oc UIAlertController封装
#define SHOWALERT(MESSAGE) \ UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:MESSAGE preferredStyle:UIAlertControllerStyleAlert]; \ UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:nil]; \ [alertController addAction:okAction]; \ UIViewController *vc = [UIApplication sharedApplication].windows[0].rootViewController;\ [vc presentViewController:alertController animated:YES completion:nil];