Problem with linking QuarzCore

Question

Hello,

I am new with Objective C and iPhone development but that is what I am trying to do... Problem is with QuarzCore and basic animation stuff. These lines are from my applicationDelegate:

#import "QuartzCore/QuartzCore.h"
...
-(void)performTransition {

     if(!transitioning) {

      CATransition *transition = [CATransition animation];
      transition.duration = 0.9;
      transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
      transition.type = kCATransitionMoveIn;
      transition.subtype = (isInMainDialog) ? kCATransitionFromRight : kCATransitionFromLeft;

      transitioning = YES;
      transition.delegate = self;
     [window.layer addAnimation:transition forKey:nil];

      if (isInMainDialog) {
       mainController.view.hidden = YES;
       levelController.view.hidden = NO;
       isInMainDialog = false;

       // start game
       [levelController playLevel:1 balls:3 scores:0];
      }
      else {
       mainController.view.hidden = NO;
       levelController.view.hidden = YES;
       isInMainDialog = true;
      }
     }
    }

okay.. This applicationDelegate compiles ok, but when building following errors happen:

  "_kCATransitionFromRight", referenced from:
      _kCATransitionFromRight$non_lazy_ptr in eBreakAppDelegate.o

  "_kCAMediaTimingFunctionEaseInEaseOut", referenced from:
      _kCAMediaTimingFunctionEaseInEaseOut$non_lazy_ptr in eBreakAppDelegate.o

  "_kCATransitionMoveIn", referenced from:
      _kCATransitionMoveIn$non_lazy_ptr in eBreakAppDelegate.o

  ".objc_class_name_CAMediaTimingFunction", referenced from:
      literal-pointer@__OBJC@__cls_refs@CAMediaTimingFunction in eBreakAppDelegate.o

  "_kCATransitionFromLeft", referenced from:
      _kCATransitionFromLeft$non_lazy_ptr in eBreakAppDelegate.o

  ".objc_class_name_CATransition", referenced from:
      literal-pointer@__OBJC@__cls_refs@CATransition in eBreakAppDelegate.o

ld: symbol(s) not found
collect2: ld returned 1 exit status

So, I guess there is a problem in linking, because there is no problems at compile time. Should I, some how, link the quartz to my project or how could this be fixed?

Answer 1

You need to make sure that QuartzCore is added to your project then change this line:

#import "QuartzCore/QuartzCore.h"

to:

#import <QuartzCore/QuartzCore.h>

The quotations tell the linker to look in the project source files. The '< >' tell it to look for frameworks.

Answer 2

you have to add QuartzCore.framework to your target:

• right click on application target;
• click on [Get Info] in contextual menu;
• in [General] tab there's gonna be two lists, one for dependencies, other for Linked libraries;
• add QuartzCore framework to the botom one.