深入理解 UIApplication

[ShannonChenCHN]

大纲

• UIApplication 简介
• 应用生命周期
• UIApplicationMain 函数
• RunLoop
• 相关API
• 实践应用

相关 issue

• RunLoop

[ShannonChenCHN]

延伸阅读：

• UIApplication 介绍
• UIApplication API Reference
• UIApplicationDelegate API Reference

[ShannonChenCHN]

App's Life Cycle

When your app’s state changes, UIKit notifies you by calling methods of the appropriate delegate object:

• In iOS 13 and later, use UISceneDelegate objects to respond to life-cycle events in a scene-based app.
• In iOS 12 and earlier, use the UIApplicationDelegate object to respond to life-cycle events.

1. Respond to Scene-Based Life-Cycle Events

2. Respond to App-Based Life-Cycle Events

参考：

• Managing Your App's Life Cycle - Apple Developer