如何将视频（在图库中）转换为NSData？在斯威夫特 [英] How to convert video (in gallery) to NSData? in Swift

问题描述

我在Swift imagePickerController中没有info所以我不知道如何获取url并将其转换为数据以发送到Web服务。

I just haven't "info" in Swift imagePickerController so I don't know how get url and convert it to data to send to web-service.

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {

  var videoDataURL = info[UIImagePickerControllerMediaURL] as! NSURL!
  var videoFileURL = videoDataURL.filePathURL
  var video = NSData.dataWithContentsOfMappedFile("\(videoDataURL)")
}

推荐答案

Xcode 8.3•Swift 3.1

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String: Any]) {
    let documentsDirectoryURL =  FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
    if let fileURL =  info[UIImagePickerControllerMediaURL] as? URL {
        do {
            try  FileManager.default.moveItem(at: fileURL, to: documentsDirectoryURL.appendingPathComponent("videoName.mov")
            print("movie saved")
        } catch {
            print(error)
        }
    }
}

---

Swift 2

如果让我们解开您的期权，您应该使用。此外， NSData.dataWithContentsOfMappedFile 已被弃用iOS8。尝试使用NSData方法初始化程序contentsOfURL：

You should use if let to unwrap your optionals. Also NSData.dataWithContentsOfMappedFile was deprecated iOS8. Try using NSData method initializer contentsOfURL:

注意：您还需要更改来自 [NSObject：AnyObject] 的didFinishPickingMediaWithInfo声明到 [String：AnyObject]

Note: You need also to change the didFinishPickingMediaWithInfo declaration from [NSObject : AnyObject] to [String : AnyObject]

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
    if let fileURL = info[UIImagePickerControllerMediaURL] as? NSURL {
        if let videoData = NSData(contentsOfURL: fileURL) {
            print(videoData.length)
        }
    }
}

Rob提到的

数据可能非常大但不是复制文件，而是应该将文件移动到文档文件夹中，如下所示：

as mentioned by Rob the data can be really large but instead of copying the file you should move the file to the documents folder as follow:

let documentsDirectoryURL =  try! NSFileManager().URLForDirectory(.DocumentDirectory, inDomain: .UserDomainMask, appropriateForURL: nil, create: true)
if let fileURL =  info[UIImagePickerControllerMediaURL] as? NSURL {
    do {
        try  NSFileManagerdefaultManager().moveItemAtURL(fileURL, toURL: documentsDirectoryURL.URLByAppendingPathComponent("videoName").URLByAppendingPathExtension("mov"))
        print("movie saved")
    } catch {
        print(error)
    }
}

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