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Manual Automatic Post Refresh
Instagram Firebase
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In today's lesson, we're going to cover the topic of implementing an easy way to refresh our feed using a <b>UIRefreshControl</b>. This component allows us to present a <b>UIActivityIndicatorView</b> when we drag our <b>UICollectionView</b> down to refresh. Next, we'll look at how to automatically refresh our home feed every time we upload a new post to <b>Firebase Database</b>. For this to work, we'll look at implementing <b>NotificationCenter</b> observers.

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