Fix bugs in objective-c.
diff --git a/.gitignore b/.gitignore
index 03d163a..a296142 100644
--- a/.gitignore
+++ b/.gitignore
@@ -87,9 +87,12 @@
# Directories created by opening the Objective C Xcode projects.
objectivec/ProtocolBuffers_OSX.xcodeproj/project.xcworkspace/xcuserdata/
+objectivec/ProtocolBuffers_OSX.xcodeproj/project.xcworkspace/xcshareddata/ProtocolBuffers_OSX.xccheckout
objectivec/ProtocolBuffers_OSX.xcodeproj/xcuserdata/
objectivec/ProtocolBuffers_iOS.xcodeproj/project.xcworkspace/xcuserdata/
+objectivec/ProtocolBuffers_iOS.xcodeproj/project.xcworkspace/xcshareddata/ProtocolBuffers_iOS.xccheckout
objectivec/ProtocolBuffers_iOS.xcodeproj/xcuserdata/
+objectivec/**/.DS_Store
# Comformance test output
conformance/.libs/