Question

我在使用Swift 3和Xcode 8.3（8E162）将数据写入iOS上的磁盘时遇到问题。所有运行iOS10.3的iPhone5，iPhone6 plus和iPhone7都经过测试，但无济于事。

在我的视图课程中，我声明：

var takePhoto: AVCapturePhotoOutput!

和一个叫做的IBAction：

takePhoto.capturePhoto(with: settings, delegate: self)

当触发IBAction（按钮点击）时，将调用capturePhoto()及其委托。我试图写出不起作用的文件。将图像添加到当前视图确实有效，因此我知道捕获的图像缓冲区很好。

func capture(_ captureOutput: AVCapturePhotoOutput, didFinishProcessingPhotoSampleBuffer photoSampleBuffer: CMSampleBuffer?, previewPhotoSampleBuffer: CMSampleBuffer?, resolvedSettings: AVCaptureResolvedPhotoSettings, bracketSettings: AVCaptureBracketedStillImageSettings?, error: Error?) {

    // Create file path using FileManager
    let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first
    let filename = documentsURL?.appendingPathComponent("photo.jpg")

    // Try write out the file
    do{
        let writeToFile = try dataImage.write(to: filename!, options: .atomic)
        print("WRITING out file", writeToFile)
    }
    catch {
        print("ERROR writing out file")
    }

    // Check if the file was created
    if FileManager.default.fileExists(atPath: (filename?.absoluteString)!) {
        print("YAY!  Image " + (filename?.absoluteString)! + " exists")
    }
    else {
        print("BOO!  The file doesn't exist: " + (filename?.absoluteString)!)
    }

    // Add the image to the current view
    let viewImage = UIImageView(frame: CGRect(x: 50, y: 50, width: 100, height: 100))
    viewImage.image = UIImage(data: dataImage)
    viewImage.contentMode = .scaleAspectFit
    self.view.addSubview(viewImage)
}

write()没有throw，fileExists失败

WRITING out file ()
BOO!  The file doesn't exist: 
file:///var/mobile/Containers/Data/Application/1E77951B-BEA5-48AD-ADD3-5DCB289A94C0/Documents/photo.jpg

我错过了什么？

无法使用Swift3写入iOS10.3上的Documents文件夹

0 个答案: