自定义相机旋转问题 [英] Custom Camera Rotation problems

问题描述

我有一个自定义相机叠加层，像所有相机视图一样，在横向模式下是默认的。我有一些方向变化逻辑，检测方向的变化，所以我可以旋转我放置的按钮和视图。此外，我编辑了shouldAutoRotateInterfaceTo方法，所以它不会旋转相机打开时：

I have a custom camera overlay that, like all camera views, is default in landscape mode. I have some orientation change logic that detect when the orientation changes so I can rotate the buttons and views that I have placed. Also, I have edited the shouldAutoRotateInterfaceTo method so it does not rotate while the camera is on:

- (BOOL)shouldAutorotateToInterfaceOrientation
               (UIInterfaceOrientation)interfaceOrientation  {
        if (cameraIsOn) {
            return NO;
        }
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

问题：相机视图仍旋转为Portrait模式，当我将相机倾斜到风景。

Problem: the camera view still rotates into Portrait mode when I tilt the camera into Landscape. This results in the device being in Landscape position while the view is in Portrait, running off of the screen.

如果有帮助，这里是我用来检测方向的方法更改和转换我的按钮：

If it helps, here is the method I use to detect orientation changes and transform my buttons:

- (void)cameraOrientationChanged  {
UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];
CGAffineTransform transform;
switch (orientation) {
    case UIDeviceOrientationPortrait:
        transform = CGAffineTransformIdentity;
        self.rotatePrompt.hidden = NO;
        break;
    case UIDeviceOrientationPortraitUpsideDown:
        //transform = CGAffineTransformMakeRotation(180*M_PI/180);
        transform = CGAffineTransformIdentity;
        self.rotatePrompt.hidden = NO;
        break;
    case UIDeviceOrientationLandscapeLeft:
        //transform = CGAffineTransformMakeRotation(90*M_PI/180);
        self.rotatePrompt.hidden = YES;
        transform = CGAffineTransformIdentity;
        break;
    case UIDeviceOrientationLandscapeRight:
        //transform = CGAffineTransformMakeRotation(-90.0*M_PI/180);
        transform = CGAffineTransformMakeRotation(180*M_PI/180);
        self.rotatePrompt.hidden = YES;
        break;
    default:
        transform = CGAffineTransformIdentity;
        break;
}
self.shootButton.transform = transform;
self.cameraTypeButton.transform = transform;
self.photoLibraryButton.transform = transform;
self.changeCameraDirectionButton.transform = transform;
self.flashButton.transform = transform;
self.videoTimerLabel.transform = transform;
self.closeCameraButton.transform = transform;

}

/ strong>这似乎是在我升级到iOS 5之前工作确定。

Note This seemed to be working ok before I upgraded to iOS 5.

更多信息
通过查看我的XIB文件，我可以看到，我在人像模式下创建了叠加。当相机重叠旋转时，当设备正在横向位置时，设备正在进入Portrait模式。

More Info By looking at my Xib file, I can see that I created the overlay in Portrait mode. When the camera overlay rotates it is moving into Portrait mode while the device is being help in Landscape position.

更奇怪的是，每当发生这种情况，我注意到shouldAutorotateToInderfaceOrientation没有在视图控制器中调用。

Even more peculiar, whenever this happens (it does not always happen), I noticed that shouldAutorotateToInderfaceOrientation is not being called in the view controller. I bet that has something to do with the problem here.

推荐答案

问题出在我的导航控制器设置。 UIImagePickerController将旋转消息发送到根视图控制器的shouldAutoRotateToInterface：方法。但是，由于我从一个旧项目（iOS 3）复制类，它没有自动复制shouldAutoRotateToInterface：方法。现在我在我的根视图控制器中写了方法，旋转问题是固定的。

The problem is with my navigation controller setup. UIImagePickerController sends the rotation message to the root view controller's shouldAutoRotateToInterface: method. However, since I copied the class from an older project (iOS 3), it did not have the shouldAutoRotateToInterface: method automatically copied. Now that I wrote the method in my root view controller, to rotation problem is fixed.

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