将相机应用程序旋转复制到横向IOS 6 iPhone

pec*_*har 7 landscape portrait uiimagepickercontroller ios

嗨我正在尝试复制相同的旋转,当方向转移到横向时,可以在相机应用程序中看到.不幸的是我没有运气.我需要使用UIImagePickerController为自定义cameraOverlayView设置它.

从这幅肖像(B是UIButtons)

|-----------|
|           |
|           |
|           |
|           |
|           |    
|           |
| B   B   B |
|-----------|
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为了这个景观

|----------------|
|              B |
|                |
|              B |
|                |
|              B |
|----------------|
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换句话说,我希望按钮能够粘在原始肖像底部并在其中心旋转.我正在使用Storyboard并启用了Autolayout.任何帮助是极大的赞赏.

pec*_*har 16

好的,所以我设法解决了这个问题.需要注意的是UIImagePickerController类仅支持纵向模式,如Apple 文档所示.

要捕获旋转,willRotateToInterfaceOrientation这里没用,所以你必须使用通知.在运行时设置autolayout约束也不是可行的方法.

在AppDelegate中,didFinishLaunchingWithOptions您需要启用旋转通知:

// send notification on rotation
[[UIDevice currentDevice]beginGeneratingDeviceOrientationNotifications];
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viewDidLoadcameraOverlayView的方法中UIViewController添加以下内容:

//add observer for the rotation notification
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(orientationChanged:) name:UIDeviceOrientationDidChangeNotification object:nil]; 
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最后将orientationChanged:方法添加到cameraOverlayUIViewController

- (void)orientationChanged:(NSNotification *)notification
{
    UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];
    double rotation = 0;

    switch (orientation) {
        case UIDeviceOrientationPortrait:
            rotation = 0;
            break;
        case UIDeviceOrientationPortraitUpsideDown:
            rotation = M_PI;
            break;
        case UIDeviceOrientationLandscapeLeft:
            rotation = M_PI_2;
            break;
        case UIDeviceOrientationLandscapeRight:
            rotation = -M_PI_2;
            break;
        case UIDeviceOrientationFaceDown:
        case UIDeviceOrientationFaceUp:
        case UIDeviceOrientationUnknown:
        default:
            return;
    }
    CGAffineTransform transform = CGAffineTransformMakeRotation(rotation);
    [UIView animateWithDuration:0.4 delay:0.0 options:UIViewAnimationOptionBeginFromCurrentState animations:^{
        self.btnCancel.transform = transform;
        self.btnSnap.transform = transform;     
    }completion:nil];
}
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上面的代码在我使用的2个UIButtons上应用了旋转变换,在这种情况下是btnCancel和btnSnap.这样可以在旋转设备时为您提供相机应用效果.我仍然在控制台中收到警告,<Error>: CGAffineTransformInvert: singular matrix.不知道为什么会发生这种情况,但这与摄像机视图有关.

希望以上有所帮助.