Xcode 7.1 beta:文件内容错误 [英] Xcode 7.1 beta: Content Of File Error

问题描述

我刚刚完成了我的 swift 应用程序的最后润色.但是在升级到 Beta 7 之后，它给了我ContentOfFile"字符串的错误.谁能帮我了解如何解决这个问题?

I had just finished the final touches to my swift app. But after upgrading to Beta 7 its giving me errors for the 'ContentOfFile' String. can anyone help me understand how I can go about fixing this please?

这是我的自动取款机.

//Reads the Text File
    if var path = NSBundle.mainBundle().pathForResource("Chapters", ofType: "txt"){

        //Reads the Text File into one Huge String
        var data = String(contentsOfFile:path, encoding: NSUTF8StringEncoding, error: nil)

            //sets String content of the Text File as an Array. With each string start at \n (new line)
            if var content = (data){

                //from the mass string of data from the text file, Each chapter content is seperated by #
                var Chapters: [String] = content.componentsSeparatedByString("@")

                //without removing index in the beginning there will be an extra element printed in the array.
                Chapters.removeAtIndex(0)

错误消息:无法使用类型为(contentsOfFile:String，编码:UInt，错误:NilLiteralConvertible)"的参数列表调用类型String"的初始化程序

Error Message: Cannot invoke initializer for type 'String' with an argument list of type '(contentsOfFile: String, encoding: UInt, error: NilLiteralConvertible)'

推荐答案

你需要实现 do try catch 错误处理.试试这个:

You need to implement do try catch error handling. Try like this:

编辑/更新:

Swift 3 或更高版本

if let fileURL = Bundle.main.url(forResource: "Chapters", withExtension: "txt") {
    do {
        let string = try String(contentsOf: fileURL, encoding: .utf8)
        var chapters = string.components(separatedBy: "@")
        chapters.removeFirst()
    } catch {
        print(error)
    }
}

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