Question

我在C＃中使用SFML和Xamarin Studio在我的Mac上编写一个记录音频输入麦克风的应用程序。看一下代码：

using System;
using Gtk;
using SFML;
using SFML.Audio;
using SFML.System;

public partial class MainWindow: Gtk.Window
{
    public MainWindow () : base (Gtk.WindowType.Toplevel)
    {
        Build ();
    }

    protected void OnDeleteEvent (object sender, DeleteEventArgs a)
    {
        Application.Quit ();
        a.RetVal = true;
    }

    static SoundBufferRecorder recorder;


    protected void OnButton2Clicked (object sender, EventArgs e)
    {
        recorder.Start (44110);
    }

    protected void OnButton3Clicked (object sender, EventArgs e)
    {
        recorder.Stop ();
        SoundBuffer sf = recorder.SoundBuffer;
        sf.SaveToFile ("audio.mp3");
    }

    protected void OnButton1Clicked (object sender, EventArgs e)
    {
        Sound sound = new Sound (recorder.SoundBuffer);
        sound.Play ();
    }
}

当我点击OnButton3Clicked时...我的应用程序在没有任何理由的情况下崩溃，为什么？

Answer 1

你从未真正实例化你的录音机：

static SoundBufferRecorder recorder;

这意味着记录器为null，您将获得“未设置为实例的对象” - 错误。

static SoundBufferRecorder recorder = new SoundBufferRecorder();

我的SFML应用程序崩溃了？

1 个答案: