1.將pageContentView的collectionView屬性生成放在.h里面却舀，可以對外調(diào)用
2.手勢判斷滑動到屏幕邊緣時，把pageContentView.collectionView的手勢禁掉黑低。代碼如下
? ? for (UIGestureRecognizer *gesture in self.navigationController.view.gestureRecognizers) {
? ? ? ? if ([gesture isKindOfClass:[UIScreenEdgePanGestureRecognizer class]]){
? ? ? ? ? ? [self.pageContentView.collectionView.panGestureRecognizer requireGestureRecognizerToFail:gesture];
? ? ? ? }
? ? }
