Swift：如何使用带有按钮

Question

在我的应用中，我正在开发一个自定义UIPickerView来拍照。在this教程之后，我创建了一个与其.xib子类关联的UIView文件。我在以下屏幕截图中得到了结果：

正如你所看到的，＆＃34;空间＆＃34;插入按钮和其他东西完全在底部，而我想将它分成两个条，如默认模式：

这样我就可以添加＆＃34;取消＆＃34;按钮广告左上角。 我该怎么办？这是我的代码：

self.imagePicker =  UIImagePickerController()
self.imagePicker.delegate = self
self.imagePicker.sourceType = .Camera
self.imagePicker.cameraCaptureMode = .Photo
self.imagePicker.showsCameraControls = false
self.imagePicker.modalPresentationStyle = .FullScreen

//customView stuff
let customViewController = CustomOverlayViewController(
    nibName:"CustomOverlayViewController",
    bundle: nil
)
let customView:CustomOverlayView = customViewController.view as! CustomOverlayView
customView.frame = self.imagePicker.view.frame

presentViewController(imagePicker, animated: true, completion: {
    self.imagePicker.cameraOverlayView = customView
})