xcode – 从chid UIView访问父视图

因此,根本问题在于您没有正确地分离控制器和视图类.你通常做的是让你想要捕获UIControl的子类的视图(像UIButton这样的东西,但是如果它是一个自定义的UIView子类,那么你可以将它改成UIControl子类,因为UIControl本身是一个UIView的子类),然后在你的控制器中添加如下内容：

- (void)viewDidLoad
{
    [super viewDidLoad];

    // we'll want to know if the view we care about is tapped;
    // we've probably set up an IBOutlet to it but any way of
    // getting to it is fine
    [interestingView
               addTarget:self
               action:@selector(viewTapped:)
               forControlEvents:UIControlEventTouchDown];

     // UIButtons use UIControlEventTouchUpInside rather than
     // touch down if wired up in the interface builder. Pick
     // one based on the sort of interaction you want
}

// so now this is exactly like an IBAction
- (void)viewTapped:(id)sender
{
    self.title = @"My new title";
}

因此,您明确不要将视图投入任何有关其在视图层次结构中的位置或视图控制器打算如何操作的知识.如果它收到用户交互,你只是告诉它给你一个喊叫.