如何在 Monotouch Button TouchDown 事件处理程序中的 while 循环中休眠执行

Question

I tried Thread.Sleep(1000) in every iteration in cycle, but infoLabel.Text is not changed until end of cycle.It changes infoLabel.Text after calling Thread.Sleep 3 times. Please advice. Here's my code.

void Handle_Touchdown(object sender, EventArgs e)
{
 for(int i = 0; i < 10; ++i )
 {
    infoLabel.Text = i.ToStraing();
    Thread.Sleep(1000);
 }
}

Answer 1

You're probably better off implementing a NSTimer and incrementing a count. Possible code could look like:

void Handle_Touchdown(object sender, EventArgs e)
{
    NSTimer timer;
    int counter = 0;

    timer = NSTimer.CreateRepeatingScheduledTimer(1, delegate{
        if (counter != 10)
        {
            counter++;
            infoLabel.Text = i.ToString();
        }
        else
            timer.Invalidate() // stop the timer
    });
}