给UIScrollView写一个延展
.h文件实现：
@interface UIScrollView (NSFoundation)
@end
.m文件实现
@implementation UIScrollView (ScrollTouch)
//重写touchesBegin方法
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
//主要代码实现：
[[self nextResponder] touchesBegan:touches withEvent:event];
//super调用，别漏
[super touchesBegan:touches withEvent:event];
}
//重写touchesEnded方法
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
[[self nextResponder] touchesEnded:touches withEvent:event];
[super touchesEnded:touches withEvent:event];
}
//重写touchesMoved方法
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
[[self nextResponder] touchesMoved:touches withEvent:event];
[super touchesMoved:touches withEvent:event];
}
@end
UIScrollView 与 touchesBegan 冲突解决方法
原文：http://www.cnblogs.com/slc-lover/p/5861617.html