NSUserDefaults登记册
原文：NSUserDefaults registerDefaults with NSInteger

I am using NSUserDefaults to store some integer settings for my app, but I want to register default values for these settings, using code like this: NSDictionary *appDefaults = [[NSDictionary alloc] ...

如何在用户违约的情况下拯救开关状态?
原文：how to save switch state with user defaults?

是否有办法将UISwitch与NSUserDefaults储存起来?