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                                            kiGleen

滚动时候出现空白，indexPathForItemAtPoint计算时NSIndexPath为nil导致的row一直为0，_addRightCount一直为1的问题

导致问题的原因是CGPointMake(self.frame.size.width - 1,0)的y为0;不能获取到NSIndexPath；将_addRightCount = [_collectionView indexPathForItemAtPoint:CGPointMake(self.frame.size.width - 1, 0)].row + 1 ; 改为 _addRightCount = [_collectionView indexPathForItemAtPoint:CGPointMake(self.frame.size.width - 1, self.frame.size.height / 2.0)].row + 1 ; 同理_addRightCount = [_collectionView indexPathForItemAtPoint:CGPointMake(0,...