Question

我得到了这个加载uipickerviewcontroller的uiactionsheet 它位于UISplitViewController

中的viewcontroller中

它是一个UIsplitviewcontroller，这个代码在detailview上，detailview是从masterview调用的

然而，当我尝试加载它时，请点击它＆＃34;它给了我一个警告，并没有进一步

   func actionSheet(actionSheet: UIActionSheet!, clickedButtonAtIndex buttonIndex: Int){
    var imagePicker = UIImagePickerController()
    imagePicker.delegate = self

    switch buttonIndex{

    case 0:
        imagePicker.sourceType = UIImagePickerControllerSourceType.SavedPhotosAlbum
        imagePicker.allowsEditing = true
        imagePicker.delegate = self
        NSLog("Vælg fra Biblioteket");
        break;
    case 1:
        imagePicker.sourceType = UIImagePickerControllerSourceType.Camera
        imagePicker.allowsEditing = true
        imagePicker.delegate = self
        NSLog("Vælg Kamera");
        break;
    default:
        NSLog("Default");
        break;
    }
    self.presentViewController(imagePicker, animated: true, completion: nil) // this is the problem 
}

警告是这样的：警告：尝试呈现已经呈现的（null）

如果我使用它： self.showDeatilViewController（imagePicker，true）它显示但是我根本无法解雇它

这是我认为它会被解雇的方式

    func imagePickerControllerDidCancel(picker: UIImagePickerController) {

    picker.dismissViewControllerAnimated(true, completion: nil)
}

如果我在viewDidLoad中运行此代码，它可以正常工作

        var imagePickerController = UIImagePickerController()
    imagePickerController.delegate = self
    imagePickerController.sourceType = UIImagePickerControllerSourceType.SavedPhotosAlbum
    imagePickerController.allowsEditing = true
    self.presentViewController(imagePickerController, animated: true, completion: { imageP in

    })

我想到如果我这样写：

        self.presentedViewController?.presentViewController(imagePicker, animated: true, completion: nil)

它显示并关闭？！？！

Answer 1

我已经让它工作了...有人提醒我注意8.0 IOS有一个错误，打开photolibery等应用程序.. 所以我把它放在像这样的主队列中

dispatch_async(dispatch_get_main_queue()){
        imagePicker.delegate = self
        self.presentViewController(imagePicker, animated: true, completion: nil)
    }

现在它有效！

稍微延迟但是有效

如何显示viewcontroller：UIImagePickController并解除它（Swift）

1 个答案: