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objective-cnsuserdefaultsuiswitchreactive-cocoa

Bind UISwitch's state to NSUserDefaults with ReactiveCocoa

How can I bind UISwitch.on with the value for a key in NSUserDefaults?

Solution

  • You can bind them (two-way binding) by following:

    RACChannelTerminal *switchTerminal = self.someSwitch.rac_newOnChannel;
RACChannelTerminal *defaultsTerminal = [[NSUserDefaults standardUserDefaults] rac_channelTerminalForKey:@"someBoolKey"];

[switchTerminal subscribe:defaultsTerminal];
[defaultsTerminal subscribe:switchTerminal];

    The switch's on state starts with the value from the user defaults or NO.