Swift获取沙盒中目录的一个分类

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1.分类代码：

////  String+Category.swiftimport UIKitextension String{    /**     将当前字符串拼接到cache目录后面     */    func cacheDir() -> String{        let path = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.CachesDirectory, NSSearchPathDomainMask.UserDomainMask, true).last!        return (path as NSString).stringByAppendingPathComponent((self as NSString).lastPathComponent)    }    /**     将当前字符串拼接到doc目录后面     */    func docDir() -> String{        let path = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true).last!        return (path as NSString).stringByAppendingPathComponent((self as NSString).lastPathComponent)    }    /**     将当前字符串拼接到tmp目录后面     */    func tmpDir() -> String{        let path = NSTemporaryDirectory() as NSString        return path.stringByAppendingPathComponent((self as NSString).lastPathComponent)    }}

2.应用

/*         原本：         let path = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.CachesDirectory, NSSearchPathDomainMask.UserDomainMask, true).last!         let filePath = (path as NSString).stringByAppendingPathComponent("account.plist")         */        let filePath = "account.plist".cacheDir()

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