ios - indexPath.row 总是返回零

Question

我有两个 Collection View ，一个显示姓名，另一个显示相应人员的年龄。此数据以 "[["Name","Age"],["Name": "Daniel", "Age": "20"],["Name":"Jake"] 的形式存储在字典数组中"Age":"20"]]。此数据来自 CSV 文件，因此第一个元素是标题。在 collectionView cellForItemAtIndexPath 内部，我正在检查 Collection View 并提供基于行号的数据库，如 cell[indexPath.row] ["Name"] 和 cell2[indexPath.row]["Age"]。但是，indexPath.row 总是返回零，所以我得到的只是标题 -

如何解决这个问题？这是我的代码-

func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
    return 2
}

func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return 1
}

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {

    if collectionView == self.nameCollectionView {
        let nameCell = collectionView.dequeueReusableCellWithReuseIdentifier("NameCell", forIndexPath: indexPath) as! NameCell

        nameCell.data.text = self.data?[indexPath.row]["Name"]
        println(indexPath.row)

        return nameCell
    }
    else{
        let ageCell = collectionView.dequeueReusableCellWithReuseIdentifier("AgeCell", forIndexPath: indexPath) as! AgeCell

        ageCell.data.text = self.data?[indexPath.row]["Age"]



        return ageCell
    }

}

Answer 1

作为您的代码，您将 numberOfItemsInSection 设置为仅 1，那么您总是获得第 0 个索引。使有动态值，例如返回 Array.count。

func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return self.data.count  // here you need to set dynamic count of array
}

更新:

如果您遵循了numberOfSectionsInCollectionView，那么您的代码将类似于cellForRow:

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {

    if collectionView == self.nameCollectionView {
        let nameCell = collectionView.dequeueReusableCellWithReuseIdentifier("NameCell", forIndexPath: indexPath) as! NameCell

        nameCell.data.text = self.data?[indexPath.section]["Name"]
        println(indexPath.section)

        return nameCell
    }
    else{
        let ageCell = collectionView.dequeueReusableCellWithReuseIdentifier("AgeCell", forIndexPath: indexPath) as! AgeCell

        ageCell.data.text = self.data?[indexPath.section]["Age"]



        return ageCell
    }

}