在配置WebDriverAgent的时候，可能会遇到如下的错误：
2018-01-04 09:53:42.759370-0600 WebDriverAgentRunner-Runner[318:13300] +[CATransaction synchronize] called within transaction
2018-01-04 09:53:43.090645-0600 WebDriverAgentRunner-Runner[318:13300] Running tests...
2018-01-04 09:53:43.354179-0600 WebDriverAgentRunner-Runner[318:13300] The bundle “WebDriverAgentRunner” couldn’t be loaded because it is damaged or missing necessary resources. Try reinstalling the bundle.
2018-01-04 09:53:43.354342-0600 WebDriverAgentRunner-Runner[318:13300] (dlopen_preflight(/var/containers/Bundle/Application/41C8100D-E3BF-4D1B-9A26-BA9C9E3479F8/WebDriverAgentRunner-Runner.app/PlugIns/WebDriverAgentRunner.xctest/WebDriverAgentRunner): Library not loaded: @rpath/RoutingHTTPServer.framework/RoutingHTTPServer
Referenced from: /private/var/containers/Bundle/Application/41C8100D-E3BF-4D1B-9A26-BA9C9E3479F8/WebDriverAgentRunner-Runner.app/PlugIns/WebDriverAgentRunner.xctest/Frameworks/WebDriverAgentLib.framework/WebDriverAgentLib
Reason: no suitable image found. Did find:
/private/var/containers/Bundle/Application/41C8100D-E3BF-4D1B-9A26-BA9C9E3479F8/WebDriverAgentRunner-Runner.app/PlugIns/WebDriverAgentRunner.xctest/Frameworks/WebDriverAgentLib.framework/Frameworks/RoutingHTTPServer.framework/RoutingHTTPServer: required code signature missing for '/private/var/containers/Bundle/Application/41C8100D-E3BF-4D1B-9A26-BA9C9E3479F8/WebDriverAgentRunner-Runner.app/PlugIns/WebDriverAgentRunner.xctest/Frameworks/WebDriverAgentLib.framework/Frameworks/RoutingHTTPServer.framework/RoutingHTTPServer'
)
Solution：
Go to TARGETS -> WebDriverAgentRunner -> Build Phases -> Copy frameworks
Add RoutingHTTPServer.framework
