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ld: building for iOS Simulator, but linking against dylib built for MacOSX file
'/Applications/Xcode5-DP5.app/Contents/Developer/Library/Frameworks/XCTest.framework/XCTest'
for architecture i386
可以试试这样：在Framework search Paths 里添加“$(inherited)和$(SDKROOT)/Developer/Library/Frameworks”， 还有“$(DEVELOPER_LIBRARY_DIR)/Frameworks” ，我参考楼上的回答和http://stackoverflow.com/questions/18266649/xctest-build-errors-for-test-target-xcode-5 这个链接里的回答，发现按照他们的解决方案添加第三条路径后仍有报错，于是在左侧列表中右键Frameworks里面的SenTestingKit.framework，选择“Show in Finder ”，查看该框架的路径，最终，我把第三条路径改成"$(SYSTEM_APPS_DIR)/Xcode.app/Contents/Developer/Library/Frameworks"，就成功了。:D