ios - UICollectionView and willDisplayCell/SupplementaryView in iOS7 -

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as see in documentation methods:

- (void)collectionview:(uicollectionview *)collectionview willdisplaycell:(uicollectionviewcell *)cell foritematindexpath:(nsindexpath *)indexpath ns_available_ios(8_0); - (void)collectionview:(uicollectionview *)collectionview willdisplaysupplementaryview:(uicollectionreusableview *)view forelementkind:(nsstring *)elementkind atindexpath:(nsindexpath *)indexpath ns_available_ios(8_0);

are available ios8, need perform actions supplementaryview begin displayed in ios7. how can achieve it?


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