iOS之touch手势用法/locationInView:与translationInView:的区别

本文主要是介绍iOS之touch手势用法/locationInView:与translationInView:的区别，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

//开始点击

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

    UITouch *touch=[touches anyObject];//获取一个触摸对象

    CGPoint cur=[touch locationInView:self.view];//当前点

    CGPoint  pre=[touch previousLocationInView:self.view];//上一个点

    CGPoint  dd=[touch preciseLocationInView:self.view];

    NSLog(@"--%f--%f---%f",cur.x,pre.x,dd.x);

}

//点击结束

-(void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

}

//移动

-(void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

}

//取消点击

-(void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

}

一、locationInView:与translationInView:的区别

- (void)viewDidLoad {

    [superviewDidLoad];

    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizeralloc]initWithTarget:selfaction:@selector(move:)];

    [self.viewaddGestureRecognizer:pan];

 

}

- (void)move:(UIPanGestureRecognizer *)pan {

    CGPoint point = [pan locationInView:self.view];／／self.view是手势作用在哪个view上。以父 view左上角为原点；

    CGPoint transPoint = [pan translationInView:self.view];／／以自身的左上角为原点；每次移动后，原点都置0；计算的是相对于上一个位置的偏移；

    NSLog(@"locationInView:%f--%f\n -- translationInView:%f--%f",point.x,point.y,transPoint.x,transPoint.y);

CGRectContainsPoint(button.frame, point)；----判断点是否在button上；

}

打印如下：

2016-04-22 11:06:02.212 xdSchoolChat[13082:1214518] locationInView:136.000000--308.000000

 -- translationInView:3.000000--0.000000

2016-04-22 11:06:02.229 xdSchoolChat[13082:1214518] locationInView:141.000000--312.000000

 -- translationInView:8.000000--4.000000

2016-04-22 11:06:02.229 xdSchoolChat[13082:1214518] locationInView:141.000000--312.000000

 -- translationInView:8.000000--4.000000

2016-04-22 11:06:02.246 xdSchoolChat[13082:1214518] locationInView:147.000000--316.500000

 -- translationInView:14.000000--8.500000

2016-04-22 11:06:02.263 xdSchoolChat[13082:1214518] locationInView:151.500000--320.000000

 -- translationInView:18.500000--12.000000

2016-04-22 11:06:02.281 xdSchoolChat[13082:1214518] locationInView:154.500000--323.000000

 -- translationInView:21.500000--15.000000

2016-04-22 11:06:02.298 xdSchoolChat[13082:1214518] locationInView:157.500000--325.500000

 -- translationInView:24.500000--17.500000

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