Swift中自定义log

func XJLog(message:T,file : String = #file, funName : String = #function, lineNum : Int = #line){

#if DEBUG

let fileName = (file as NSString).lastPathComponent

print("文件名:\(fileName)--函数:\(funName)--行数:\(lineNum)----\(message)")

#endif

}

会得到详细打印:

文件名:ViewController.swift--函数:viewDidLoad()--行数:46----hahaha