objective c - My ios app is not running in iOS7 -


i have used autolayout in storyboard , working fine in ios7 before week. have altered constraints before 2 days after app not running in ios7. getting following warning in storyboard.

"automatic preferred max layout width not available on ios versions prior 8.0"

in xcode console window getting following error,

"terminating app due uncaught exception 'nsinvalidargumentexception',  reason: 'unable create description in descriptionforlayoutattribute_layoutitem_coefficient.  nil'"

could please me find solution.

thanks in advance


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