UITableView 优化

Asked on 06/12/2025

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To optimize UITableView, you can take advantage of several updates and features introduced in recent WWDC sessions. Here are some key points:

  1. Automatic Trait Tracking: In iOS 18, automatic trait tracking helps improve performance by automatically updating views when traits change, eliminating the need for manual updates. This is particularly useful for UITableView as it ensures that layout updates are handled efficiently. You can learn more about this in the session What’s new in UIKit.

  2. List Environment Trait: UITableView now benefits from the list environment trait, which helps in styling cells appropriately based on the list's style. This feature simplifies the code needed to configure cells and ensures consistency across different list styles. More details can be found in the session What’s new in UIKit.

  3. Idle Prefetch: This technique is used to improve scrolling performance by prefetching data during idle times, reducing the likelihood of dropped frames. This is particularly beneficial for UITableView when dealing with large datasets. The concept is discussed in the Platforms State of the Union.

These improvements are part of Apple's ongoing efforts to enhance performance and user experience in UIKit applications.

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