start and stop timer of one view from another view - iphone

Question

in my app there are two views. view1 has a function testing
-(void) testing
{
NSLog(#"Testing : %d", (++x));
}
and a timer
timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:#selector(testing) userInfo:nil repeats:YES];
what i want, is to stop and run this timer from view2. How to do that ?

Answer 1

Define Timer in AppDelegate,
#interface TimerDemoAppDelegate : NSObject <UIApplicationDelegate>
{
NSTimer *timer;
}
#property (nonatomic, retain) NSTimer *timer;
#end
And use timer in your both view by creating TimerDemoAppDelegate object
in your view .h file
#interface View1 : UIViewController
{
TimerDemoAppDelegate *appDelegate;
}
in your view .m file
appDelegate=(TimerDemoAppDelegate *)[[UIApplication sharedApplication] delegate];
now use timer as appDelegate.timer.

Answer 2

Add timer2 to your View2 class
#interface View2 : UIView{
NSTimer *timer2;
}
#property (nonatomic,retain) NSTimer *timer2;
#end
#implementation View2
#synthesize timer2;
#end
and do like this
timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:#selector(testing) userInfo:nil repeats:YES];
view2.timer2 = timer;

Answer 3

Using NSNotificationCenter you can call methods from another view without creating any objects.
In your viewDidLoad
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(button:)
name:#"Next"
object:nil];
-(void)button:(NSNotification *) notification
{
// write a code of timer here.....
}
//call this following from another view
[[NSNotificationCenter defaultCenter]
postNotificationName:#"Next"
object:self];
Enjoy with this code....