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POHow to prevent dequeue-ing a visible cell in GMGridView
 

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  1. POHow to prevent dequeue-ing a visible cell in GMGridView
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    <p>I'm using <a href="https://github.com/gmoledina/GMGridView" rel="nofollow">GMGridView</a> which is fantastic for supporting grid views. But I'm encountering problems regarding the way it dequeues cells.</p> <p>Some background info on my app: I have a class named 'ProductsGVC' which presents a grid view of products belonging to a certain 'Category'. ProductsGVC's data model is an array of products taken from an instance of a 'Category'.</p> <p>My GMGridView creates 250 cells at a time. As I load each cell, I have a thread that downloads an image for each cell. While waiting for it to finish downloading, I put a default image in the cell's image view. Logically, after downloading the cell, I want to reload the cell to update the photo. I'm successful at doing this using this code:</p> <pre><code>//_currentData is my array of products [_gmGridView reloadObjectAtIndex:[_currentData indexOfObject:product] animated:YES]; </code></pre> <p>However, if the a cell that is in the bottom part of my array is updated, the cell is refreshed properly but 1 cell disappears.</p> <p>My inefficient solution is to call <code>[_gmGridView reloadData]</code> anytime a cell finishes downloading its image. The result is, the cells I've loaded before, disappear. I'm guessing their dequeued and reused. Well, they do appear again when I scroll a number of times away from those cells that disappeared. </p> <p>My question is, how do I prevent dequeue-ing a visible cell (i.e. a cell that is currently on-screen)?</p>
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