有谁知道 phone 屏幕顶部与相机图像预览开始之间的像素距离？

Question

我正在尝试构建自定义相机叠加层，需要知道拍照时图像预览上方黑色工具栏的高度。有人知道吗？下图：

Answer 1

您可以通过记录感兴趣的视图层次来找到问题的答案。

制作一个递归视图日志记录函数，类似...

    func logsubviews(view: UIView, indent: Int)->Void {
             //indenting
            var indent = indent + 1
            var indentString = ""
            for i in 0..<indent {
                indentString = " \(indentString)"
            }
            //logging
            println("\(indentString) \(view)")
            for subview in view.subviews {
                self.logsubviews(subview as UIView, indent: indent)
            }
        }

然后在呈现 imagePicker 的视图层次结构后记录它：

@IBAction func invokeImagePicker(sender: AnyObject) {
        let imagePicker =  UIImagePickerController()
        imagePicker.sourceType = .Camera
        imagePicker.delegate = self
        self.presentViewController(imagePicker, animated: true, completion:{
            ()->Void in
            self.logsubviews(imagePicker.view, indent: 0)
        })
    }

您将获得 imagePickerController 的视图及其各自框架的精美打印输出。

有谁知道 phone 屏幕顶部与相机图像预览开始之间的像素距离？

Does anyone know the distance in pixels between the top of the phone screen to the start of the image preview in the camera?

xcode

uiimagepickercontroller

ios