-[_UIFlowLayoutItem setSizeEstimated:]: message sent to deallocated instance 0x138f6f850 #11
Description
When i used the code : self.collectionView.collectionViewContentSize.height , my app crashed with the log *** -[_UIFlowLayoutItem setSizeEstimated:]: message sent to deallocated instance 0x138f6f850 .I don't know why