hi after crashing i set the exception break point by pressing break point symbol and i choose objective c language while editing the break point. I run it again ,app is cras
Ok than try using enabling zombie environment.
Follow these steps:

+ button at bottom part. Click on that button and add varialbe NSZombieEnabled with value YES. 

Click close and again run your project, hope this will track down zombie objects at runtime which cause runtime crash.