自定义打印

一般我们需要在Appdelegate中定义全局函数

func XLog<T>(_ message:T,file:String=#file,funcName:String=#function,lineNum:Int=#line){
    #if DEBUG
    let fileName = (file as NSString).lastPathComponent
    print("\(fileName) \(funcName) line:\(lineNum) \n\(message)")
    #endif
}