iphone - 如何让 super View 拦截按钮触摸事件？

Question

假设我有这段代码:

#import <UIKit/UIKit.h>

@interface MyView : UIView
@end
@implementation MyView

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    // How can I get this to show up even when the button is touched?
    NSLog(@"%@", [touches anyObject]);
}

@end

@interface TestViewAppDelegate : NSObject <UIApplicationDelegate>
{
    UIWindow *window;
}

@end

@implementation TestViewAppDelegate

- (void)applicationDidFinishLaunching:(UIApplication *)application
{
    window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    MyView *view = [[MyView alloc] initWithFrame:[window frame]];
    [view setBackgroundColor:[UIColor whiteColor]];

    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [button setTitle:@"Hiya!" forState:UIControlStateNormal];
    [button setFrame:CGRectMake(100.0, 100.0, 200.0, 200.0)];
    [view addSubview:button];

    [window addSubview:view];
    [window makeKeyAndVisible];
}


- (void)dealloc
{
    [window release];
    [super dealloc];
}

@end

有什么方法可以拦截发送到按钮的触摸事件吗？我最终想做的是制作一个 UIView 子类，当它检测到滑动时，它将告诉它的 View Controller (或委托(delegate)，无论哪个)，以便它可以将下一个 View Controller “推”到堆栈上(类似于 iPhone 主屏幕).我认为这是第一步，但如果我处理不当，我愿意接受建议。

Answer 1

我有兴趣查看其他解决方案，但我知道最简单的方法是重写这两个 UIView 方法中的任何一个:

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event;
- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event;

调用这些方法以确定触摸是否在 View 或其任何 subview 的边界内，因此这是拦截触摸然后将其传递的好时机。随心所欲，然后

return [super hitTest:point withEvent:event];

或

return [super pointInside:point withEvent:event];