如何在Swift中将此var字符串转换为URL [英] How to convert this var string to URL in Swift

问题描述

我需要url文件路径为 URL (在旧版Swift中为NSURL).我有这个:

I need url filepath be a URL (NSURL in old versions of Swift). I have this:

let paths = NSSearchPathForDirectoriesInDomains(
        .documentDirectory, .userDomainMask, true)

// NSString *documentsDirectory = [paths objectAtIndex:0];
let documentsDirectory = paths[0] as String

var filePath:String? = nil
var fileNamePostfix = 0
repeat {
    filePath =
    "\(documentsDirectory)/\(dateTimePrefix)-\(fileNamePostfix).mp4"
    fileNamePostfix += 1
} while (FileManager.default.fileExists(atPath: filePath))

我需要将其转换为URL，以便在self.fileOutput.startRecording(to: <#outputFileURL: URL?#>, recordingDelegate: <#AVCaptureFileOutputRecordingDelegate?#>)方法中使用.

I need to convert this to URL for use in self.fileOutput.startRecording(to: <#outputFileURL: URL?#>, recordingDelegate: <#AVCaptureFileOutputRecordingDelegate?#>) method.

我尝试了filePath as? URL()，但这是不正确的.

I tried filePath as? URL() but it isn't correct.

推荐答案

您需要这样做:

let fileUrl = URL(string: filePath)

或

let fileUrl = URL(fileURLWithPath: filePath)

取决于您的需求.请参见 URL文档

depending on your needs. See URL docs

在Swift 3之前，URL被称为NSURL.

Before Swift 3, URL was called NSURL.

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