Swift的打印输出

代码来自王巍的Swifter Tips

func printLog<T>(_ message: T,
              file: String = #file,
              method: String = #function,
              line: Int = #line)
{
    #if DEBUG
        print("\((file as NSString).lastPathComponent) \(method) \(line) : \(message) ")
    #endif
}