Question

我想将每个print（）内容写入Swift 3.0中的文本文件中。它在Objective-C中运行良好，但在Swift 3.0中无效。我使用的代码如下，

    func redirectLogToDocuments() {

    let docDirectory: NSString = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)[0] as NSString
    let logpath = docDirectory.appendingPathComponent("Logfile.txt")

    freopen(logpath.cString(using: String.Encoding.utf8)!, "a+", stdin)
    freopen(logpath.cString(using: String.Encoding.utf8)!, "a+", stdout)
    freopen(logpath.cString(using: String.Encoding.utf8)!, "a+", stderr)                
}

请帮帮我。

Answer 1

 func redirectLogToDocuments() {
    let allPaths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
    let documentsDirectory = allPaths.first!
    let pathStringComponent = "/" + LoggingConstants.LogFileName + "." + LoggingConstants.LogFileType
    let pathForLog = (documentsDirectory as NSString).appending(pathStringComponent)
    freopen(pathForLog.cString(using: String.Encoding.ascii)!, "a+", stderr)
}

在didFinishLaunching（）中使用上述方法，然后使用NSLog（）语句而不是print（），您将获得所需的内容。

使用不使用Swift的freopen将日志内容写入文本文件

1 个答案: