关于CGRectIntersectsRect的简单问题

Question

I just have one simple question. Everytime I use

CGRectIntersectsRect(view1.frame, view2.frame)

I get a linker error stating the linker cannot find the files necessary to compile this method. I do have QuartzCore imported, I'm assuming theres another header I need. Sadly scouring the internet has left me nowhere, and I known this is definetely a simple issue that I keep overlooking. Any answers are appreciated!

Notice: I am using XCode 4 and iOS 5 beta

Answer 1

You want CGRectIntersectsRect , not GCRectIntersectsRect . Make sure you also import the frameworks into your project.

EDIT: Did you add the QuartzCore framework to your project? If not, click on the blue project icon in the top left of Xcode under Run , click on the target , and under the Build Phases tab, select the Link Binary with Libraries option, click on the + , and then add the QuartzCore framework.

Hope that helps!

Answer 2

Import the CoreGraphics framework also. (Not 100% how to think about the distinction between this and QuartzCore, but they are different.)