如何在卸载iPhone应用程序时触发事件？

Question

卸载iphone应用后，我想从数据库服务中删除所有数据

Answer 1

this can be possible but I dont think there is a very simple way like implementing a method when user removes your app. you can take a look in APNS Feedback Service , this might help you.

If a provider attempts to deliver a push notification to an application, but the application no longer exists on the device, the device reports that fact to Apple Push Notification Service. This situation often happens when the user has uninstalled the application. If a device reports failed-delivery attempts for an application, APNs needs some way to inform the provider so that it can refrain from sending notifications to that device. Doing this reduces unnecessary message overhead and improves overall system performance.

Answer 2

For an iOS app, remove option which comes after long pressing on icon is the only 'uninstalling' option which will always remove any stored date of the app from device. There will not be any particular event triggered when user does that.