swift 获取文件的Md5值

获取文件的Md5值的方法如下

func md5File(url: URL) -> String? { let bufferSize = 1024 * 1024 do { //打开文件 let file = try FileHandle(forReadingFrom: url) defer { file.closeFile() } //初始化内容 var context = CC_MD5_CTX() CC_MD5_Init(&context) //读取文件信息 while case let data = file.readData(ofLength: bufferSize), data.count > 0 { data.withUnsafeBytes { _ = CC_MD5_Update(&context, $0, CC_LONG(data.count)) } } //计算Md5摘要 var digest = Data(count: Int(CC_MD5_DIGEST_LENGTH)) digest.withUnsafeMutableBytes { _ = CC_MD5_Final($0, &context) } return digest.map { String(format: "hhx", $0) }.joined() } catch { print("Cannot open file:", error.localizedDescription) return nil } }

不合理的地方请指正 备份：http://www.jianshu.com/p/28f4f34a21d9

转载于:https://www.cnblogs.com/kunH/p/7234915.html

相关资源：swift-YZYMD5用Swift编程语言编写用来计算文本和文件的MD5值