It seems the followings don't work for me.
cell.asyncImageView.image = [UIImage imageNamed:@"avatar.png"];
cell.asyncImageView.showActivityIndicator = YES;
[cell.asyncImageView setImageURL: url];
or
cell.asyncImageView.showActivityIndicator = YES;
cell.asyncImageView.image = [UIImage imageNamed:@"avatar.png"];
[cell.asyncImageView setImageURL: url];
Any suggestions? Thanks.