Pause and resume Timer in ViewController - objective-c

Question

I want to pause and resume timer in viewcontroller which is displayed as subview in mainviewcontroller. Play/Pause button in mainviewcontroller when pressed it displays view controller as subview as well as plays audio.
Have this NSTimer in view controller
[NSTimer scheduledTimerWithTimeInterval:2.6
target:self
selector:#selector(updateView:)
userInfo:nil
repeats:YES];
- (void)updateView:(NSTimer *)theTimer
{
if (index < [textArray count])
{
self.textView.text = [self.textArray objectAtIndex:index];
self.imageView.image = [self.imagesArray objectAtIndex:index];
index++;
} else {
index = 0;
}
I want to pause and resume timer when play/pause button is pressed in mainviewcontroller. How can i do that.

Answer 1

NSTimer* myTimer = [NSTimer scheduledTimerWithTimeInterval:2.6
target:self
selector:#selector(updateView:)
userInfo:nil
repeats:YES];
[myTimer invalidate];
/*
Stops the receiver from ever firing again and requests its removal from its run loop.
*/
[myTimer fire];
/*
You can use this method to fire a repeating timer without interrupting its regular firing schedule. If the timer is non-repeating, it is automatically invalidated after firing, even if its scheduled fire date has not arrived.
*/

Answer 2

First you have to keep a reference of your timer in your interface-file:
NSTimer *myTimer;
In the implementation file you can simply connect and then refer to it:
myTimer = [NSTimer scheduledTimerWithTimeInterval:2.6
target:self
selector:#selector(updateView:)
userInfo:nil
repeats:YES];
To stop the timer call:
[myTimer invalidate];
To start it again:
[myTimer fire];
See NSTimer Class Reference for more info about the NSTimer Class.