Ios UIImagePickerControllerSourceType.SavedPhotosAlbum调用黑屏

我需要从用户库中获取图像。这在UIImagePickerControllerSourceType.Camera中可以正常工作，但当我使用UIImagePickerControllerSourceType.SavedPhotosAlbum调用UIImagePickerControllerSourceType.SavedPhotosAlbum时，会得到一个黑色图像：

这是我的代码：

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        let picker : TGMImagePicker = segue.destinationViewController as TGMImagePicker
        if segue.identifier == "Camera" {
            picker.sourceType = UIImagePickerControllerSourceType.Camera
        } else if segue.identifier == "Library" {
            picker.sourceType = UIImagePickerControllerSourceType.SavedPhotosAlbum
        }

        picker.setCaptureBlock { (image) -> Void in
            self.userImageView.image = image
        }
    }

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哇，就在我发表评论的时候，我找到了一个解决办法。如果您仍在查看，我的关键是添加初始化pickercontroller的顶行：

if(segue.identifier == "presentCameraPicker"){
        var nextVC = cameraPickerController()
        nextVC = segue.destinationViewController as cameraPickerController
        nextVC.sourceType = UIImagePickerControllerSourceType.Camera
}else if(segue.identifier == "presentPhotoPicker"){
       var nextVC = cameraPickerController()
        nextVC = segue.destinationViewController as cameraPickerController
        nextVC.sourceType = UIImagePickerControllerSourceType.SavedPhotosAlbum
}

---

请注意，我在情节提要中对同一视图控制器使用了两个不同的分段。。camerapicker的是模态演示，photopicker的是popover

如果您将其更改为UIImagePickerControllerSourceType.PhotoLibrary，您得到的是相同的吗？是的，我得到的是相同的屏幕：/您找到过这个的分辨率吗？如果你认为你的代码是正确的，检查你的应用程序是否有权限：设置->隐私->照片