////  XCache.swift//  UITablViewTest////  Created by Marcio on 2017/2/14.//  Copyright © 2017年 Marcio. All rights reserved.//import UIKitclass XCache: NSObject {        /**     * 读取缓存大小     */    static func returnCacheSize() -> String {        return String(format: "%.2f",XCache.forderSizeAtPath(folderPath: NSHomeDirectory()))    }        /**     * 清除缓存 自己决定清除缓存的位置     */    static func cleanCache(competion:()->Void) {        XCache.deleteFolder(path: NSHomeDirectory() + "/Documents")        XCache.deleteFolder(path: NSHomeDirectory() + "/Library")        XCache.deleteFolder(path: NSHomeDirectory() + "/tmp")        competion()    }    /**     * 删除单个文件     */    static func deleteFile(path: String) {        let manage = FileManager.default        do {            try manage.removeItem(atPath: path)        } catch {                    }    }        static func deleteFolder(path: String) {        let manage = FileManager.default        if !manage.fileExists(atPath: path) {        }        let childFilePath = manage.subpaths(atPath: path)        for path_1 in childFilePath! {            let fileAbsoluePath = path+"/"+path_1            XCache.deleteFile(path: fileAbsoluePath)        }    }        /**     * 计算单个文件的大小     */    static func returnFileSize(path:String) -> Double {        let manager = FileManager.default        var fileSize:Double = 0        do {            let attr = try manager.attributesOfItem(atPath: path)            fileSize = Double(attr[FileAttributeKey.size] as! UInt64)            let dict = attr as NSDictionary            fileSize = Double(dict.fileSize())        } catch {            dump(error)        }        return fileSize/1024/1024    }        /**     * 遍历所有子目录， 并计算文件大小     */    static func forderSizeAtPath(folderPath:String) -> Double {        let manage = FileManager.default        if !manage.fileExists(atPath: folderPath) {            return 0        }        let childFilePath = manage.subpaths(atPath: folderPath)        var fileSize:Double = 0        for path in childFilePath! {            let fileAbsoluePath = folderPath+"/"+path            fileSize += XCache.returnFileSize(path: fileAbsoluePath)        }        return fileSize    }}