新建自定义ScrollView 加入代码
- (BOOL)gestureRecognizer:(UIGestureRecognizer*)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer*)otherGestureRecognizer {
if([selfpanBack:gestureRecognizer]) {
returnYES;
}
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
intlocation_X =40;
if(gestureRecognizer ==self.panGestureRecognizer) {
UIPanGestureRecognizer *pan = (UIPanGestureRecognizer *)gestureRecognizer;
CGPointpoint = [pantranslationInView:self];
UIGestureRecognizerStatestate = gestureRecognizer.state;
if (UIGestureRecognizerStateBegan == state ||UIGestureRecognizerStatePossible == state) {
CGPointlocation = [gestureRecognizerlocationInView: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) {
returnYES;
}
}
}
return NO;
}
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer*)gestureRecognizer {
if([selfpanBack:gestureRecognizer]) {
returnNO;
}
return YES;
}
