如何在 iOS Swift 中从框架中关闭相机控制器?

Question

我已经在框架中实现了视觉文档扫描仪。调用摄像机视图控制器并捕获文档时。当保存按钮点击它应该关闭并返回视图控制器。

以下是框架中的代码：

public func showScanner(){
self.createTaskController()
//        let scannerViewController = VNDocumentCameraViewController()
//        scannerViewController.delegate = self
//        present(scannerViewController, animated: true)
print("Called Build")
}
private func createTaskController(){
let scannerViewController = VNDocumentCameraViewController()
scannerViewController.delegate = self
self.clientView?.addChild(scannerViewController)
self.clientView?.view.addSubview(scannerViewController.view)
scannerViewController.didMove(toParent: clientView)
scannerViewController.dismiss(animated: true)
}
public func imageFromFile(result: @escaping (_ image: UIImage?) -> Void){
//the image
if imageNew != nil { 
result(imageNew)
}
else{
//callback nil so the app does not pause infinitely if
//the error != nil
result(nil)
}
}
public func documentCameraViewController(_ controller: VNDocumentCameraViewController, didFinishWith scan: VNDocumentCameraScan) {
guard scan.pageCount >= 1 else {
controller.dismiss(animated: true)
return
}
let originalImage = scan.imageOfPage(at: 0)
let newImage = compressedImage(originalImage)
imageNew = newImage
print("new image::(newImage.size)")
print("new imagei::(newImage)")
controller.dismiss(animated: true)
}
public func documentCameraViewController(_ controller: VNDocumentCameraViewController, didFailWithError error: Error) {
print(error)
controller.dismiss(animated: true)
}
public func documentCameraViewControllerDidCancel(_ controller: VNDocumentCameraViewController) {
controller.dismiss(animated: true)
}
func compressedImage(_ originalImage: UIImage) -> UIImage {
guard let imageData = originalImage.jpegData(compressionQuality: 1),
let reloadedImage = UIImage(data: imageData) else {
return originalImage
}
return reloadedImage
}

这是我在示例项目中调用框架的代码：

@IBAction func btnAction(_ sender: Any) {
A8Scan(self).showScanner()
p()
}

我的问题是，当点击保存按钮时，它应该关闭相机控制器(VNDocumentCameraViewController(并返回示例应用程序。但是，就我而言，它不会返回。

任何帮助非常感谢...

Answer 1

你在这里把它作为一个孩子添加

let scannerViewController = VNDocumentCameraViewController()
private func createTaskController(){
scannerViewController.delegate = self
self.clientView?.addChild(scannerViewController)
self.clientView?.view.addSubview(scannerViewController.view)
scannerViewController.didMove(toParent: clientView)
///    scannerViewController.dismiss(animated: true) remove this line
}

然后删除执行

scannerViewController.removeFromParent()
scannerViewController.view.removeFromSuperView()

---

或

private func createTaskController(){ 
let scannerViewController = VNDocumentCameraViewController()
scannerViewController.delegate = self  
self.clientView?.present(scannerViewController,animated:true,completion:nil)
}

解雇

controller.dismiss(animated: true)

---

要发送图像，请在客户端视图中创建一个函数并调用它

let newImage = compressedImage(originalImage)
self.clientView?.sendImage(newImage)