public void UpdateCell(SampleRowModel model)
{
int tagForRequest = Tag;
ImageView.Image = UIImage.FromBundle("loading_1");
ImageView.Layer.AddAnimation(AnimationHelpers.GetSpinAnimation(), RotationAnimationKey);
TextLabel.Text = model.Description;
GetImageAsync(model.ImageUrl).ContinueWith(task => {
InvokeOnMainThread(() => {
// Scrolling up and down will spin up multiple requests for the same recycled cell object.
// Make sure we only load the one appropriate for the currently displayed data.
// NOTE: This would be a good place to implement a limited-concurrency request queue.
// NOTE: This would be a good place to implement request cancellation, too.
int currentTag = Tag;
if (currentTag == tagForRequest)
{
// Remove the spinning animation (hilarious if you don't).
ImageView.Layer.RemoveAnimation(RotationAnimationKey);
UIImage result = task.Result;
if (result != null)
{
// Only showing an image if one came back successfully.
ImageView.Image = result;
}
}
});
});
}
public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
{
SampleRowModel model = rows[indexPath.Row];
SampleTableCell cell = (SampleTableCell)tableView.DequeueReusableCell(cellKey);
if (cell == null)
{
cell = new SampleTableCell(cellKey);
}
cell.Tag = indexPath.Row;
cell.UpdateCell(model);
return(cell);
}
public void UpdateCell(SampleRowModel model)
{
int tagForRequest = Tag;
ImageView.Image = UIImage.FromBundle("loading_1");
ImageView.Layer.AddAnimation(AnimationHelpers.GetSpinAnimation(), RotationAnimationKey);
TextLabel.Text = model.Description;
GetImageAsync(model.ImageUrl).ContinueWith(task => {
InvokeOnMainThread(() => {
// Scrolling up and down will spin up multiple requests for the same recycled cell object.
// Make sure we only load the one appropriate for the currently displayed data.
// NOTE: This would be a good place to implement a limited-concurrency request queue.
// NOTE: This would be a good place to implement request cancellation, too.
int currentTag = Tag;
if (currentTag == tagForRequest) {
// Remove the spinning animation (hilarious if you don't).
ImageView.Layer.RemoveAnimation(RotationAnimationKey);
UIImage result = task.Result;
if (result != null) {
// Only showing an image if one came back successfully.
ImageView.Image = result;
}
}
});
});
}