How can i reduce memory usage in my ios app?

Question

I am building a Pinterest like app, which has a uicollectionview with endless cells, each having an image.

Now continually scrolling through the collectionview, more images are loaded and cached.

I am observing that the memory usage is reaching 200MB and increasing.

My question is what are the best practices used in this case ?

Answer 1

One important thing is to reuse your cell. You can reference to the following method.

func dequeueReusableCell(withReuseIdentifier identifier: String, 
                     for indexPath: IndexPath) -> UICollectionViewCell

https://developer.apple.com/documentation/uikit/uicollectionview/1618063-dequeuereusablecell

Call this method from your data source object when asked to provide a new cell for the collection view. This method dequeues an existing cell if one is available or creates a new one based on the class or nib file you previously registered.