App获取缓存大小和清除缓存

1.app获取缓存大小

func getCacheFileSize() -> String{
    var foldSize:UInt64 = 0
    let filePath:String = NSSearchPathForDirectoriesInDomains(.cachesDirectory, .userDomainMask, true).first ?? ""
    if let files = FileManager.default.subpaths(atPath: filePath){
        for path in files{
            let temPath:String = filePath + "/" + path
            let folder = try? FileManager.default.attributesOfItem(atPath: temPath) as NSDictionary
            if let c = folder?.fileSize(){
                foldSize += c
            }
        }
    }
    if foldSize > 1024 * 1024{
        return String.init(format: "%.2f", Double(foldSize)/1024.0/1024.0) + "MB"
    }
    else if foldSize > 1024{
        return String.init(format: "%.2f", Double(foldSize)/1024.0) + "KB"
    }else{
        return String(foldSize) + "B"
    }
}

2.清除缓存

 func clearFileCache(){
    let filePath:String = NSSearchPathForDirectoriesInDomains(.cachesDirectory, .userDomainMask, true).first ?? ""
    if let files = FileManager.default.subpaths(atPath: filePath){
        for path in files{
            let temPath:String = filePath + "/" + path
            if FileManager.default.fileExists(atPath: temPath){
                try? FileManager.default.removeItem(atPath: temPath)
            }
        }
    }
}