From the course: iOS Development: Threading and Grand Central Dispatch
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Challenge: Download images in a collection view
From the course: iOS Development: Threading and Grand Central Dispatch
Challenge: Download images in a collection view
(upbeat music) - [Instructor] The following app features images from the Flickr API and loads them into a collection view before saving them to core data so that they're accessible without internet. If you scroll down and back up again, you notice that the first two image flicker after a moment and also in some cases, the cells repeat the same image, as you can see here. We therefore need to ensure that the image updated is the right image for the cell and that you're also caching the images so that you can save our users' data.
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