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我有一个“更新”函数,其中没有执行结束,然后我使用函数“Console.WriteLine”来知道函数在哪里被中断。这是 Udate 函数:

async Task Update()
    {
        count++;
        try
        {
            List<string> cmds = new List<string>();
            if (Ev3Messaging.IsConnected())
            {
                Tuple<string, string> response = null;
                Console.WriteLine("Test1"); // Displayed
                try
                {
                    response = await Ev3Messaging.ReceiveText(true);
                }
                catch(Exception ex)
                {
                    Console.WriteLine(ex.Source + ": " + ex.Message); // Not displayed
                }
                Console.WriteLine("Test2"); // Not displayed
                while (response != null)
                {
                    Console.WriteLine("Test2: " + response.Item2);
                    string[] list = response.Item2.Split(';');
                    foreach (string cmd in list)
                        cmds.Add(cmd);
                    response = await Ev3Messaging.ReceiveText(false);
                }
            }
            Canvas canvas = _screenSV.Holder.LockCanvas();
            if (canvas != null)
            {
                foreach (string cmd in cmds)
                    ExecuteCommand(cmd, canvas);
                _screenSV.Holder.UnlockCanvasAndPost(canvas);
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Source + ": " + ex.Message);
        }
    }

以下代码每 100 毫秒调用一次更新函数:

var timer = new System.Threading.Timer((e) =>
        {
            RunOnUiThread(async () => await Update());
        }, null, 0, 100);

它显示“Test1”,但既不显示异常(“EV3Messaging.ReceiveText”函数中没有问题),也不显示“Test2”(函数在到达“ShowAlert("Test2");"之前中断)

这怎么可能 ?

如果您希望我发布“Ev3Messaging.ReceiveText”功能,请询问我。我没有发布它,因为它足够大,我只是想知道如何解决这个问题......

提前致谢。

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0 回答 0