UI控件（UIAlertController）

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    UIButton *_button = [UIButton buttonWithType:UIButtonTypeRoundedRect];

    [_button setTitle:@"按钮" forState:UIControlStateNormal];

    _button.frame = CGRectMake(, , , );

    [self.view addSubview:_button];

    [_button addTarget:self action:@selector(doClick) forControlEvents:UIControlEventTouchDown];

}

-(void)doClick{

    //  UIAlertControllerStyleAlert 替代 UIAlertView

    //  UIAlertControllerStyleActionSheet 替代 UIActionSheet

    //  UIAlertionSheet是标准的确认－取消选择框，要求至少要两个按钮

    UIAlertController *_alertcontroller = [UIAlertController alertControllerWithTitle:@"标题" message:@"提示信息" preferredStyle:UIAlertControllerStyleAlert];

    // 蓝色加粗

    UIAlertAction *action1 = [UIAlertAction actionWithTitle:@"cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {

        NSLog(@"cancel");

    }];

    // 蓝色

    UIAlertAction *action2 = [UIAlertAction actionWithTitle:@"default" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

        NSLog(@"default");

    }];

    // 红色

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

        NSLog(@"Destructive");

    }];

    [_alertcontroller addAction:action1];

    [_alertcontroller addAction:action2];

    [_alertcontroller addAction:action3];

    [self presentViewController:_alertcontroller animated:YES completion:nil];

}

@end