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iosobjective-cnsuserdefaultsuiswitch

Save switch position after closing app

I wanted to know how to save the position of a switch to close and open the application ?

-(IBAction)switch_poids_passagers:(UISwitch *)sender {

 NSString *poids_passagers_total;
 if(sender.on) {
      poids_passagers_total = @"1";

 } else {
      poids_passagers_total = @"2";

 }

 [[NSUserDefaults standardUserDefaults] setObject:poids_passagers_total forKey:@"poids_passagers_total"];
 [[NSUserDefaults standardUserDefaults] synchronize];

}

Solution

  • NSUserDefaults can save and retrieve BOOLS with a pair methods it provides:

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setBool:self.myUISwitch.on forKey:@"switchValue"];
// ...

    Later on, maybe in viewWillAppear...

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
BOOL switchValue = [defaults boolForKey:@"switchValue"];
self.myUISwitch.on = switchValue;