创建弹出提示框对象
UIAlertController* alert = [UIAlertController alertControllerWithTitle:@"弹出提示框主标题" message:@"弹出提示框副标题，可不写（ nil ）" preferredStyle:UIAlertControllerStyleAlert];
将创建的弹出提示框对象以动画的方式弹出
[self presentViewController:alert animated:YES completion:nil];
创建自动消失方法，并设置弹出提示框展示时间为1秒
[self performSelector:@selector(dismiss:) withObject:alert afterDelay:1];
//------------------------------------------------------------------------------------
释放提示框方法
-(void)dismiss:(UIAlertController*) alertGet
{
[alertGet dismissViewControllerAnimated:YES completion:nil];
NSLog(@"释放提示框被调用");
}
