile:savedImagePath atomically:YES]; CGImageRelease(imageRefRect); //第二,保存到相册 UIImage *image = [UIImage imageWithData:imageViewData]; UIImageWriteToSavedPhotosAlbum(image, self, nil, nil); }

iOS7 UITableView底線右移問題

在ios7上UITableView底线右移了,我们可以通过添加代码来让它铺满整个屏幕的宽,在使用前要加上判断是否有这个方法,因为只有ios7以上才有。
if ([_tableView respondsToSelector:@selector(setSeparatorInset:)]) { [_tableView setSeparatorInset:UIEdgeInsetsZero]; }

2014年3月6日 星期四

二進制,八進制,十進制,十六進制

因為自己不是資訊本科系畢業所以有些觀念都不太清楚
在今天偶然看到關於這些進制的解說
讓我忽然領悟了
所以寫下來避免自己又忘光光
不多說直接上截圖

我們用十進制的19來做範例,轉成二進制的算法
並且將19除以2,結束的條件是商為0,並借由每次的餘數轉換成二進制數值。


相對的從八進制轉到二進制,利用1除以2,結束的條件是商為0,並借由每次的餘數轉換成二進制數值。
利用7除以2,結束的條件是商為0,並借由每次的餘數轉換成二進制數值。


此圖的文字,高位不足三位補零!應該改為高位不足四位補零!!!!


相對的從十六進制轉到二進制,利用7除以2,結束的條件是商為0,並借由每次的餘數轉換成二進制數值。
利用3除以2,結束的條件是商為0,並借由每次的餘數轉換成二進制數值。


相對的從十六進制轉到二進制,利用7除以2,結束的條件是商為0,並借由每次的餘數轉換成二進制數值。
利用3除以2,結束的條件是商為0,並借由每次的餘數轉換成二進制數值。

2014年3月2日 星期日

<轉帖>Objective-C相关Category的收集

Objective-C相关Category的收集

<轉帖>iOS项目的目录结构和开发流程

iOS项目的目录结构和开发流程

目录结构
AppDelegate
Models
Macro
General
Helpers
Vendors
Sections
Resources
 
一个合理的目录结构首先应该是清晰的,让人一眼看上去就能大概了解目录的职责,且容易应对新的变化。
 
AppDelegate
这个目录下放的是AppDelegate.h(.m)文件,是整个应用的入口文件,所以单独拿出来。
 
Models
这个目录下放一些与数据相关的Model文件,里面大概是这样:
 
Models
    |- BaseModel.h
    |- BaseModel.m
    |- CollectionModel.h
    |- CollectionModel.m
    ...
 Macro
这个目录下放了整个应用会用到的宏定义,里面大概是这样:
Macro
    |- AppMacro.h
    |- NotificationMacro.h
    |- VendorMacro.h
    |- UtilsMacro.h
    ...
 
AppMacro.h 里放app相关的宏定义,如:
// 表情相关
#define EMOTION_CACHE_PATH @"cachedemotions"
#define EMOTION_RECENT_USED @"recentusedemotions"
#define EMOTION_CATEGORIES @"categoryemotions"
#define EMOTION_TOPICS @"emotiontopics"
 
// 收藏相关
#define COLLECT_CACHE_PATH @"collected"
 
// 配图相关
#define WATERFALL_ITEM_HEIGHT_MAX 300
#define WATERFALL_ITEM_WIDTH 146
 
NotificationMacro.h 里放的是通知相关的宏定义。

UtilsMacro.h 里放的是一些方便使用的宏定义,如:
#define UIColorFromRGB(r,g,b) [UIColor \
colorWithRed:r/255.0 \
green:g/255.0 \
blue:b/255.0 alpha:1]
 
#define NSStringFromInt(intValue) [NSString stringWithFormat:@"%d",intValue]
 
VendorMacro.h 里放一些第三方常量,如:
#define UMENG_KEY @"xxxxx"
#define UMENG_CHANNEL_ID @"xxx"
 
如果有新的类型的宏定义,可以再新建一个相关的Macro.h。

General
这个目录放会被重用的Views/Classes和Categories。里面大概是这样:
General
    |- Views
        |- TPKScollView
        |- TPKPullToRefresh
        ...
    |- Classes
        |- TPKBaseViewController
        |- TPKHorizontalView
        ...
    | - Categories
        |- UIViewController+Sizzle
        |- UIImageView+Downloader
        ...
这里的TPK是项目的首字母缩写。
 
Helpers
这个目录放一些助手类,文件名与功能挂钩。里面大概是这样:
Helpers
    |- TPKShareHelper
    |- TPDBHelper
    |- TPKEmotionHelper
    ...
 
助手类的主要作用是帮助Controller瘦身,也可以提供一定程度的复用。

Vendors
这个目录放第三方的类库/SDK,如UMeng、WeiboSDK、WeixinSDK等等。
 
Sections
这个目录下面的文件对应的是app的具体单元,如导航、瀑布流等等。里面大概是这样:
Sections
    |- Menu
    |- Setting
    |- Collection
    ...
 
Resources
这个目录下放的是app会用到的一些资源,主要是图片。

2014年2月27日 星期四

CMMotionManager in the background

首先在TARGETS的Capabilities的Background Modes把Location updates打勾
然後再

- (void)applicationDidEnterBackground:(UIApplication *)application { // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later. // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits. NSLog(@"applicationDidEnterBackground"); UIApplication *app = [UIApplication sharedApplication]; __block UIBackgroundTaskIdentifier bgTask = [app beginBackgroundTaskWithExpirationHandler:^{ dispatch_async(dispatch_get_main_queue(), ^{ if (bgTask != UIBackgroundTaskInvalid) { [app endBackgroundTask:bgTask]; bgTask = UIBackgroundTaskInvalid; } }); }]; dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ // testTimer = [NSTimer scheduledTimerWithTimeInterval:(1.0/60.0) target:self selector:@selector(doSomeTest) userInfo:nil repeats:YES]; testTimer = [NSTimer scheduledTimerWithTimeInterval:(10.0) target:self selector:@selector(doSomeTest) userInfo:nil repeats:YES]; [testTimer fire]; [[NSRunLoop currentRunLoop] addTimer:testTimer forMode:NSRunLoopCommonModes]; [[NSRunLoop currentRunLoop] run]; dispatch_async(dispatch_get_main_queue(), ^{ if (bgTask != UIBackgroundTaskInvalid) { [app endBackgroundTask:bgTask]; bgTask = UIBackgroundTaskInvalid; } }); }); } -(void)doSomeTest{ }

2014年2月4日 星期二

轉帖 The official raywenderlich.com Objective-C style guide

The official raywenderlich.com Objective-C style guide

Singletons

Singleton objects should use a thread-safe pattern for creating their shared instance.
+ (instancetype)sharedInstance { static id sharedInstance = nil; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ sharedInstance = [[self alloc] init]; }); return sharedInstance; }

轉帖google analytics iOS

google-analytics-ios