学步园

  近期正在开发一款摄像头的app，但camera  总是随着手机旋转而改变，太另人恼火了。今天终于在stack Overflow上找到了解决方法。

首先设置imagepicker

//Initialize picker<br /> UIImagePickerController * picker = [[UIImagePickerController alloc] init];<br /> picker.delegate = self;</p> <p>//set Device to Landscape. This will give you a warning. I ignored it.<br /> //warning: 'UIDevice' may not respond to '-setOrientation:'</p> <p>[[UIDevice currentDevice] setOrientation:UIInterfaceOrientationLandscapeRight];<br /> //Set Notifications so that when user rotates phone, the orientation is reset to landscape.<br /> [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];<br /> //Refer to the method didRotate:<br /> [[NSNotificationCenter defaultCenter] addObserver:self<br /> selector:@selector(didRotate:)<br /> name:@"UIDeviceOrientationDidChangeNotification" object:nil];<br /> //Set the picker source as the camera<br /> picker.sourceType = UIImagePickerControllerSourceTypeCamera;<br /> //Bring in the picker view<br /> [self presentModalViewController:picker animated:YES]; 

响应函数

- (void) didRotate:(NSNotification *)notification<br /> {<br /> //Maintain the camera in Landscape orientation<br /> [[UIDevice currentDevice] setOrientation:UIInterfaceOrientationLandscapeRight];<br /> }