Question

初始化视图时，我使用以下代码初始化手势识别器。但是，在多次使用手势识别器在视图上方呈现视图并使用presentModalViewController和dismissModelViewController解除视图后，手势识别器将停止处理原始视图。我尝试在视图的dealloc函数中手动释放识别器而不是使用自动释放，但它似乎没有帮助。有没有人有任何想法？谢谢！

另外，我应该提一下，这个问题只发生在设备上，而不是模拟器上。

-(void) initializeGestures {    

recognizer = [[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapGesture:)] autorelease];
//recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapGesture:)];
[(UITapGestureRecognizer *)recognizer setNumberOfTouchesRequired:1];
[self.view addGestureRecognizer:recognizer];
recognizer.delegate = self;

swipeLeftGesture = [[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeGestureLeft:)] autorelease];
//swipeLeftGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeGestureLeft:)];
swipeLeftGesture.direction = UISwipeGestureRecognizerDirectionLeft;
[self.view addGestureRecognizer:swipeLeftGesture];
swipeLeftGesture.delegate = self;

swipeRightGesture = [[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeGestureRight:)] autorelease];
//swipeRightGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeGestureRight:)];
swipeRightGesture.direction = UISwipeGestureRecognizerDirectionRight; // default
[self.view addGestureRecognizer:swipeRightGesture];
swipeRightGesture.delegate = self;
}

-(IBAction) handleSwipeGestureLeft:(UISwipeGestureRecognizer*)sender
{
    [self swipeLeft];
}

-(IBAction) handleSwipeGestureRight:(UISwipeGestureRecognizer*)sender
{
    [self swipeRight];
}

-(IBAction) handleTapGesture:(UITapGestureRecognizer *) sender {
    [self gotoDefinition];
}

Answer 1

当你呈现另一个viewController时，

用手势识别器dealloc做了视图吗？这将导致视图删除手势识别器

使用presentModalViewController并解雇后，GestureRecognizers停止工作

1 个答案: