如何显示相机但不让用户拍照？

Question

如何让用户看到前置摄像头,但是阻止他们拍摄照片,视频或切换到iPhone 4/4s和/或iPod Touch 4上的后置摄像头？

Answer 1

cameraPicker = [[UIImagePickerController alloc] init];
....
cameraPicker.showsCameraControls = NO;
cameraPicker.cameraDevice = UIImagePickerControllerCameraDeviceFront;