Configuring an Aggregate Target

The framework target must be a dependency of the aggregate target. The aggregate target must be a dependency of the iMessage Extension target. Configured targets are shown in Figure 1 and Figure 2.

Copying the Framework Into the App

The correct location for the framework is different for archive builds and development builds:

• Archive build: ${DSTROOT}/Applications/MyMessageApp.app/Frameworks

• Development build: ${BUILT_PRODUCTS_DIR}/MyMessageApp.app/Frameworks

The DEPLOYMENT_LOCATION build setting determines which location to use. When DEPLOYMENT_LOCATION is YES, the build is for an archive, and when set to NO, the build is for development.

Configure the aggregate target with a Run Script build phase that copies the framework to the proper location, as shown in Listing 1. You must modify this script to replace MyMessageApp.app with the name of your iMessage app bundle, and to replace MyFramework.framework with the name of your framework.

Listing 1  Shell script to move the framework to the app bundle

if [ "${DEPLOYMENT_LOCATION}" = "YES" ] ; then

    FRAMEWORKS_DIR="${DSTROOT}/Applications/MyMessageApp.app/Frameworks"

else

    FRAMEWORKS_DIR="${BUILT_PRODUCTS_DIR}/MyMessageApp.app/Frameworks"

fi

rm -rf "${FRAMEWORKS_DIR}/MyFramework.framework"

mkdir -p "${FRAMEWORKS_DIR}"

cp -r "${BUILT_PRODUCTS_DIR}/MyFramework.framework" "${FRAMEWORKS_DIR}"

Code Signing Considerations

In order to run an iMessage App on a device, the framework must be code signed with the same signing identity used to sign the iMessage App.

If you are building the framework, you can do this by configuring the framework target to be code signed during its build. Figure 3 shows the build settings for this.

If you are not building the framework, or if configuring the framework to be signed during building is not an option, the shell script in Copying the Framework Into the App needs to call the codesign tool to sign the framework with the correct signing identity after copying the framework to the app.