崩溃EXC_CRASH (SIGABRT) unity + vuforia + ios

This is my first post.Does anyone know what error of this code? I use unity 4.6.5 with vuforia plugin 4 and xcode 6.2. Apple center reject my app because iPhone 4S running iOS 8.3-iPhone 5C running iOS 8.3- iPhone 5S running iOS 8.3- iPhone 6 running iOS 8.3-iPhone 6 Plus running iOS 8.3. Thank you for your answer.This is my first post.Does anyone know what err