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：

1. //滑动开始事件
2. - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
3. {
4. UITouch *touch = [touches anyObject];
5. CGPoint pointone = [touch locationInView:self.view];//获得初始的接触点
6. self.startPoint  = pointone;
7. }
8. //滑动移动事件
9. - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
10. {
11. UITouch *touch = [touches anyObject];
12. //imgViewTop是滑动后最后接触的View
13. CGPoint pointtwo = [touch locationInView:imgViewTop];  //获得滑动后最后接触屏幕的点
14. if(fabs(pointtwo.x-startPoint.x)>100)
15. {  //判断两点间的距离
16. bMove = YES;
17. }
18. }
19. //滑动结束处理事件
20. -(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
21. {
22. UITouch *touch = [touches anyObject];
23. CGPoint pointtwo = [touch locationInView:self.view];  //获得滑动后最后接触屏幕的点
24. if((fabs(pointtwo.x-startPoint.x)>50)&&(bMove))
25. {
26. //判断点的位置关系 左滑动
27. if(pointtwo.x-startPoint.x>0)
28. {   //左滑动业务处理
29. if (clicks>0) {
30. clicks--;
31. if ([wyKPI.sortZbs count]>1) {
32. [btnRight setEnabled:YES];
33. if(clicks==0)
34. {
35. [btnLeft setEnabled:NO];
36. [btnRight setEnabled:YES];
37. }
38. [labTitle setText:[wyKPI.sortZbs objectAtIndex:(NSUInteger)clicks]];
39. [labTitle setFont:[UIFont systemFontOfSize:14.0f]];
40. [tabWyKPI reloadData];
41. }
42. }
43. }
44. //判断点的位置关系 右滑动
45. else
46. {  //右滑动业务处理
47. if (clicks<[wyKPI.sortZbs count]-1) {
48. clicks++;
49. if ([wyKPI.sortZbs count]>1) {
50. [btnLeft setEnabled:YES];
51. if(clicks==[wyKPI.sortZbs count]-1)
52. {
53. [btnLeft setEnabled:YES];
54. [btnRight setEnabled:NO];
55. }
56. [labTitle setText:[wyKPI.sortZbs  objectAtIndex:clicks]];
57. [labTitle setFont:[UIFont systemFontOfSize:14.0f]];
58. [tabWyKPI reloadData];
59. }
60. }
61. }
62. }
63. }

//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];
                    }
                }
            }
        }
}