?當主視圖添加了??UITapGestureRecognizer? 點擊方法時，在其上的子視圖也會有手勢響應，需求點擊子視圖不響應點擊方法
UITapGestureRecognizer 添加代理?<UIGestureRecognizerDelegate>
實現(xiàn)代理方法
#pragma mark - UIGestureRecognizerDelegate
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer*)gestureRecognizer {
? ? UITapGestureRecognizer *tap = (UITapGestureRecognizer *)gestureRecognizer;
? ? CGPoint point = [tap locationInView:self];
? ? BOOL isIn = CGRectContainsPoint(self.whiteView.frame,point);
? ? return !isIn;
}
