save data with multiple UISwitch

[k2c]

I have some UISwitch on my app's setting page. I'd like to save state of these UISwitch and want them to remain same state as before after relaunch app. How do you do it? Should I save it into .plist file by using stringByAppendingPathComponent method? or Should I use NSUserDefaults method?
Please help!

[k2c]

anybody?

[_sjc_]

I'd suggest saving them into the user defaults, since it's the more logical location (and also less work for you).

Come up with a unique setting name for each switch, and then save them in -applicationWillTerminate and restore them in -applicationDidFinishLaunching, eg.

-(void)applicationDidFinishLaunching:(UIApplication *)app {

    NSUserDefaults *defs = [NSUserDefaults standardUserDefaults];

    mySwitchOne.on = [defs boolForKey: @"mySwitchOneSetting"];
    mySwitchTwo.on = [defs boolForKey: @"mySwitchTwoSetting"];
}

-(void)applicationWillTerminate:(UIApplication *)app {

    NSUserDefaults *defs = [NSUserDefaults standardUserDefaults];

    [defs setBool: mySwitchOne.on forKey: @"mySwitchOneSetting"];
    [defs setBool: mySwitchTwo.on forKey: @"mySwitchTwoSetting"];
}

You may also want to look at the -registerDefaults: method of NSUserDefaults for how to set up the default values of the switches for the first time the application runs.

[k2c]

Thank you very much for spending time to answer my question, _sjc_!
I just tried the code you suggested, but it didn't save previous status of switches. Did I miss something?

.m file

-(void)applicationDidFinishLaunching:(UIApplication *)app {
	
    NSUserDefaults *defs = [NSUserDefaults standardUserDefaults];
	
    SwitchOne.on = [defs boolForKey: @"MYSwitchOne"];
    SwitchTwo.on = [defs boolForKey: @"MYSwitchTwo"];
}

-(void)applicationWillTerminate:(UIApplication *)app {
	
    NSUserDefaults *defs = [NSUserDefaults standardUserDefaults];
	
    [defs setBool: SwitchOne.on forKey: @"MYSwitchOne"];
    [defs setBool: SwitchTwo.on forKey: @"MYSwitchTwo"];
}

.h file

-(void)applicationDidFinishLaunching:(UIApplication *)app;
-(void)applicationWillTerminate:(UIApplication *)app;

[gerakis]

I doubt you still care about this, but I think I know whats wrong. You have to add in a few lines to deal with the applicationWillTerminate part.

-(void)applicationDidFinishLaunching:(UIApplication *)app {
	
    NSUserDefaults *defs = [NSUserDefaults standardUserDefaults];
	
    SwitchOne.on = [defs boolForKey: @"MYSwitchOne"];
    SwitchTwo.on = [defs boolForKey: @"MYSwitchTwo"];

//for activating the state saver later
	UIApplication *app = [UIApplication sharedApplication];
	[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(applicationWillTerminate:) name:UIApplicationWillTerminateNotification object:app];
}

-(void)applicationWillTerminate:(UIApplication *)app {
	
    NSUserDefaults *defs = [NSUserDefaults standardUserDefaults];
	
    [defs setBool: SwitchOne.on forKey: @"MYSwitchOne"];
    [defs setBool: SwitchTwo.on forKey: @"MYSwitchTwo"];

    [[NSUserDefaults standardUserDefaults] synchronize];


}