I was writing a sample for showing off some advanced features in Monotouch with the UITableView. Specifically, I was showing off how to scale a UITableViewCell based on the content within the cell. One of the items in the cell was a UIImage who's content is being pulled from the Internet. I was doing this all synchronously. Unfortunately, the sliding of the table was a little herky/jerky due to the synchronicity of the image download. I knew I needed to pull this out of the UI thread and perform this on background thread. By using the threadpool, the problem has been resolved. Here's what I did:
public string TwitterImage{
set {
ThreadPool.QueueUserWorkItem(new WaitCallback(SetTwitterImage), value);
}
}
private void SetTwitterImage(object state)
{
var img = Convert.ToString(state);
NSUrl nsUrl = new NSUrl(img);
NSData data = NSData.FromUrl(nsUrl);
InvokeOnMainThread(delegate{
uitvccImage.Image = new UIImage(data);
});
}
Read more: More Wally - Wallace B. McClure
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