UI控件提示框

-(void)abb{

    //UI警报控制器

    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"标题" message:@"messagebox" preferredStyle:UIAlertControllerStyleAlert];

    UIAlertAction *action1 = [UIAlertAction actionWithTitle:@"确认" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {

    }];

    UIAlertAction *action2= [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {

    }];

    UIAlertAction *action3= [UIAlertAction actionWithTitle:@"警告" style:UIAlertActionStyleDestructive handler:^(UIAlertAction *action) {

    }];

    //添加

    [alert addAction:action1];

    [alert addAction:action2];

    [alert addAction:action3];

    //    [alert addAction:action3];

    [self presentViewController:alert animated:YES completion:^{

    }];

}