Fix execution of UIBarButtonItem blocks.
Fix execution of UIBarButtonItem blocks.

Voxer/BlocksKit,pomu0325/BlocksKit,HarrisLee/BlocksKit,Herbert77/BlocksKit,tattocau/BlocksKit,z8927623/BlocksKit,hartbit/BlocksKit,AlexanderMazaletskiy/BlocksKit,coneman/BlocksKit,TomBin647/BlocksKit,zwaldowski/BlocksKit,yimouleng/BlocksKit,anton-matosov/BlocksKit,hq804116393/BlocksKit,aipeople/BlocksKit,stevenxiaoyang/BlocksKit,xinlehou/BlocksKit,yaoxiaoyong/BlocksKit,dachaoisme/BlocksKit,shenhzou654321/BlocksKit,zxq3220122/BlocksKit-1,zhaoguohui/BlocksKit,ManagerOrganization/BlocksKit,owers19856/BlocksKit,Gitub/BlocksKit,pilot34/BlocksKit,demonnico/BlocksKit