IOS手指触摸滑动

//滑动开始事件
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
//    NSLog(@"开始了");
UITouch *touch = [touches anyObject];
CGPoint pointone = [touch locationInView:self.view];//获得初始的接触点
//以字符的形式输出触摸点

_startX  = pointone.x;
NSLog(@"触摸点的坐标：%f",_startX);
}
//滑动移动事件
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
//    NSLog(@"移动啦");
UITouch *touch = [touches anyObject];
//imgViewTop是滑动后最后接触的View
CGPoint pointtwo = [touch locationInView:self.view];  //获得滑动后最后接触屏幕的点
NSLog(@"移动点的坐标：%f,%f",pointtwo.x,_startX);
int position = (pointtwo.x-_startX);
NSLog(@"position is %d",position);
if(fabs(pointtwo.x-_startX)>100)
{  //判断两点间的距离
NSLog(@"移动了");
_bMove = YES;
}
}

//滑动结束处理事件
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint pointtwo = [touch locationInView:self.view];  //获得滑动后最后接触屏幕的点
if((fabs(pointtwo.x-_startX)>50)&&(_bMove))
{
//判断点的位置关系 左滑动
if(pointtwo.x-_startX>0)
{   //左向右滑动业务处理
NSLog(@"左向右移动");

}
//判断点的位置关系 右滑动
else
{  //右向左滑动业务处理
NSLog(@"右移动");
[self goToNext];
}
}
}