ios - 摄像头下方有一个黑色的底部空间

Question

我从 UITabBarController 呈现一个 UIImagePickerController。

        let imagePicker = UIImagePickerController()
        imagePicker.delegate = self
        imagePicker.sourceType = .Camera
        imagePicker.allowsEditing = false
        imagePicker.showsCameraControls = false

        presentViewController(imagePicker, animated: true, completion: nil)

我已明确将 showsCameraControls 设置为 false 以将我的自定义叠加 View 放在相机顶部。但是为什么底部有一个黑色区域？有什么帮助吗？

Answer 1

相机宽高比是4:3，你必须应用变换比例才能全屏

swift

let screenSize = UIScreen.mainScreen().bounds.size
let aspectRatio:CGFloat = 4.0/3.0
let scale = screenSize.height/screenSize.width * aspectRatio
self.imagePikerViewController.cameraViewTransform = CGAffineTransformMakeScale(scale, scale);

屏幕截图

objective-c

CGSize screenSize = [[UIScreen mainScreen] bounds].size;
float aspectRatio = 4.0/3.0;
float scale = screenSize.height/screenSize.width * aspectRatio;
self.imagePikerViewController.cameraViewTransform = CGAffineTransformMakeScale(scale, scale);