[iOS] fix ci build script
diff --git a/.travis.yml b/.travis.yml
index 9490dae..ebeb24e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -121,7 +121,7 @@
         nvm install 12.6.0  
 
         git submodule update --init --remote
-        cd weex-playground/ios
+        cd weex-playground/ios && bash update_podfile_for_travisci.sh
         cd ../../ && npm install
         cd weex-playground/ios && bundle install && pod install --repo-update
         cd ../../
@@ -168,10 +168,10 @@
       "ios" )
         if npm run danger -- ci --dangerfile ./dangerfile-ios.js | grep -q "hasIosFile" ; then
           # build WeexSDK and run WeexSDKTests
-          #xcodebuild -quiet -project ios/sdk/WeexSDK.xcodeproj test -scheme WeexSDKTests CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO -destination "platform=iOS Simulator,name=iPhone 6" || exit 1
+          xcodebuild -quiet -project ios/sdk/WeexSDK.xcodeproj test -scheme WeexSDKTests CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO -destination "platform=iOS Simulator,name=iPhone 6" || exit 1
           # build WeexDemo and run WeexDemo test
           cd weex-playground/ios && mkdir tmp && mv * tmp;cd tmp
-          #xcodebuild -quiet -workspace WeexDemo.xcworkspace test -scheme WeexDemo CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO -destination "platform=iOS Simulator,name=iPhone 6" || exit 1
+          xcodebuild -quiet -workspace WeexDemo.xcworkspace test -scheme WeexDemo CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO -destination "platform=iOS Simulator,name=iPhone 6" || exit 1
         fi
         ;;
     esac