在Swift 3中获取GCD标签
我有一些代码获取当前GCD队列的标签用于日志记录目的，在Swift 2中如下所示：
if let queueName = String(UTF8String: dispatch_queue_get_label(DISPATCH_CURRENT_QUEUE_LABEL)) where !queueName.isEmpty { detailedMessage += "[" + queueName + "] " } 在Xcode 8将其转换为Swift 3后，它看起来像这样：
if let queueName = String(validatingUTF8: DISPATCH_CURRENT_QUEUE_LABEL.label), !queueName.IsEmpty { detailedMessage += "[" + queueName + "] " }
但是，当我构建时，Xcode会给我以下错误：
元组类型’（）’的值没有成员’标签’
我还没有找到任何方法来获取Swift 3中的当前队列标签。有人可以帮忙吗？
谢谢，
大卫
UPDATED这是上下文的function：
public func log(_ message: String, tag: String, level: Logger.LogLevel, userInfo: [String : String]?, functionName: StaticString, fileName: StaticString, lineNumber: Int) { var detailedMessage = "" let formattedDate = self._dateFormatter.string(from: Date()) detailedMessage += "\(formattedDate) " detailedMessage += "[\(level.description)] " if Thread.isMainThread { detailedMessage += "[main] " } else { if let threadName = Thread.current.name , !threadName.isEmpty { detailedMessage += "[" + threadName + "] " } else if let queueName = String(validatingUTF8: DISPATCH_CURRENT_QUEUE_LABEL.label) , !queueName.isEmpty { detailedMessage += "[" + queueName + "] " } else { detailedMessage += "[" + String(format:"%p", Thread.current) + "] " } } let lastPathComponent = NSString(stringLiteral: fileName).lastPathComponent detailedMessage += "[" + lastPathComponent + ":" + String(lineNumber) + "] " detailedMessage += "\(functionName) " let fullMessage = self.messageWithTag(tag, message: message) detailedMessage += "> \(fullMessage)" NSLog("\(fullMessage)") }
您可以使用该方法
let cName = __dispatch_queue_get_label(nil) let name = String(cString: cName, encoding: .utf8)