视频捕获代码在iphone 4上不起作用

我已经使用UiImagePickerController在iPhone3GS中捕获了视频，但是同一个应用程序在iPhone4上没有使用摄像机，它在iPhone3GS（OS4）上也可以正常工作

下面是我用来启动摄像机的代码

UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
imagePicker.mediaTypes =  [NSArray arrayWithObject:(NSString *)kUTTypeMovie];
imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePicker.delegate = self;
[self presentModalViewController:imagePicker animated:YES];   
[imagePicker release];

您需要指定您的

UIImagePickerControllerCameraDevice

要么

UIImagePickerControllerCameradevicerar

或

UIImagePickerControllerCameraDeviceFront

在iPhone4上

另外，设置

UIImagePickerControllerCameraCaptureMode

到

UIImagePickerControllerCameraCaptureModeVideo

---

谢谢nd6，我会尝试一下。我应该如何检测设备上的当前操作系统版本。好的，这是我得到的：NSString*systemVersion=[[UIDevice currentDevice]systemVersion]；如果（[systemVersion floatValue]>4.0）{imagePicker.cameraDevice=UIImagePickerControllerCameradeVicerar；imagePicker.cameraCaptureMode=UIImagePickerControllerCameraCaptureModeVideo；imagePicker.videoQuality=UIImagePickerControllerQualityTypeHigh；}或者，您可以使用isCameraDeviceAvailable（）检查设备是否可用。请将此解决方案用于系统版本：