检测 UIImagePickerController 中的方向变化？

发布于 2024-08-17 22:02:03 字数 291 浏览 9 评论 0 原文

我试图检测 UIImagePickerController 中的方向变化（它继承自 UINavigationController : UIViewController : UIResponder : NSObject），并且我尝试覆盖 UIViewController 中的方法 - (BOOL)shouldAutorotateToInterfaceOrientation (UIInterfaceOrientation)interfaceOrientation 但没有成功。？

有什么建议吗

提前致谢...

原文

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

折戟 2024-08-24 22:02:03

不支持子类化 UIImagePickerController！

此类旨在按原样使用，不支持子类化。

也许您可以注册 UIDevice 的“nofollow noreferrer”>UIDeviceOrientationDidChangeNotification 并使用它？

回复收藏 0 原文

浸婚纱 2024-08-24 22:02:03

现在在这里回答已经太晚了，但我正在扩展@Adam Woś的答案，

在呈现 UIImagePickerController 之前，

UIImagePickerController *controllerObject = [[UIImagePickerController alloc] init];
...
...
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self  selector:@selector(orientationChanged:)name:UIDeviceOrientationDidChangeNotification  object:nil];
...
...
[self presentViewController:controllerObject animated:YES completion:nil];

- (void)orientationChanged:(NSNotification *)notification{
    [self adjustViewsForOrientation:UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation]];
}

- (void) adjustViewsForOrientation:(UIInterfaceOrientation)orientation
{
    if(orientation == UIDeviceOrientationLandscapeLeft || orientation == UIDeviceOrientationLandscapeRight)
    {
        NSLog(@".....landscape.....");
    }
    else if(orientation == UIDeviceOrientationPortrait || orientation == UIDeviceOrientationPortraitUpsideDown)
    {
        NSLog(@".....portrait.....");
    }
}

当 UIImagePickerController 被解雇时不要忘记，

[[NSNotificationCenter defaultCenter]removeObserver:self name:UIDeviceOrientationDidChangeNotification object:nil];
[[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];

另请注意，根据 @FelixLam 对 @Adam Woś 答案的评论，

如果设备方向被锁定，则不再发布通知。

为了处理这种情况，需要实现 CoreMotion（替代的 UIAccelerometer iOS <6.0）来检测设备方向是否被锁定。这是 UIAccelerometer http://blog.sallarp. 的博客。 com/iphone-accelerometer-device-orientation/ 这是用于 CoreMotion https ://github.com/tastyone/MotionOrientation 您必须使用一些逻辑来检查这一点。

祝你好运！

This is too late to answer here, but I'm expanding @Adam Woś answer,

Before presenting UIImagePickerController,

UIImagePickerController *controllerObject = [[UIImagePickerController alloc] init];
...
...
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self  selector:@selector(orientationChanged:)name:UIDeviceOrientationDidChangeNotification  object:nil];
...
...
[self presentViewController:controllerObject animated:YES completion:nil];

- (void)orientationChanged:(NSNotification *)notification{
    [self adjustViewsForOrientation:UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation]];
}

- (void) adjustViewsForOrientation:(UIInterfaceOrientation)orientation
{
    if(orientation == UIDeviceOrientationLandscapeLeft || orientation == UIDeviceOrientationLandscapeRight)
    {
        NSLog(@".....landscape.....");
    }
    else if(orientation == UIDeviceOrientationPortrait || orientation == UIDeviceOrientationPortraitUpsideDown)
    {
        NSLog(@".....portrait.....");
    }
}

When UIImagePickerController get dismiss don't forget,

[[NSNotificationCenter defaultCenter]removeObserver:self name:UIDeviceOrientationDidChangeNotification object:nil];
[[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];

Also note that, as per @FelixLam comment on @Adam Woś answer,

if device orientation is locked then notifications no longer posted.

To handle this situation, one need to implement CoreMotion (alternative UIAccelerometer iOS < 6.0) to detect that device orientation is locked or not. Here's the blog for UIAccelerometer http://blog.sallarp.com/iphone-accelerometer-device-orientation/ and this is for CoreMotion https://github.com/tastyone/MotionOrientation You'll have to kick some logic to check this.

Good luck!

回复收藏 0 原文

陌上芳菲 2024-08-24 22:02:03

来自官方 UIImagePickerController 文档：

重要提示： UIImagePickerController 类仅支持纵向模式。该类旨在按原样使用，不支持子类化。此类的视图层次结构是私有的，不得修改，但有一个例外。在iPhone OS 3.1及更高版本中，您可以将自定义视图分配给cameraOverlayView属性，并使用该视图来呈现附加信息或管理相机界面与代码之间的交互。