目前有两种方法
第一种 通过 Category 扩展 UIScrollView 对象,添加触摸事件,(不建议,后续扩展不方便)代码如下
@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];
}
第二种 添加手势 (推荐,易于维护)
//添加点按击手势监听器
UITapGestureRecognizer *tapGesture=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapUiscrollView:)];
//设置手势属性
tapGesture.delegate = self;
tapGesture.numberOfTapsRequired=1;//设置点按次数，默认为1，注意在iOS中很少用双击操作
tapGesture.numberOfTouchesRequired=1;//点按的手指数
[self.scrllview addGestureRecognizer:tapGesture];
@interface ViewController ()<UIScrollViewDelegate,UIGestureRecognizerDelegate>