1.修改响应优先级
UIGestureRecognizer类中有两个方法
//让自身这个手势事件响应优先级低于其它手势事件
//只是在对于比它响应优先级低的手势调用
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldBeRequiredToFailByGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
return YES;
}
//让自身这个手势事件响应优先级高于其它手势事件
//只是在对于比它响应优先级高的手势调用
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRequireFailureOfGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
return YES;
}
还有一种是直接对两个手势
//让gestureTwo响应优先级低于gestureOne
[gestureTwo requireGestureRecognizerToFail:gestureOne];
2.同时响应
//共存 A手势或者B手势 代理方法里shouldRecognizeSimultaneouslyWithGestureRecognizer 有一个是返回YES，就能共存
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
return YES;
}
UIScrollView与侧滑手势冲突解决
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
if ([self panBack:gestureRecognizer]) {
return YES;
}
return NO;
}
//location_X可自己定义,其代表的是滑动返回距左边的有效长度
- (BOOL)panBack:(UIGestureRecognizer *)gestureRecognizer {
//是滑动返回距左边的有效长度
int location_X =40;
if (gestureRecognizer ==self.panGestureRecognizer) {
UIPanGestureRecognizer *pan = (UIPanGestureRecognizer *)gestureRecognizer;
CGPoint point = [pan translationInView:self];
UIGestureRecognizerState state = gestureRecognizer.state;
if (UIGestureRecognizerStateBegan == state ||UIGestureRecognizerStatePossible == state) {
CGPoint location = [gestureRecognizer locationInView:self];
//这是允许每张图片都可实现滑动返回
// int temp1 = location.x;
// int temp2 = KScreenW;
// NSInteger X = temp1 % temp2;
// if (point.x >0 && X < location_X) {
// return YES;
// }
//下面的是只允许在第一张时滑动返回生效
if (point.x > 0 && location.x < location_X && self.contentOffset.x <= 0) {
return YES;
}
}
}
return NO;
}
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
if ([self panBack:gestureRecognizer]) {
return NO;
}
return YES;
}
