1,显示应用图标右上角的红色提示 application.applicationIconBadgeNumber = 10;2.修改状态栏的类型在当前控制器下设置- (UIStatusBarStyle)preferredStatusBarStyle{return UIStatusBarStyleLightContent;}3. 在状态栏显示网络提示的圈圈application.networkActivityIndicatorVisible = YES;