Question

我有一个有很多物体的UIView。我也有像这样的touchesMoved的实现：

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"move");
}

我最近想要滚动视图，所以我只是打开了UIView，并在Interface Builder中将其对象类更改为UIScrollView。但是，现在即使触摸屏幕也不会调用'touchesMoved'方法。

有人可以帮我搞动一下再次移动吗？我不知道我做了什么来打破它！

编辑：我试过跟this guide，但我可能做错了。从阅读其他帖子看起来UIScrollView似乎无法接受触摸事件本身，他们需要被发送到响应链？我将非常感谢任何可以帮助指导我解决这个问题的人...当我意识到UIScrolView杀死我的触摸检测时，我的应用程序就准备提交了！（我刚刚将我的应用程序UIView更改为UIScrollView以允许与iPhone 4兼容）。

Answer 1

我刚刚在您的编辑中看了the guide，我想我可以看到问题所在。有关类似问题，请参阅this answer。

您的UIScrollView子类看起来像这样：

#import "AppScrollView.h"

@implementation AppScrollView

- (id)initWithFrame:(CGRect)frame
{
    return [super initWithFrame:frame];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"AppScrollView touchesEnded:withEvent:");

    // If not dragging, send event to next responder
    if (!self.dragging)
        [[self.nextResponder nextResponder] touchesEnded:touches withEvent:event];
    else
        [super touchesEnded: touches withEvent: event];

}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"AppScrollView touchesMoved:withEvent:");

    [[self.nextResponder nextResponder] touchesMoved:touches withEvent:event];
}

@end

包含AppScrollView对象的类应该采用UIScrollViewDelegate协议并实现这些方法：

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"SomeClass touchesMoved:withEvent:");
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"SomeClass touchesEnded:withEvent:");
}

然后记录的输出将如下所示：

2013-06-11 10:45:21.625 Test[54090:c07] AppScrollView touchesMoved:withEvent:
2013-06-11 10:45:21.625 Test[54090:c07] SomeClass touchesMoved:withEvent:
2013-06-11 10:45:21.642 Test[54090:c07] AppScrollView touchesMoved:withEvent:
2013-06-11 10:45:21.642 Test[54090:c07] SomeClass touchesMoved:withEvent:
2013-06-11 10:45:21.655 Test[54090:c07] AppScrollView touchesEnded:withEvent:
2013-06-11 10:45:21.656 Test[54090:c07] SomeClass touchesEnded:withEvent:

将UIView更改为UIScrollView后，touchesMoved不再触发？

1 个答案: