Question

所以我在Storyboard的UICollectionViews中有两个UIViewController，并且两者都与委托和数据源链接到了我的ViewController。所有关联的UICollectionView委托方法都已实现，并且UICollectionViews的检查也已实现。但是令人沮丧的是，一个UICollectionView被照顾了，而另一个func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { if collectionView == self.variantsCollectionView { // let count = (item?.variant_groups?.count)! return 1 } else { return 2//(item?.extra_groups?.count)! } }被完全忽略了。我在所有可用方面都抓狂了，但是这使我更趋边缘，请帮忙。

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell{

        if collectionView == self.variantsCollectionView {
            //IT DOESNT EVEN COME HERE AT ALL
            let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell_variant", for: indexPath)
            return cell

        } else {
            let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
            //HERE IT COMES ALWAYS FOR THE NUMBER OF CELLS

            return cell
        }

    }

和

P.when('A').register("ImageBlockATF", function(A){

    var data = {

                'colorImages': { 'initial': 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                'colorToAsin': {'initial': {}},

                'holderRatio': 1.0,

                'holderMaxHeight': 700,

                'heroImage': {'initial': []},

                'heroVideo': {'initial': []},

                'spin360ColorData': {'initial': {}},

                'spin360ColorEnabled': {'initial': 0},

                'spin360ConfigEnabled': false,

                'spin360LazyLoadEnabled': false,

                'playVideoInImmersiveView':'false',

                'tabbedImmersiveViewTreatment':'T2',

                'totalVideoCount':'0',

                'videoIngressATFSlateThumbURL':'',

                'mediaTypeCount':'0',

                'atfEnhancedHoverOverlay' : true,

                'winningAsin': 'B07HGMDY4T',

                'weblabs' : {},

                'aibExp3Layout' : 1,

                'aibRuleName' : 'R17',

                'acEnabled' : false

                };

    A.trigger('P.AboveTheFold'); // trigger ATF event.

    return data;

});

UICollectionViews的连接方式如下：

和：

请帮助。非常感谢

Answer 1

通过以下步骤评论TS找到的解决方案：

确保两个集合视图都具有非零数据源（和委托）。
检查是否对两个集合视图都执行了数据源方法。
检查两个集合视图的单元格的大小是否有效。

最后，检查堆栈视图内每个集合视图的高度后发现了问题。

基本上CollectionView具有特定的高度，而 VariantCollectionView没有，并且都在stackView中。第一次的时候鉴于它占据了整个尺寸，而其他种实际上消失了。因此是问题。

ViewController中有多个UICollectionView不会调用一个CollectionViews委托方法

1 个答案: