swift封装打印函数

let dateFormatter = DateFormatter()

//日志打印
func DLog<T>(_ message:T, file:String = #file, function:String = #function, line:Int = #line) {
    #if DEBUG
    
    //获取文件名
    let fileName = (file as NSString).lastPathComponent
    
    // 为日期格式器设置格式字符串
    dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss.SSS"
    // 使用日期格式器格式化当前日期、时间
    let datestr = dateFormatter.string(from: Date())

    //日志内容
    let consoleStr = "\(datestr) [\(fileName):\(line)][\(function)]\(message)"
    
    //打印日志内容
    print(consoleStr)
    
    #endif
}

打印对象地址

extension String {
    static func pointer(_ object: AnyObject?) -> String {
        guard let object = object else { return "nil" }
        let opaque: UnsafeMutableRawPointer = Unmanaged.passUnretained(object).toOpaque()
        return String(describing: opaque)
    }
}

使用

1 2	DLog(self) DLog("self p:\(Unmanaged.passUnretained(self).toOpaque())")

打印如下:

1 2	2019-02-27 11:58:57.378 [ViewController.swift:30][viewDidAppear]<demo.ViewController: 0x1059c2170> 2019-02-27 11:58:57.383 [ViewController.swift:31][viewDidAppear]self p:0x00000001059c2170

不过还是推荐Swift - 日志框架XCGLogger的使用详解