@implementation UIScrollView (ExtendTouch)- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {    [[self nextResponder] touchesBegan:touches withEvent:event];    [super touchesBegan:touches withEvent:event];    UITouch *touch = [touches anyObject];    CGFloat startx = [touch locationInView:self].x;    NSLog(@"%f",startx);}-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {    [[self nextResponder] touchesMoved:touches withEvent:event];    [super touchesMoved:touches withEvent:event];}- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {    [[self nextResponder] touchesEnded:touches withEvent:event];    [super touchesEnded:touches withEvent:event];}

        //添加點按擊手勢監聽器    UITapGestureRecognizer *tapGesture=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapUiscrollView:)];    //設置手勢屬性    tapGesture.delegate = self;    tapGesture.numberOfTapsRequired=1;//設置點按次數，默認為1，注意在iOS中很少用雙擊操作    tapGesture.numberOfTouchesRequired=1;//點按的手指數    [self.scrllview addGestureRecognizer:tapGesture];

@interface ViewController ()<UIScrollViewDelegate,UIGestureRecognizerDelegate>