nsuserdefaults value getting replaced [duplicate] - ios

Question

This question already has answers here:
NSUserDefaults not working right
(3 answers)
Closed 9 years ago.
Inside the same viewcontroller class i am using two NSUserDefaults,one for saving UISwitch state and other one for DatePicker value.
Here is my code :
-(IBAction) switchValueChanged
{
NSString *value = #"ON";
NSUserDefaults *userPreferences = [NSUserDefaults standardUserDefaults];
if (switch1.on)
{
value = #"OFF";
[userPreferences setObject:value forKey:#"stateOfSwitch"];
[switch1 setOn:YES animated:YES];
}
else
{
[userPreferences setObject:value forKey:#"stateOfSwitch"];
[switch1 setOn:NO animated:YES];
[[UIApplication sharedApplication] cancelAllLocalNotifications];
}
}
- (IBAction)scheduleTime
{
NSDate *pickerTime=datePicker.date;
[[NSUserDefaults standardUserDefaults] setObject:pickerTime forKey:#"setPickerTime"];
[[NSUserDefaults standardUserDefaults] synchronize];
}
Problem is, only nsuserdefault for date picker is working,other one is not working.I think NSUserDefault value of DatePicker is replacing UISwitch's NsUserDefault value.Can anyone help me to solve this problem..

Answer 1

NSUserDefaults caches the information to avoid having to open the
user’s defaults database each time you need a default value. The
synchronize method, which is automatically invoked at periodic
intervals, keeps the in-memory cache in sync with a user’s defaults
database.
Add a [userPreferences synchronize]; invocation after the if/else block in the first function and try again.

Answer 2

try this code:
if (switch1.on)
{
value = #"OFF";
[[NSUserDefaults standardUserDefaults] setObject:value forKey:#"stateOfSwitch"];
[switch1 setOn:YES animated:YES];
}
else
{
[[NSUserDefaults standardUserDefaults] setObject:value forKey:#"stateOfSwitch"];
[switch1 setOn:NO animated:YES];
[[UIApplication sharedApplication] cancelAllLocalNotifications];
}