Question

I have this code:

-(IBAction) doSomething{ 
FirstViewController *firstViewController = [[[FirstViewController alloc]init]autorelease];
[firstViewController.label1 setAlpha:1.00];
[firstViewController.label2 setAlpha:1.00];
}

-(void) do{
//use firtsViewController in this method
}

As you can see in the example I use an object “firstViewController” of FirstViewController class, but if I want to use the same object in method “do”? How can I do

Answer 1

In the header have…

FirstViewController *firstViewController;

Then replace your method with…

-(IBAction) doSomething{ 
if(firstViewController == nil) {
  firstViewController = [[FirstViewController alloc]init];
}

[firstViewController.label1 setAlpha:1.00];
[firstViewController.label2 setAlpha:1.00];
}

and add..

- (void)dealloc {
  [firstViewController release];
  [super dealloc];
}