iOS Swift: Fix 'EXC_BAD_ACCESS' Crash on Background Thread UI Update

The Problem

Your app crashes with EXC_BAD_ACCESS or Main Thread Checker warnings.

The Fix

Always dispatch UI updates to the main thread:

DispatchQueue.main.async {
    self.tableView.reloadData()
}

With async/await (Swift 5.5+)

Use @MainActor to guarantee UI work runs on the main thread:

@MainActor
func loadData() async {
    let posts = await fetchPostsFromAPI()
    self.tableView.reloadData()
}