iPad generating pdf crashes - objective-c

I am trying to generate PDF reports with more than 300 pages from my app,but after long time the app is crashing without showing anything in the console, i am not getting memory warnings also, please help me to fix this issue.Thanks in advance

First of let me know ... what do you add in PDF.. i.e. can you add images ? or only text Please explain...if you can add images then it would be crash in 300 pages.. and it required Compress the image file size.. Let me know first of all..or possible to show your code.. i will help you...

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This is the error that Im getting
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Please refer to this link,
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How to select text in PDF file in objective c?

I am right now working with one pdf based application in ipad. Now i am able to display the pdf file in the ipad,but now i want to show some annotation based operations on the same pdf file. and for the same purpose,i need to select the text.Is there any function available that may help to select the text to perform the operations?
Thanks in advance.
EDIT :
I surfed net and found some code that was helpful for UITouch in the following link
but am not getting way to implement it for my purpose. Can Somebody show me a path?
Kindly show me a path.
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