Well, the clue is in the error message:
Failed to set hint 'HINT_MAX_SIMULTANEOUS_IMAGE_TARGETS' because the ImageTracker has not been initialized.
If the Image Tracker has not been initialised, it is up to you to find out why not.
Although in theory it is ideal to hope that just because it works in Android, it should work in iOS. This holds true for the samples, which if you compile and run will run perfectly first time.
Please try this first to give you some confidence.
Next, as I suggested below:
Chances are that you have an old project that you have tried to upgrade from a previous version of Vuforia.
If this happens then it can be possible that the PostProcessBuildPlayer step does not work correctly. This is responsible for creating the XCode project, inserting the Vuforia code and linking up with the libraries. So while you may have fixed the linker errors, your project may still have underlying problems which you may not yet have addressed.
If all else fails, try creating the project from scratch again.