swift 获取缓存 删除缓存

//获取APP缓存
    funcgetCacheSize()-> Double {
        // 取出cache文件夹目录
        let cachePath = NSSearchPathForDirectoriesInDomains(.cachesDirectory, .userDomainMask, true).first
        // 取出文件夹下所有文件数组
        let fileArr = FileManager.default.subpaths(atPath: cachePath!)
        //快速枚举出所有文件名 计算文件大小
        var size = 0
        for file in fileArr! {
            // 把文件名拼接到路径中
            let path = cachePath! + ("/\(file)")
            // 取出文件属性
            let floder = try! FileManager.default.attributesOfItem(atPath: path)
            // 用元组取出文件大小属性
            for (key, fileSize) in floder {
                // 累加文件大小
                if key == FileAttributeKey.size {
                    size += (fileSize asAnyObject).integerValue
                }
            }
        }
        let totalCache = Double(size) /1024.00/1024.00
        return totalCache
    }


     //删除APP缓存
     funcclearCache() {
        // 取出cache文件夹目录
        let cachePath = NSSearchPathForDirectoriesInDomains(.cachesDirectory, .userDomainMask, true).first
        let fileArr = FileManager.default.subpaths(atPath: cachePath!)
        // 遍历删除
        for file in fileArr! {
            let path = (cachePath! asNSString).appending("/\(file)")
            ifFileManager.default.fileExists(atPath: path) {
                do {
                    tryFileManager.default.removeItem(atPath: path)
                } catch {

                }
            }
        }
    }