UI控件（UIAlertController）

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    UIButton *_button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [_button setTitle:@"按钮" forState:UIControlStateNormal];
    _button.frame = CGRectMake(10, 20, 50, 20);
    
    [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