iPhone相机变焦问题

Question

overlay = [[UIView alloc] initWithFrame:CGRectZero];
    imageView.image = nil;
    if([UIImagePickerController isSourceTypeAvailable:
        UIImagePickerControllerSourceTypeCamera])
    {
        picker = [[UIImagePickerController alloc] init];
        picker.sourceType = UIImagePickerControllerSourceTypeCamera;
        picker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto;
        picker.cameraDevice = UIImagePickerControllerCameraDeviceRear;
        // picker.cameraDevice = UIImagePickerControllerCameraDeviceFront;
        picker.allowsEditing = NO;
        picker.showsCameraControls = NO;
        picker.navigationBarHidden = YES;
        picker.toolbarHidden = YES;
       [picker.view addSubview:overlay];
       [self presentViewController:picker animated:NO completion:nil];
}

我有一个问题，当打开相机选择器看起来像小放大但拍照时，照片与相机视图中看不完全相同。

Answer 1

添加此

picker.cameraViewTransform=CGAffineTransformMakeScale(1,1);

之后

picker.sourceType = UIImagePickerControllerSourceTypeCamera;