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];

Hide and show activity indicator in statusbar

//    show

    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;

//    hide

    [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;