Iphone 当对象移动到某一帧时，如何停止UIPangestureRecognitor

我有一个图像类型的对象，我正在使用uipangestrerecognizer移动它，当对象到达某一帧时，我需要停止识别uipangestrerecognizer

    UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(move:)];
    [panRecognizer setMinimumNumberOfTouches:1];
    [panRecognizer setMaximumNumberOfTouches:1];
    [panRecognizer setDelegate:self];
    [templatePhotoPlaceholderView addGestureRecognizer:panRecognizer];

-(void)move:(UIPanGestureRecognizer *)gestureRecognizer
{
    CGPoint translatedPoint = [gestureRecognizer translationInView:templatePhotoPlaceholderView];

    if([gestureRecognizer state] == UIGestureRecognizerStateBegan) {
        _firstX = [imageview center].x;
        _firstY = [imageview center].y;
    }



    translatedPoint = CGPointMake(_firstX+translatedPoint.x, _firstY+translatedPoint.y);
    //NSLog(@" Move center point :%@", NSStringFromCGPoint(translatedPoint));

    [imageview setCenter:translatedPoint];  

}

---

如何执行此操作？

UIgestureRecognitors具有已启用的属性。文件：

禁用手势识别器，使其不接收触摸。这个 默认值为“是”。如果在一段时间内将此属性更改为“否” 手势识别器当前正在识别一个手势 识别器转换到取消状态

编辑：

只需将enabled属性设置为NO

gestureRecognizer.enabled = NO;

---

当您需要停止UIPangestureRecognitor识别手势时，只需将此代码行（如jbat100所述）放入

-（void）move:（UIPangestureRecognitor*）手势识别器中即可：

gestureRecognizer.enabled = NO;

在这一行之后，您的gestureRecognizer状态设置为“UIGestureRecognizerStateConcelled”

然后只需在

-（void）move:（UIPanGestureRecognizer*）手势识别器

函数中添加几行即可：

if ([gestureRecognizer state] == UIGestureRecognizerStateCancelled) {
     gestureRecognizer.enabled = YES;
}

你可以使用手势识别器

编辑：

下面是代码片段：

- (void)move:(UIPanGestureRecognizer *)gestureRecognizer {
    BOOL cancelPanGesture = YES;
    if (cancelPanGesture) {
        /* 
         After this line gesture recognizer will be disabled, state will be UIGestureRecognizerStateCancelled
         and this method (move:) will fire one more time.
         */
        gestureRecognizer.enabled = NO;
    }
    if (gestureRecognizer.state == UIGestureRecognizerStateCancelled) {
        gestureRecognizer.enabled = YES;
    }
}

---

设置pangesture.delegate=self，并实现delegate方法

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
     //return NO when you reach the frame
}

---

你好，杰巴特。你能给我一些行代码的样本吗。对于停止UIGestureRecognizersAnswer没有意义，确切地说，

gestureRecognizer.enabled=YES。如果你能详细说明的话，会更有意义的。我喜欢这个。它将识别器的状态封装在该函数中，而不是将愚蠢的
shouldCancelPan
实例变量放入代码中。使用此技术，当我到达某个点并设置识别器时。enabled=false，它将移动到取消状态，在该状态下，我再次启用它，但手势不会开始，直到我抬起手指然后重新开始。