iOS日誌打印存貯到txt文件及沙盒文件操作

在我們開發中過程中有時候會有這樣的場景，需要脫離連線調試代碼，但是又看不見控制檯的Log,所以將Log存到文本中，調試過程全部記錄下來，隨時可以看。

存貯：

class func logWithTag(_ tag:String){
        if logMode {
            print(tag)
            //將數據寫入log中，
            let dataLogPath = NSHomeDirectory() + "/Documents/logData.txt"
            let fileM = FileManager()
            if !fileM.fileExists(atPath: dataLogPath) {
                try! ("" as NSString).write(toFile: dataLogPath, atomically: true, encoding: String.Encoding.utf8.rawValue)
            }
            let dataLog = try! NSMutableString(contentsOfFile: dataLogPath, encoding: String.Encoding.utf8.rawValue)
            let formatter = DateFormatter()
            formatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
            let dateStr = formatter.string(from: Date())
            let line = dateStr + " :" + tag + "   \n"
            dataLog.append(line)
            try! dataLog.write(toFile: dataLogPath, atomically: true, encoding: String.Encoding.utf8.rawValue)
            
        }
    }

讀取：

        let dataLogPath = NSHomeDirectory() + "/Documents/logData.txt"
        let fileM = FileManager()
        if !fileM.fileExists(atPath: dataLogPath) {
            try! ("" as NSString).write(toFile: dataLogPath, atomically: true, encoding: String.Encoding.utf8.rawValue)
        }
        let dataLog = try! NSMutableString(contentsOfFile: dataLogPath, encoding: String.Encoding.utf8.rawValue)
        self.logTV.text = dataLog as String

 

下面是demo：Demo代碼，原創請在github給個小星星,謝謝