Why won't my project run in the iPhone Simulator?

Question

For some reason, my application will install and run fine on my device, but when I try to install my application on the iPhone Simulator, I get these warnings:

ld: warning: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.0.sdk/System/Library/Frameworks/UIKit.framework/UIKit, missing required architecture i386 in file


ld: warning: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.0.sdk/System/Library/Frameworks/Foundation.framework/Foundation, missing required architecture i386 in file


ld: warning: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.0.sdk/System/Library/Frameworks/CoreGraphics.framework/CoreGraphics, missing required architecture i386 in file


ld: warning: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.0.sdk/System/Library/Frameworks/CFNetwork.framework/CFNetwork, missing required architecture i386 in file


ld: warning: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.0.sdk/System/Library/Frameworks/AudioToolbox.framework/AudioToolbox, missing required architecture i386 in file


ld: warning: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.0.sdk/System/Library/Frameworks/MobileCoreServices.framework/MobileCoreServices, missing required architecture i386 in file


ld: warning: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.0.sdk/System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguration, missing required architecture i386 in file


ld: warning: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.0.sdk/System/Library/Frameworks/QuartzCore.framework/QuartzCore, missing required architecture i386 in file

And that causes a bunch of errors that just occur when those frameworks are just not present. Errors like:

  "_OBJC_CLASS_$_NSMutableCharacterSet", referenced from:      objc-class-ref-to-NSMutableCharacterSet in SBJsonWriter.o

Answer 1

I had the same problem. It was due to dragging frameworks from one project to another with the Copy option enabled. Even though I had later de-referenced these frameworks, and added them correctly, it still gave me these errors until I had deleted the framework directories from the project.

Answer 2

The Answer is:

1) The Base SDK should be Device

2) iPhone SDK Frameworks were copied into your project directory (on disk). Open your project directory and remove any standard iPhone SDK Frameworks.

3) Clean Caches and Rebuild

Answer 3

You need to go to build on the top menu bar and press the option clean all targets

Answer 4

I figured out a fix. I set the base SDK to iPhone Simulator 4.0, and because it still tried to get SDKs from the iPhoneOS, I renamed iPhoneOS.platoform to iPhoneOS_2.platform so Xcode cannot access the SDKs from that platform.

Answer 5

I think that you set iPhone Device x.x instead of iPhone Simulator x.x as the base SDK. A similar thing hapend to me, when I did that.

Answer 6

If I'm not mistaken, if you use base SDK > 3.2, you should set the architecture to optimized. Which is armv7. I'm not sure though.
~ Natanavra.

Answer 7

It is attempting to build against the device libraries for use on the simulator. The paths should look like:

/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.0.sdk/System/Library/Frameworks/UIKit.framework/UIKit

... with iPhoneSimulator.platform instead of iPhoneOS.platform. Check your build settings, clean the project and empty the Xcode cache(Xcode>Empty Cache...).