#ifndef DOXYGEN_SHOULD_SKIP_THIS

 // Disallow init and don't add to documentation
 - (id)init __attribute__((unavailable("init is not a supported initializer for this class.")));

 #endif

UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"" message:@"设置按钮为红色" delegate:nil cancelButtonTitle:@"我是红色" otherButtonTitles:nil];

[[UIView appearance] setTintColor:[UIColor redColor]];

[alertView show];      

+ (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
  if (buttonIndex == [alertView cancelButtonIndex]) {
      [[UIView appearance] setTintColor:nil];
  }
}