# Build a Smooth, Scrolling Social Media Feed in SwiftUI

> By Lawrence Arya, Founder & CEO of VP0. Published 2026-06-08. 6 min read.
> Source: https://vp0.com/blogs/social-media-feed-ui-swiftui

**TL;DR.** A social media feed in SwiftUI is a vertical scroll of post cards: avatar, content, and like, comment, and share actions. The screen is easy to lay out and easy to make janky, so the real work is lazy rendering with LazyVStack or List, downsampled images via AsyncImage, and smooth pull-to-refresh and infinite scroll. Start from a free feed template so the card, the actions, and the loading states are already shaped.

## What a social feed screen is made of

A social media feed is a vertical scroll of post cards. Each card carries a header with an avatar, a name, and a timestamp, then the content, text or an image or both, then a row of actions: like, comment, share. Stack those cards in a scrolling container and you have the screen. In SwiftUI the container is usually a [List](https://developer.apple.com/documentation/swiftui/list) or a [LazyVStack](https://developer.apple.com/documentation/swiftui/lazyvstack) inside a [ScrollView](https://developer.apple.com/documentation/swiftui/scrollview), and the card is a view you build once and reuse for every post.

The layout is the easy part. A feed is also one of the easiest screens to make janky, because it scrolls fast, mixes text and media, and can run for thousands of posts. So the work that matters is not the card design, it is keeping the scroll smooth as the feed grows.

## Lazy rendering keeps a long feed smooth

The first rule is to render only what is on screen. A plain `VStack` builds every card up front, which is fine for ten posts and fatal for a thousand. `LazyVStack` and `List` both create cards as they scroll into view and release them as they leave, so memory and work stay flat no matter how long the feed is. Pair that with stable identifiers for each post so SwiftUI can tell which cards changed, and the list stops rebuilding views that did not move.

This is the same discipline behind any long scroll, and it is where hand-built feeds usually go wrong: an eager stack that feels fine in a demo and stutters the moment real data arrives.

## Images are where feeds get slow

Most feed jank is image jank. A post photo arrives at full resolution, and decoding a 4,000 by 3,000 pixel image into a 350-point-wide card burns memory and drops frames for nothing. [AsyncImage](https://developer.apple.com/documentation/swiftui/asyncimage) loads remote images without blocking the scroll, but it does not downsample for you, so a serious feed adds a cache and resizes images to roughly the size they display. Load at display size, cache decoded results, and show a placeholder while the image arrives, and the feed scrolls cleanly even on a media-heavy timeline.

Get this wrong and no amount of lazy rendering saves you, because the cost is in the pixels, not the views.

## The interactions: likes, refresh, and infinite scroll

A feed feels alive through three interactions. The like needs an instant, optimistic response, the heart fills and the count ticks the moment it is tapped, before the server confirms, with a small spring and a double-tap shortcut on the image. Pull-to-refresh loads newer posts from the top, which SwiftUI gives you with a refresh modifier on the list. And infinite scroll loads older posts as the user nears the bottom, fetching the next page before they hit the end so the feed never visibly stalls. Each of these needs honest states: a failed like rolls back, a refresh shows it is working, and the end of the feed says so rather than spinning forever.

## Building it from a template

The card, the action row, and these states are the same in every feed, which makes them worth starting from rather than rebuilding. A free [VP0](https://vp0.com) design ships the post card, the like and comment actions, the image handling, and the loading and empty states as a SwiftUI file with a machine-readable source page, so pasting the link into Claude Code or Cursor gives the agent a working feed to fill with your data. The same card-and-scroll pattern sits behind a [Discord-style server sidebar](/blogs/discord-server-sidebar-ui-react-native/) and an [Instagram story share export](/blogs/instagram-story-share-export-template-react-native/), and the chat-style variant powers a [Kakao-style chat clone in SwiftUI](/blogs/kakao-talk-chat-ui-clone-swiftui/).

## Common mistakes building a feed

The usual ones come from eager work and full-size media. A plain `VStack` instead of `LazyVStack` builds the whole feed up front and stutters on long lists. Full-resolution images in small cards drop frames no matter how lazy the list is. A like that waits for the server before updating feels broken, so optimistic updates matter. Unstable post identifiers make cards flicker and re-render as new posts load. And infinite scroll that fetches only when the user hits the very bottom produces a visible stall instead of a seamless feed.

## Key takeaways: a SwiftUI social feed

- **A feed is reused post cards in a lazy scroll.** Build the card once, render it for every post.
- **Lazy rendering is non-negotiable.** `LazyVStack` or `List` so only visible cards exist.
- **Images cause most jank.** Downsample to display size and cache, do not decode full-resolution photos into small cells.
- **Interactions need optimistic, honest states.** Instant likes, working refresh, and a feed end that says so.
- **Start from a feed template.** A free VP0 SwiftUI design gives an agent the card, the actions, and the states to fill with data.

## Frequently asked questions

**How do I build a social media feed UI in SwiftUI?** Build one post card view, an avatar header, the content, and a like, comment, and share row, then render it in a `List` or a `LazyVStack` inside a `ScrollView` so only visible cards exist. Load images with AsyncImage but downsample them to display size and cache them, give each post a stable identifier, and add optimistic likes, pull-to-refresh, and infinite scroll. Starting from a free feed template means the card, the actions, and the loading states are already built.

**What is the safest way to build a feed with Claude Code or Cursor?** Give the agent a real feed template with the card, the interactions, and the states, not just a static list. A free VP0 SwiftUI design has a machine-readable source page with the post card, the like and comment actions, the image handling, and the empty and loading states, so Claude Code or Cursor wires your data into a working, smooth feed. That avoids the common result where an AI tool builds an eager `VStack` with full-size images that stutters on real data.

**Can VP0 provide a free SwiftUI template for a social feed?** Yes. VP0 has free social feed designs in SwiftUI with the post card, the action row, the image handling, and the loading and empty states already built, each exposing an AI-readable source page. Because the screen exists, your agent connects it to a real posts API instead of inventing the card layout and the scroll performance handling that usually trip up hand-built feeds.

**How do I keep a SwiftUI feed from stuttering?** Render lazily with `LazyVStack` or `List` so only visible cards are built, and fix images, which cause most jank, by downsampling to display size and caching decoded results rather than loading full-resolution photos into small cells. Give posts stable identifiers so cards do not re-render needlessly, and prefetch the next page before the user reaches the bottom. Those four habits keep the scroll smooth even on a long, media-heavy timeline.

**What common errors happen when vibe coding a feed?** Using a plain `VStack` that builds every card up front, loading full-resolution images into small cells, and making likes wait for the server before updating are the frequent ones. Unstable post identifiers cause cards to flicker as new data loads, and infinite scroll that fires only at the very bottom produces a visible stall. Render lazily, downsample images, update optimistically, and prefetch the next page.

## Frequently asked questions

### How do I build a social media feed UI in SwiftUI?

Build one post card view, an avatar header, the content, and a like, comment, and share row, then render it in a List or a LazyVStack inside a ScrollView so only visible cards exist. Load images with AsyncImage but downsample them to display size and cache them, give each post a stable identifier, and add optimistic likes, pull-to-refresh, and infinite scroll. Starting from a free feed template means the card, the actions, and the loading states are already built.

### What is the safest way to build a feed with Claude Code or Cursor?

Give the agent a real feed template with the card, the interactions, and the states, not just a static list. A free VP0 SwiftUI design has a machine-readable source page with the post card, the like and comment actions, the image handling, and the empty and loading states, so Claude Code or Cursor wires your data into a working, smooth feed. That avoids the common result where an AI tool builds an eager VStack with full-size images that stutters on real data.

### Can VP0 provide a free SwiftUI template for a social feed?

Yes. VP0 has free social feed designs in SwiftUI with the post card, the action row, the image handling, and the loading and empty states already built, each exposing an AI-readable source page. Because the screen exists, your agent connects it to a real posts API instead of inventing the card layout and the scroll performance handling that usually trip up hand-built feeds.

### How do I keep a SwiftUI feed from stuttering?

Render lazily with LazyVStack or List so only visible cards are built, and fix images, which cause most jank, by downsampling to display size and caching decoded results rather than loading full-resolution photos into small cells. Give posts stable identifiers so cards do not re-render needlessly, and prefetch the next page before the user reaches the bottom. Those four habits keep the scroll smooth even on a long, media-heavy timeline.

### What common errors happen when vibe coding a feed?

Using a plain VStack that builds every card up front, loading full-resolution images into small cells, and making likes wait for the server before updating are the frequent ones. Unstable post identifiers cause cards to flicker as new data loads, and infinite scroll that fires only at the very bottom produces a visible stall. Render lazily, downsample images, update optimistically, and prefetch the next page.

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*Published on the [VP0 Journal](https://vp0.com/blogs). Free to read, index and cite with attribution.*