在UIPopoverController中丢失手势识别器

问题描述：

我有一个名为PhotoBoothController的类，用于使用手势操纵图像。当我在iPhone上运行它时，它工作正常。但是，当我在iPad上运行它时，我会在UIPopoverController中显示PhotoBoothController。图像显示正常，但我无法操作它，因为我的手势似乎无法识别。我不知道如何让UIPopoverController控制手势。在UIPopoverController中丢失手势识别器

目前我popovercontroller，因此配置视图：

- (void)presentPhotoBoothForPhoto:(UIImage *)photo button:(UIButton *)button { 

    //Create a photoBooth and set its contents 
    PhotoBoothController *photoBoothController = [[PhotoBoothController alloc] init]; 
    photoBoothController.photoImage.image = [button backgroundImageForState:UIControlStateNormal]; 

    //set up all the elements programmatically. 
    photoBoothController.view.backgroundColor = [UIColor whiteColor]; 

    //Add frame (static) 
    UIImage *frame = [[UIImage imageNamed:@"HumptyLine1Frame.png"] adjustForResolution]; 
    UIImageView *frameView = [[UIImageView alloc] initWithImage:frame]; 
    frameView.frame = CGRectMake(50, 50, frame.size.width, frame.size.height); 
    [photoBoothController.view addSubview:frameView]; 

    //Configure image 
    UIImageView *photoView = [[UIImageView alloc] initWithImage:photo]; 
    photoView.frame = CGRectMake(50, 50, photo.size.width, photo.size.height); 
    photoBoothController.photoImage = photoView; 

    //Add canvas 
    UIView *canvas = [[UIView alloc] initWithFrame:frameView.frame]; 
    photoBoothController.canvas = canvas; 
    [canvas addSubview:photoView]; 
    [canvas becomeFirstResponder]; 

    [photoBoothController.view addSubview:canvas]; 
    [photoBoothController.view bringSubviewToFront:frameView]; 

    //resize the popover view shown in the current view to the view's size 
    photoBoothController.contentSizeForViewInPopover = CGSizeMake(frameView.frame.size.width+100, frameView.frame.size.height+400); 

    self.photoBooth = [[UIPopoverController alloc] initWithContentViewController:photoBoothController]; 
    [self.photoBooth presentPopoverFromRect:button.frame 
            inView:self.view 
        permittedArrowDirections:UIPopoverArrowDirectionAny 
            animated:YES]; 
}

我想[canvas becomeFirstResponder]可能做到这一点，但它似乎不有所作为。

任何建议非常感谢，谢谢。

UPDATE：添加代码，根据注释

- (void)viewDidLoad { 
    [super viewDidLoad]; 

    if (!_marque) { 
    _marque = [CAShapeLayer layer]; 
    _marque.fillColor = [[UIColor clearColor] CGColor]; 
    _marque.strokeColor = [[UIColor grayColor] CGColor]; 
    _marque.lineWidth = 1.0f; 
    _marque.lineJoin = kCALineJoinRound; 
    _marque.lineDashPattern = [NSArray arrayWithObjects:[NSNumber numberWithInt:10],[NSNumber numberWithInt:5], nil]; 
    _marque.bounds = CGRectMake(photoImage.frame.origin.x, photoImage.frame.origin.y, 0, 0); 
    _marque.position = CGPointMake(photoImage.frame.origin.x + canvas.frame.origin.x, photoImage.frame.origin.y + canvas.frame.origin.y); 
    } 
    [[self.view layer] addSublayer:_marque]; 

    UIPinchGestureRecognizer *pinchRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(scale:)]; 
    [pinchRecognizer setDelegate:self]; 
    [self.view addGestureRecognizer:pinchRecognizer]; 

    UIRotationGestureRecognizer *rotationRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotate:)]; 
    [rotationRecognizer setDelegate:self]; 
    [self.view addGestureRecognizer:rotationRecognizer]; 

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

    UITapGestureRecognizer *tapProfileImageRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapped:)]; 
    [tapProfileImageRecognizer setNumberOfTapsRequired:1]; 
    [tapProfileImageRecognizer setDelegate:self]; 
    [canvas addGestureRecognizer:tapProfileImageRecognizer]; 

} 

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer { 
    return ![gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]] && ![gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]]; 
}

请将用于附加手势识别器的代码添加到您的UIPopoverController – Stavash

@stavash done - 代码位于PhotoBoothController类中。谢谢！ – Smikey

这是一个有趣的问题。如何将手势外部添加到UIPopoverController？我知道这需要做很多改动，但我现在没有其他建议。 – Stavash

答

一些猜测：

这是因为之前已设置卡瓦酒财产viewDidLoad方法已经叫什么名字？在这种情况下，您可以尝试使用另一种方法（如viewDidAppear）在弹出窗口中添加识别器。
我也同意，关键可能是UIPopoverController允许与popover之外的其他视图进行交互。所以我建议将[canvas becomeFirstResponder];移动到PhotoBoothController的viewDidLoad方法的末尾，并在此尝试self.view becomeFirstResponder，因为您实际上是在self.view中添加了识别器。

答

我正在研究一个类似的应用程序，我可以轻松地在画布上操作图像。

1）检查画布的userInteractionEnabled属性是否设置为是。
2）您可以尝试将手势添加到ImageView的手势而不是画布。（我猜你想缩放，旋转n滑动图像）。

在UIPopoverController中丢失手势识别器

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