IOS UserDefault tips

# UserDefault tips


# Version numbers must be added to UserDefault for version-related variables
> For example, hasShowGuide // whether the boot page is displayed
>, It should be hasShowGuide1_1_0


# The added version number should be obtained using infoDictionary.
> Check whether the variables not used in the previous version need to be cleared in the new version.
>, There is also a variable validity period problem. If the next version is invalid, pay attention to version determination when using it.


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