Question

我正在创建自己的UIImagePicker Overlay并使用Xib来显示叠加层。每当我呈现imagepicker时，它似乎呈现两次，一次当我调用主包来加载nib时，另一次当我明确地呈现imagepickercontroller时。我遇到的主要问题是当我关闭imagepickercontroller时，第一个问题就出现了，这很好，但xib的基础视图仍然存在，并且不管我做什么都不行。

我尝试转换Objective-C示例项目，以了解如何在他们的网站上创建自定义uiimagepickercontroller到Swift。我不确定我做错了什么，这是我的代码：

func showImagePickerForSourceType(sourceType: UIImagePickerControllerSourceType) {
    let picker = UIImagePickerController()
    picker.modalPresentationStyle = UIModalPresentationStyle.CurrentContext
    picker.sourceType = sourceType
    picker.delegate = self

    if sourceType == UIImagePickerControllerSourceType.Camera {
        //gets rid of the out of the box imagepicker
        picker.showsCameraControls = false

        //loads the overlay xib for the camera
        NSBundle.mainBundle().loadNibNamed("OverlayView", owner: self, options: nil)
        self.overlayView.frame = (picker.cameraOverlayView?.frame)!
        picker.cameraOverlayView = self.overlayView
        self.overlayView = nil

        //makes the image capture screen the full screen size
        let screenSize: CGSize = UIScreen.mainScreen().bounds.size
        let cameraAspectRatio: Float = 4.0 / 3.0
        let imageWidth:Float = floorf(Float(screenSize.width) * cameraAspectRatio)
        let scale: Float = ceilf((Float(screenSize.height + 120) / imageWidth) * 10.0) / 10.0
        picker.cameraViewTransform = CGAffineTransformMakeScale(CGFloat(scale), CGFloat(scale))

    }
    self.imagePickerController = picker
    self.presentViewController(self.imagePickerController, animated: true, completion: nil)
}

以下是xib上关闭视图的按钮的代码。我怎样才能解决这个问题？因为我打印出导航堆栈上的视图控制器数组，它只显示一个。

    @IBAction func goBack(sender: AnyObject) {
    self.imagePickerController.dismissViewControllerAnimated(true, completion: nil)
}

Answer 1

听起来您的视图控制器的view插座已连接到.xib文件中的视图以及overlayView插座。这可能会导致你所描述的内容。

如何在呈现之后摆脱xib？

1 个答案: