XCTest.framework build error

XCTest.framework build error

I am using the DropBox Core API in my app and therefore, I must include
the XCTest framework, because, when I haven't added the XCTest framework,
my app can't connect to dropbox, however when I do add the framework, I
get an error while building for the simulator. There is nothing wrong with
my code! Here is the error:
Ld
/Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop!-fchnxyvnqyeefscfhmohrzxtiqeb/Build/Products/Debug-iphonesimulator/SnapDrop!.app/SnapDrop!
normal i386
cd "/Users/Zach/Desktop/SnapDrop!"
setenv IPHONEOS_DEPLOYMENT_TARGET 6.1
setenv PATH
"/Applications/Xcode5-DP6.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode5-DP6.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Applications/Xcode5-DP6.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
-arch i386 -isysroot
/Applications/Xcode5-DP6.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk
-L/Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop!-fchnxyvnqyeefscfhmohrzxtiqeb/Build/Products/Debug-iphonesimulator
-F/Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop!-fchnxyvnqyeefscfhmohrzxtiqeb/Build/Products/Debug-iphonesimulator
-F/Users/Zach/Downloads/dropbox-ios-sdk-1.3.5
-F/Users/Zach/Downloads/dropbox-ios-sync-sdk-1-1.1.0
-F/Applications/Xcode5-DP6.app/Contents/Developer/Library/Frameworks
-F/Users/Zach/Desktop -filelist
/Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop!-fchnxyvnqyeefscfhmohrzxtiqeb/Build/Intermediates/SnapDrop!.build/Debug-iphonesimulator/SnapDrop!.build/Objects-normal/i386/SnapDrop!.LinkFileList
-Xlinker -objc_abi_version -Xlinker 2 -fobjc-arc -fobjc-link-runtime
-Xlinker -no_implicit_dylibs -mios-simulator-version-min=6.1
-framework iAd -framework AssetsLibrary -framework QuartzCore
-framework SystemConfiguration -framework Security -framework
CFNetwork -framework XCTest -framework Dropbox -framework DropboxSDK
-framework CoreGraphics -framework UIKit -framework Foundation
-Xlinker -dependency_info -Xlinker
/Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop!-fchnxyvnqyeefscfhmohrzxtiqeb/Build/Intermediates/SnapDrop!.build/Debug-iphonesimulator/SnapDrop!.build/Objects-normal/i386/SnapDrop!_dependency_info.dat
-o
/Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop!-fchnxyvnqyeefscfhmohrzxtiqeb/Build/Products/Debug-iphonesimulator/SnapDrop!.app/SnapDrop!
ld: building for iOS Simulator, but linking against dylib built for MacOSX
file
'/Applications/Xcode5-DP6.app/Contents/Developer/Library/Frameworks/XCTest.framework/XCTest'
for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see
invocation)
What should I do? If my framework is corrupt, can you tell me how to
reinstall it? I have tried deleting and reinstalling Xcode with no luck.