Question

I have switches in my app that stores position by standardUserDefaults, but when app starts for first time all my switches are in OFF position. How can I set them to ON by default?

Save

NSUserDefaults *defs1 = [NSUserDefaults standardUserDefaults];
    [defs1 setBool: blackSwitch.on forKey: @"blackKey"];
    [[NSUserDefaults standardUserDefaults] synchronize];

Load

NSUserDefaults *defs1 = [NSUserDefaults standardUserDefaults];
    blackSwitch.on = [defs1 boolForKey: @"blackKey"];

Answer 1

First of all

Do the following

NSUserDefaults *defs1 = [NSUserDefaults standardUserDefaults];
BOOL isOn = [defs1 boolForKey: @"blackKey"];
if(isOn) NSLog(@"isOn");

Second asure that blackSwitch is not nil

if(blackSwitch) NSLog(@"blackSwitch is not nil");

If blackswitch is nil, that means that you are still in early stage of view controller initialization, you should move the code that sets it on to viewDidLoad or viewWillAppear

For setting default values please use this code

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; 
NSNumber *testValue = [NSNumber numberWithBool:YES];
NSDictionary *appDefaults = [[NSDictionary alloc] initWithObjectsAndKeys:
testValue, @"blackKey", nil];

[defaults registerDefaults:appDefaults]; 
[appDefaults release];