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我是 iOS 编程的初学者。我想知道是否有办法让应用程序在电池电量达到 20% 时触发本地通知。那就是我启动应用程序并进行适当的更改。从任务管理器终止或杀死应用程序后,当电池电量达到 20% 时,它会触发本地通知。