单元格上的按钮标题在集合视图重新加载时闪烁

Question

我有7个单元格，每个单元格都有一个按钮。当我点击button1时，button1的背景变为红色，其他所有变为蓝色（初始状态）。如果我选​​择button2，它会变为红色等变成了蓝色。为了实现，我做了以下编码：

pragma mark-button selector

-(void)doSomething:(UIButton *) sender {
    recipeHeading = (RecipeHeadingCell*)[[sender superview] superview];
    NSIndexPath *path = [_headingCollectionView indexPathForCell:recipeHeading];
    [_outerCollectionView scrollToItemAtIndexPath:path atScrollPosition:UICollectionViewScrollPositionCenteredHorizontally animated:YES];
    if(globalTag>=0){
        [allValues setObject:[NSNumber numberWithBool:NO] atIndexedSubscript:globalTag];
    }
    globalTag=path.row;
    reloadOn = true;
    [allValues setObject:[NSNumber numberWithBool:YES] atIndexedSubscript:globalTag];
    dispatch_async(dispatch_get_main_queue(), ^{
        [_headingCollectionView reloadData];
    });
}

pragma mark-collectionview datasource

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
    if(collectionView==_headingCollectionView){


        recipeHeading = (RecipeHeadingCell*)[collectionView dequeueReusableCellWithReuseIdentifier:@"headingCell" forIndexPath:indexPath];
         _headingCollectionView.delegate = self;
       [recipeHeading.headingBtn setTitle:[recipeTypeArray objectAtIndex:indexPath.row] forState:UIControlStateNormal];

        [recipeHeading.headingBtn addTarget:self action:@selector(doSomething:) forControlEvents:UIControlEventTouchUpInside];


        bool selected = [allValues[indexPath.row] boolValue];

        if(selected)
        {recipeHeading.headingBtn.backgroundColor = [UIColor redColor];
        }
        else
        {
            recipeHeading.headingBtn.backgroundColor = [UIColor blueColor];
        }

        return recipeHeading;
    }
    else if (collectionView==_outerCollectionView){
        RecipeOuterCell *outerCell =(RecipeOuterCell*)[collectionView dequeueReusableCellWithReuseIdentifier:@"outerCell" forIndexPath:indexPath];
        collectionView.pagingEnabled = true;

        return outerCell;
    }
    else{


        static NSString *simpleTableIdentifier = @"innerCell";

        RecipeInnerCell *innerCell = (RecipeInnerCell*)[collectionView dequeueReusableCellWithReuseIdentifier:simpleTableIdentifier forIndexPath:indexPath];
        // collectionView.pagingEnabled = true;
        [innerCell populateRecipeScreen:responseArray index:indexPath];
        return innerCell;

    }
}

以下是我的问题： 单击按钮，当重新加载标题集合视图并且按钮的背景颜色发生变化时，它会产生闪烁效果，即它首先显示其他indexpath.row的标题为纳秒，然后显示正确的标题。我无法获得导致问题的确切行。请提出你的建议，并帮助我克服这个问题。任何善意或帮助将不胜感激。谢谢你提前！