iphone6和6plus模拟器键盘不弹出问题

在xcode6中， 模拟器中的键盘和电脑的键盘可以进行绑定or解除绑定，打开模拟器，在最上面的菜单栏中，选择hardware，然后选择keyboards，有三个选项， 依次都勾选就行了。(注意：第三个选项在点击之后，实际已勾上了，但显示未勾上，但实际已经奏效了，这可能是xcode6的一个显示上的bug)

NSLog NSData Length to bytes

NSLog(@"File size is : %.2f MB",(CGFloat)myData.length/1024.0f/1024.0f);

Or for OS X 10.8+ and iOS 6+

NSLog(@"%@",[NSByteCountFormatter stringFromByteCount:myData.length countStyle:NSByteCountFormatterCountStyleFile]);

Xcode 6.3 not displaying memory report

I have resolved disabling Memory Guard diagnostic in the Scheme. From Xcode: Menu Product -> Scheme -> Edit Scheme... -> Diagnostic Tab -> uncheck all Guard options

If still doesn't work, try to disable (if enabled) the "Enable Zombie Object" checkbox

solve

Xcode 6.3: Crash while archiving a project

解決辦法

Reachability

常常出現這個錯誤
+ (Reachability*) reachabilityWithAddress: (const struct sockaddr_in*) hostAddress;
*declaration of 'struct sockaddr_in*' will not be visible outside of this function*
看了很討厭後來再找到解決方法
解答在這
import netinet/in.h
import <>打不上去所以請自己<>

UILabel and UITextView

最近遇到一個問題
字串相同字型大小相同
在UILabel跟UITextView呈現的size不一樣
後來在這邊找到了解答


textView.textContainer.lineFragmentPadding = 0; textView.textContainerInset = UIEdgeInsetsZero; NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init]; paragraphStyle.lineSpacing = -0.38; NSDictionary *attrsDictionary = @{ NSFontAttributeName: [UIFont fontWithName:@"HelveticaNeue" size:13.0f], NSParagraphStyleAttributeName: paragraphStyle}; textView.attributedText = [[NSAttributedString alloc] initWithString:textView.text attributes:attrsDictionary];

App installation failed Could not inspect the application package

參考解決辦法