视图控制器内的UIButton未响应任何操作

Question

我正在创建一个带有按钮和选择器视图的视图控制器，如下所示，问题是按钮对任何操作都没有响应，即dismissButtonPushed未被称为

    UIViewController* x=[[UIViewController alloc]init];
    UIButton* btn=[[UIButton alloc]init];
    btn.frame = CGRectMake(50,80,250,50);
    [btn setTintColor:[UIColor blueColor]];
    [btn addTarget:self action:@selector(dismissButtonPushed:) forControlEvents:UIControlEventTouchUpInside];
    [btn setEnabled:true];
    [btn setTitle:@"Dismiss" forState:UIControlStateNormal];
    [x.view setBounds:CGRectMake(0,-250, 350,350)];
    [x.view addSubview:btn];
    [x.view addSubview:self.productfamilyPikerview];
    x.modalPresentationStyle=UIModalPresentationOverCurrentContext;
    [self.searchButton setHidden:true];
    [self presentViewController:x animated:YES completion:nil];

这里还有dismissButtonPushed方法：

-(void)dismissButtonPushed:(id)sender{
}

Answer 1

更改此行

[btn addTarget:x action:@selector(dismissButtonPushed:) forControlEvents:UIControlEventTouchUpInside];

至

[btn addTarget:self action:@selector(dismissButtonPushed:) forControlEvents:UIControlEventTouchUpInside];

希望它能有所帮助！