uiresponder

在 iOS 中，一个 UIResponder 对象表示一个可以接收触摸屏上的触摸事件的对象，通俗一点的说，就是表示一个可以接收事件的对象。 iOS 中，所有显示在界面上的对象都是从 UIResponder 直接或间接继承的。 下面是 UIResponder 类的一些定义信息： 触摸事件相关： 方法名称 说明 touchesBegan:withEvent 当用户触摸到屏幕时调用方法 tochesMoved:withEvent 当用户触摸到屏幕并移动时调用此方法 tochesEnded:withEvent 当触摸离开屏幕时调用此方法 tochesCancelled:withEvent 当触摸被取消时调用此方法 运动事件相关： 运动事件是指当用户以特定方式移动设置，如摇摆设置时，设置会产生运动事件，由以下几个方法进行处理： 方法名称 说明 motionBegan:withEvent 运动开始时执行 motionEnded:withEvent 运动结束时执行 motionCancelled:withEvent 运动被取消时执行 响应对象链相关： 方法名称 说明 isFirstResponder 指示对象是否为第一响应者，这里的第一响应者就是当前有焦点的对象，叫法挺奇怪的，第一次看到真还难以理解这个叫法所表达的意思 nextResponder 下一个响应者，在实现中，一般会返回父级对象

Tonight I've been battling with UIResponder. Here's my predicament. If I put in - (BOOL)canBecomeFirstResponder{ return YES; } to my mainViewController then I can get shake events.. - (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event { if (event.type == UIEventSubtypeMotionShake) { //do something } } However, this means that when I call things like mail forms and webviews, the keyboard does not show up. Is there any way I can get both shakes working and keyboard working in modal views? I've tried adding [self resignFirstResponder]; in -viewDidDissapear, which gets called when

Background I'm trying to make a UICollectionViewCell behave like a button (ie, do an animated dim on touch). I had the idea of just filling the cell with a UIButton . The button would then take care of the visual effect of being tapped. But then I would need to pass the touch event on to the parent (the UICollectionViewCell ) so that the button does not just consume the event. That way I could handle it with the collection view's didSelectItemAtPath . The problem below is my attempt to figure out how to pass the event on. My problem I came across this Objective-C answer for passing the touch

I am wanting to know when a user has touched anywhere on the screen of my app. I have looked into using -(UIResponder *)nextResponder but unfortunately this will not work, as I am also reloaded a table automatically, so this gets trigged when that occurs. I have also tried a gesture recognizer, with the following code. But this will only recognise touches on the view. Where as I have many buttons the user will be using to operate the app. I would like to avoid adding a gesture recogniser or code for this in every button and segment control I have on the screen UITapGestureRecognizer *tap = [

I've noticed that touchesEnded don't always get delivered to an SKScene on multi touch. Depending on speed of removing fingers etc, I would permanently miss some of the touchesEnded. touchesCancelled is implemented and I added a custom UIView and put over the left side of the screen - no problems. I made a custom SKView and captured events - again no problem. It's obvious that SKScene doesn't get all the touchesEnded the SKView it's embedded in, but why? (BTW, I'm running the SKScene completely without any nodes) EDIT: Some further investigation reveals I can get SKScene to lose a touch