Ios 用CGPoint拖动坐标

我想在拖动时从用户的手指获取坐标。我试过这个代码，但它说坐标总是{0，0}， 怎么了

- (IBAction)Drag{
UIPanGestureRecognizer *Recognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(dragged)];
[self.view addGestureRecognizer:Recognizer];
}
-(void) dragged{
UITouch *touch ;
CGPoint location = [touch locationInView:touch.view];
NSLog(@"%@", NSStringFromCGPoint (location));
}

我还尝试了

NSLog（@“%.2f%.2f”location.x，location.y）并且得到了相同的结果。
谢谢
这很正常，您使用的是
touch
，但从未为其赋值

手势识别器的操作采用一个参数，即识别器本身，该参数又有一个
locationInView:
方法，因此您应该使用该方法。此外，还需要检查识别器的状态。最后，您可能不想在需要时添加手势识别器，只需从头开始添加即可

// probably in your viewDidLoad
UIPanGestureRecognizer *Recognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self
                                       action:@selector(panGestureRecognizerAction:)];
[self.view addGestureRecognizer:Recognizer];

- (void)panGestureRecognizerAction:(UIPanGestureRecognizer *)recognizer
{
    if (recognizer.state == UIGestureRecognizerStateBegan ||
        recognizer.state == UIGestureRecognizerStateChanged)
    {
        CGPoint location = [recognizer.state locationInView:touch.view];
        NSLog(@"%@", NSStringFromCGPoint (location));
    }
}

工作，非常感谢你！