hitTest 中的 TouchesForView
我有一个像容器一样使用的简单 UIView。 如果我写这段代码：
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
UIView *hitView = [super hitTest:point withEvent:event];
NSSet *sTouches = [event touchesForView:self];
NSLog(@"Touches %d", [sTouches count] );
return self;
}
不起作用！我想在 TouchBegan() 之前在 hitTest() 消息中获取触摸计数！ 是否可以？
我有这样的层次结构：
UIView
+---> UIScrollView
当触摸我的 UIView （单击）时，容器会移动。当我在 UIView 上双击（两根手指）时，子 UIScrollView 不适用于 Zoom（例如）。 于是我就想到要抓摸数。
如果触摸次数等于 1，UIView 容器上的 hitTest 将返回“self”。 否则，如果触摸次数大于 1 ( == 2)，则 hitTest 返回“scrollview”指针。
换句话说，我想将两个手指事件捕获到 hitTest() 消息/事件中。
I have a simple UIView used like container.
If I write this code:
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
UIView *hitView = [super hitTest:point withEvent:event];
NSSet *sTouches = [event touchesForView:self];
NSLog(@"Touches %d", [sTouches count] );
return self;
}
Doesn't work! I would like get touches count in hitTest() message, before touchesBegan()!
Is it possible?
I have this hierarchy:
UIView
+---> UIScrollView
When touch on my UIView (single tap) the container moves. When I double touch (two finger) on my UIView, the child UIScrollView doesn't work for Zoom (for example).
So I have think to catch touches number.
If touch number is equal to one, hitTest on my UIView container return "self".
Else, if touch number is great to one ( == 2), hitTest return "scrollview" pointer.
In others words, I would like catch two finger event into hitTest() message/event.
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框架使用
hitTest来确定哪个视图被点击，从而确定向哪个视图发送touchesBegan/touchesMoved/touchesEnded/touchesCancelled消息。在调用hitTest时，您无法判断。也许您可以解释一下您想要实现的目标，因为这似乎不是正确的方法。
hitTestis used by the framework to determine which view is being hit, and thus which view to send thetouchesBegan/touchesMoved/touchesEnded/touchesCancelledmessages to. At the pointhitTestis called, you can't tell.Maybe you could explain what you are trying to accomplish, because this doesn't seem like the right way to do it.