IOS设备滑动事件

只要手指触摸屏幕，滑动，从屏幕离开，系统都会产生UIEvent对象类型的事件---当然包括UITouch事件
– touchesBegan:withEvent:   当用户触摸到屏幕时调用方法
– touchesMoved:withEvent:  当用户触摸到屏幕并移动时调用此方法
– touchesEnded:withEvent:  当触摸离开屏幕时调用此方法

– touchesCancelled:withEvent:  当触摸被取消时调用此方法

 例子如下：

//滑动开始事件
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event  
{  
    UITouch *touch = [touches anyObject];  
    CGPoint pointone = [touch locationInView:self.view];//获得初始的接触点  
    self.startPoint  = pointone;  
}
//滑动移动事件
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event  
{  
    UITouch *touch = [touches anyObject];  
//imgViewTop是滑动后最后接触的View
        CGPoint pointtwo = [touch locationInView:imgViewTop];  //获得滑动后最后接触屏幕的点  
        
        if(fabs(pointtwo.x-startPoint.x)>100)
        {  //判断两点间的距离  
            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-startPoint.x)>50)&&(bMove))
        {
            //判断点的位置关系 左滑动
            if(pointtwo.x-startPoint.x>0)
            {   //左滑动业务处理
                if (clicks>0) {
                    clicks--;
                    if ([wyKPI.sortZbs count]>1) {
                        [btnRight setEnabled:YES];
                        if(clicks==0)
                        {
                            [btnLeft setEnabled:NO];
                            [btnRight setEnabled:YES];
                        }
                        [labTitle setText:[wyKPI.sortZbs objectAtIndex:(NSUInteger)clicks]];
                        [labTitle setFont:[UIFont systemFontOfSize:14.0f]];
                        [tabWyKPI reloadData];
                    }
                }
            }
            //判断点的位置关系 右滑动
            else
            {  //右滑动业务处理
                if (clicks<[wyKPI.sortZbs count]-1) {
                    clicks++;
                    if ([wyKPI.sortZbs count]>1) {
                        [btnLeft setEnabled:YES];
                        if(clicks==[wyKPI.sortZbs count]-1)
                        {
                            [btnLeft setEnabled:YES];
                            [btnRight setEnabled:NO];
                        }
                        [labTitle setText:[wyKPI.sortZbs  objectAtIndex:clicks]];
                        [labTitle setFont:[UIFont systemFontOfSize:14.0f]];
                        [tabWyKPI reloadData];
                    }
                }
            }  
        }
}