ios - UIImageJPGRepresentation and UIImagePNGRepresentation crash -

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i have imagepicker , selecting on image want upload it. need uiimage tonsdata. have used uiimagepngrepresentation , uiimagejpegrepresentation. both of cases app crash. works simulator crash in device in second time. first time works perfect.

first, before using method debug image view object , after check length of nsdata after conversion.


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