我有包含VC的uipageviewcontroller.与任何pageviewcontroller一样,您可以向左滑动,向右滑动以更改VC.每次动画完成后,我都会添加gestureRecognizer.我的问题是如何检查视图是否有特定的识别器？我需要这样的代码：
- if check view has specific recognizer == false {
- add recognizer
- }else{
- just skip.
- }
我这样做是因为我有侧边栏.当Sidebarmenu出现时,我想为当前索引pagecontentviewcontroller添加手势.所以,我的代码工作正常,我只是不想每次动画结束时添加手势.
我正在添加代码.问题是我的手势是在其他类(非当前)中创建的.首先,我创建了我保持手势的类实例：
- let transtionManger = TransitionManger()
添加此类名为exitPanGesture的var之后：
- pageContentViewController.view.addGestureRecognizer(transtionManger.exitPanGesture3)
解决方法
那是你在找什么？请参阅评论作为解释：
- // If any gesture recogniser is added to the view (change view to any view you want to test)
- if let recognizers = view.gestureRecognizers {
- for gr in recognizers {
- // This check for UIPanGestureRecognizer but you can check for the one you need
- if let gRecognizer = gr as? UIPanGestureRecognizer {
- println("Gesture recognizer found")
- }
- }
- }
