創(chuàng)建CacheManager 管理文件緩存

1.0 提供readCacheSize()和cleanCache()方法分別為讀取和清除文件緩存

readCacheSize()讀取緩存

static func readCacheSize()->String {
        return String(format: "%.2f",forderSizeByDocumentPath(NSHomeDirectory()))
    }

2.1 forderSizeByDocumentPath()遍歷所有子目錄 并計(jì)算文件大小

 static func forderSizeByDocumentPath(forderPath: String) -> Double {
        let manage = NSFileManager.defaultManager()
        if !manage.fileExistsAtPath(forderPath) {
            print("文件不存在")
        }
        let subFilePath = manage.subpathsAtPath(forderPath)!
        var fileSize:Double = 0
        for path in subFilePath {
            let fileAbsoluePath = forderPath + "/" + path
            fileSize += retureFileSize(fileAbsoluePath)
        }
        return fileSize
    }

2.2 retureFileSize()計(jì)算單個(gè)文件大小

static func retureFileSize(path:String)-> Double{
        let manage = NSFileManager.defaultManager()
        var fileSize: Double = 0.0
        do{
            fileSize = try manage.attributesOfItemAtPath(path)["NSFileSize"] as! Double
        }catch{
            print("未知錯(cuò)誤")
        }
        return fileSize/1024/1024
    }

cleanCache()清除緩存

static func cleanCache(competion:()->Void){
        CacheManager.deleteFolder(NSHomeDirectory()+"/Documents")
        CacheManager.deleteFolder(NSHomeDirectory()+"/Library")
        CacheManager.deleteFolder(NSHomeDirectory()+"/tmp")
        competion()
    }

3.1 deleteFolder()刪除文件夾下的所有文件

static func deleteFolder(folderPath:String){
        let manage = NSFileManager.defaultManager()
        if !manage.fileExistsAtPath(folderPath) {
        }
        let childFilePath = manage.subpathsAtPath(folderPath)
        for path in childFilePath!{
            let fileAbsoluePath = folderPath+"/"+path
            CacheManager.deleteFile(fileAbsoluePath)
        }
    }

3.2 deleteFile()刪除單個(gè)文件

static func deleteFile(path:String){
        let manage = NSFileManager.defaultManager()
        do{
            try manage.removeItemAtPath(path)
        }catch{
            
        }
    }

結(jié)語

項(xiàng)目鏈接：文件緩存