stringByAppendingPathComponent不可用

Question

我的应用程序在Instagram上分享照片，为此，首先将其保存在临时目录中：let writePath = NSTemporaryDirectory().stringByAppendingPathComponent("instagram.igo")它正在努力Swift 1.2，但不起作用Swift 2.0。给出错误消息是：stringByAppendingPathComponent不可用：改为使用NSURL上的URLByAppendingPathComponent。

Answer 1

看起来stringByAppendingPathComponent在Swift 2.0中删除了该方法，因此错误消息建议使用：

let writePath = NSURL(fileURLWithPath: NSTemporaryDirectory()).URLByAppendingPathComponent("instagram.igo")

更新：

URLByAppendingPathComponent()已取而代之的appendingPathComponent()是：

let writePath = NSURL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("instagram.igo")

Answer 2

它正在工作，NSString你可以像这样使用它：

extension String {

    func stringByAppendingPathComponent(path: String) -> String {

        let nsSt = self as NSString

        return nsSt.stringByAppendingPathComponent(path)

    }

}

现在您可以使用此扩展程序将您转换String为NSString第一个然后执行操作。

你的代码将是：

let writePath = NSTemporaryDirectory().stringByAppendingPathComponent("instagram.igo")

这是另一种使用方法：

extension String {  

    var lastPathComponent: String {  

        return (self as NSString).lastPathComponent  

    }  

    var pathExtension: String {  

        return (self as NSString).pathExtension  

    }  

    var stringByDeletingLastPathComponent: String {  

        return (self as NSString).stringByDeletingLastPathComponent  

    }  

    var stringByDeletingPathExtension: String {  

        return (self as NSString).stringByDeletingPathExtension  

    }  

    var pathComponents: [String] {  

        return (self as NSString).pathComponents  

    }  

    func stringByAppendingPathComponent(path: String) -> String {  

        let nsSt = self as NSString  

        return nsSt.stringByAppendingPathComponent(path)  

    }  

    func stringByAppendingPathExtension(ext: String) -> String? {  

        let nsSt = self as NSString  

        return nsSt.stringByAppendingPathExtension(ext)  

    }  

}

来自HERE的参考资料。

对于swift 3.0：

extension String {

    func stringByAppendingPathComponent1(path: String) -> String {

        let nsSt = self as NSString

        return nsSt.appendingPathComponent(path)

    }

}

let writePath = NSTemporaryDirectory().stringByAppendingPathComponent(path: "instagram.igo")

extension String {

    var lastPathComponent: String {

        return (self as NSString).lastPathComponent

    }

    var pathExtension: String {

        return (self as NSString).pathExtension

    }

    var stringByDeletingLastPathComponent: String {

        return (self as NSString).deletingLastPathComponent

    }

    var stringByDeletingPathExtension: String {

        return (self as NSString).deletingPathExtension

    }

    var pathComponents: [String] {

        return (self as NSString).pathComponents

    }

    func stringByAppendingPathComponent(path: String) -> String {

        let nsSt = self as NSString

        return nsSt.appendingPathComponent(path)

    }

    func stringByAppendingPathExtension(ext: String) -> String? {

        let nsSt = self as NSString

        return nsSt.appendingPathExtension(ext)

    }

}