iOS：重置iOS应用数据有哪些可能的选项而无需重新安装？

This is a iOS 101 question and I feel like an ass for not knowing the answer :-) The question is - how do I reset an iOS app to the state it was when first installed? The app stores content in NSUserDefaults and plists. It appears excessive to have to ask the user to delete and reinstall the app. This is a iOS 101 question and I feel like an a