在iOS中的相机覆盖视图中的暴光触摸（camerapicker）？ [英] Exlusive touch in cameraoverlay view (of the camerapicker) in iOS?

问题描述

在我的应用程序中，我向摄像师添加了 cameraOverlayView 。它包含三个子视图，两个 UIButtons 和一个 UIImageView 。图像是可拖动的。

In my application, I added a cameraOverlayView to the camerapicker. It contains three subviews, two UIButtons and one UIImageView. The image is draggable. The buttons are used to change the image to another one.

当我触摸按钮或图像时，相机的拍摄对焦矩形将始终为显示在下面（并且实际焦点将改变）。在所有三个子视图中设置 exclusiveTouch 到到不会改变行为。

When I touch a button, or the image, the tap-to-focus rect of the camera will always be displayed beneath (and the actual focus will change). Setting exclusiveTouch to YES on all three subviews doesn't change the behaviour.

任何想法，我怎么可以阻止摄影师获得我的重叠视图的按钮/子视图的触摸（但仍然得到触摸对焦，切换摄像头等）？

Any idea, how i can stop the camerapicker from getting the touches of my buttons / subviews of my overlayview (but still getting the touches for touch-to-focus, switching cameras etc.)?

提供更多信息。我使用下面的代码，允许相机交互时有一个overlayview，这些子视图仍然得到触摸。

To give some more information. I'm using the following code, to allow camera interaction while having an overlayview, which subviews still get the touches.

// CameraOverlayView.m

[...]

// ignore touches on this view, but not on the subviews
-(id)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
    id hitView = [super hitTest:point withEvent:event];
    if (hitView == self) return nil;
    else return hitView;
}

推荐答案

停止这一点，我发现。没有办法做我真正想要做的。但是调整它会给你一些可用的东西。

There are a couple of ways to stop this that I found. None of the ways do exactly what I would like it to do. But tweaking it around should give you something usable.

1）禁用相机控制。 cameraPickerController.showsCameraControls = NO; 这将最终取消触摸从屏幕的焦点，但它也会删除其他控件。

1.) Disable camera control. cameraPickerController.showsCameraControls = NO; This will ultimately take down the touch to focus from the screen but it would take down other controls too.

2。）控制overlayView中的hitTest并将这些区域设置为nil。这个解决方案是非常尴尬，但它适用于我。

2.) Control the hitTest in your overlayView and set those area to nil. This solution is very awkward but it works for me.

这是我管理面罩的overlayView

This is my overlayView that manages a face mask

- (id)initWithFrame:(CGRect)frame imagePicker: (UIImagePickerController *) imagepicker{
    self = [super initWithFrame:frame];
    if (self) {
        faceMaskButton = [UIButton buttonWithType:UIButtonTypeCustom];
        faceMaskButton.backgroundColor = [UIColor colorWithRed:1 green:1 blue:1 alpha:.2];
        faceMaskButton.frame = CGRectMake(10, 10, 70, 35);
        faceMaskButton.layer.borderColor = [[UIColor colorWithRed:0 green:0 blue:0 alpha:.6] CGColor];
        faceMaskButton.layer.borderWidth = 1;
        faceMaskButton.layer.cornerRadius = 17;
        [faceMaskButton setImage:[UIImage imageNamed:@"Facemask button"] forState:UIControlStateNormal];
        [faceMaskButton addTarget:self action:@selector(facemask) forControlEvents:UIControlEventTouchDown];
        faceMaskButton.exclusiveTouch = YES;
        faceMaskButton.autoresizingMask = UIViewAutoresizingFlexibleTopMargin|UIViewAutoresizingFlexibleBottomMargin|UIViewAutoresizingFlexibleLeftMargin|UIViewAutoresizingFlexibleRightMargin;
        [self addSubview:faceMaskButton];
        loadingFacemask = NO;

        overlayImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Camera Face Overlay"]];
        overlayImage.frame = CGRectMake((self.bounds.size.width - 400)/2, (self.bounds.size.height - 400)/3, 400, 400);
        overlayImage.autoresizingMask = UIViewAutoresizingFlexibleTopMargin|UIViewAutoresizingFlexibleBottomMargin|UIViewAutoresizingFlexibleLeftMargin|UIViewAutoresizingFlexibleRightMargin;
        overlayImage.alpha = 0.9f;
        [self addSubview:overlayImage];

        imagePickerController = imagepicker;
    }
    return self;
}

- (void) facemask{
    if (!loadingFacemask) {
        loadingFacemask = YES;
        [UIView animateWithDuration:.3 animations:^{
            overlayImage.alpha = overlayImage.alpha? 0:1;
            faceMaskButton.backgroundColor = [UIColor colorWithRed:1 green:1 blue:1 alpha:1];
        } completion:^(BOOL finished) {
            faceMaskButton.backgroundColor = [UIColor colorWithRed:1 green:1 blue:1 alpha:.2];
            loadingFacemask = NO;
        }];
    }
}
-(UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event{
    if ((self.bounds.size.height - 44)<point.y){
        return imagePickerController.view;
    }

    if (point.x < faceMaskButton.bounds.origin.x + faceMaskButton.bounds.size.width +10 && point.y < faceMaskButton.bounds.origin.y + faceMaskButton.bounds.size.height + 10) {
        [self facemask];
        return nil;
    }

    return self;
}

所以如果你调整，这将适合你。我仍然在寻找魔术棒，使这项工作没有所有的黑客。没有符号：（

So if you get tweaking, this will work for you. I am still looking for the magic wand that make this work without all the hacks. No sign of it still :(

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