How to connect viewcontroller to NSObject class file? - ios

Question

I want to connect and pass the action from ViewController to NSObject class file. In my viewcontroller, there is UISwitch Button and if I switch I want to work it in NSObject class file.
When switch is ON from viewcontroller (UIView) then the action have to work in NSObject class file.
I'm coding with Objective-C.
Here is my ViewController.m and I did this in only ViewController file. Not connected to NSOBject class file.
- (void)viewDidLoad{
[super viewDidLoad];
//UISwitch work at viewDidload
[self.mySwitch addTarget:self
action:#selector(stateChanged:) forControlEvents:UIControlEventValueChanged]; }
- (void)stateChanged:(UISwitch *)switchState{
NSLog(#"current calendar: %#", [[NSCalendar currentCalendar] calendarIdentifier]);
//get the date today
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateStyle:NSDateFormatterMediumStyle];
[formatter setCalendar:[NSCalendar currentCalendar]];
NSString *dateToday = [formatter stringFromDate:[NSDate date]];
NSLog(#"Today Date is: %#", [NSDate date]);
self.myLabel.text=dateToday;
if ([switchState isOn]) {
//[formatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:#"en_US#calendar=japanese"]];
[formatter setCalendar:[[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierJapanese]];
[formatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
[formatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
NSString *dateToday = [formatter stringFromDate:[NSDate date]];
UILabel *dtDate = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 320.0f, 20.0f)];
[dtDate setText:dateToday];
self.myLabel.text =dateToday;
NSString *locale = [[NSLocale currentLocale] localeIdentifier];
NSLog(#"current date is: %#", dateToday);
NSLog(#"current locale: %#", locale);
} else {
//[formatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:#"en_US"]];
[formatter setCalendar:[NSCalendar autoupdatingCurrentCalendar]];
[formatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
[formatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
NSString *dateToday = [formatter stringFromDate:[NSDate date]];
UILabel *myLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 320.0f, 20.0f)];
[myLabel setText:dateToday];
self.myLabel.text =dateToday;
// NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
// [formatter setDateStyle:NSDateFormatterMediumStyle];
NSString *locale = [[NSLocale currentLocale] localeIdentifier];
NSLog(#"current locale: %#", locale);
NSLog(#"%#", [formatter stringFromDate: [NSDate date]]);
}
}

Answer 1

If you need just an action then use class methods else create a global variable or a notification observer in NSObject extended class when you get call back from the switch.
- (void)callback:(id)sender
{
[MyObject switchState:sender.state];
}