无法使用类型为((fileURLWithPath:NSURL)'的参数列表来调用类型为'NSURL'的初始化程序 [英] Cannot invoke initializer for type 'NSURL' with an argument list of type '(fileURLWithPath: NSURL)'

问题描述

我为Swift 2升级了代码，但出现错误:

I upgraded my code for Swift 2, here I got an error:

无法使用类型为(fileURLWithPath: NSURL)

这是代码:

    let dirPaths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)
    let docsDir = dirPaths[0] 
    let soundFilePath = NSURL(fileURLWithPath: docsDir).URLByAppendingPathComponent("sound.caf")
    let soundFileURL = NSURL(fileURLWithPath: soundFilePath)
    //The error goes here. 

推荐答案

fileURLWithPath的语法:

public init(fileURLWithPath path: String)

这意味着它仅接受String作为参数.并且您将NSURL作为参数传递.

Which means it only accept String as argument. And you are passing NSURL as an argument.

您可以通过以下方式解决它:

And you can solve it this way:

let dirPaths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)
let docsDir = dirPaths[0]
let soundFilePath = (docsDir as NSString).stringByAppendingPathComponent("sound.caf")
let soundFileURL = NSURL(fileURLWithPath: soundFilePath)

如果要使用，这是扩展名:

And here is extension if you want to use:

extension String {

    func stringByAppendingPathComponent(path: String) -> String {

        return (self as NSString).stringByAppendingPathComponent(path)
    }
}

您可以通过以下方式使用它:

And you can use it this way:

let soundFilePath = docsDir.stringByAppendingPathComponent("sound.caf")
let soundFileURL = NSURL(fileURLWithPath: soundFilePath)

这篇关于无法使用类型为((fileURLWithPath:NSURL)'的参数列表来调用类型为'NSURL'的初始化程序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！