ios更新应用后plist文件中的key还存在？

Question

使用nsuserdefaults方式存储了一个‘data’：‘str’当更新应用后这个‘data’key依旧存在，该怎么弄呢，我是根据是否能取到值来进行相关操作的

Answer 1

Use version comparison to control

Answer 2

Yes, you can save the corresponding version every time. This is also controlled by version. It depends on your implementation idea