ios – 如何使用swift在集合视图中使页眉和页脚

如何使 swift中的标题和页脚在集合视图中？

我试图将标题和页脚组合在一起,但它仍然崩溃,我找不到迅速的教程来了解它.

我不怎么回复补充意见,而不只是一个.

我把它们都放在故事板上(类标识符)

override func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
    //#warning Incomplete method implementation -- Return the number of sections
    return 2
}


override func collectionView(collectionView: UICollectionView,numberOfItemsInSection section: Int) -> Int {
    //#warning Incomplete method implementation -- Return the number of items in the section
    return 10
}




override func collectionView(collectionView: UICollectionView,viewForSupplementaryElementOfKind kind: String,atIndexPath indexPath: NSIndexPath) -> UICollectionReusableView {
    var header: headerCell!
    var footer: footerCell!



    if kind == UICollectionElementKindSectionHeader {
        header =
            collectionView.dequeueReusableSupplementaryViewOfKind(kind,withReuseIdentifier: "header",forIndexPath: indexPath)
            as? headerCell

}
    return header

}

Error:
UICollectionElementKindCell with identifier one – must register a nib or a class for the identifier or connect a prototype cell in a storyboard’

override func collectionView(collectionView: UICollectionView,cellForItemAtIndexPath indexPath: NSIndexPath) -> profileCC {
    let cell = collectionView.dequeueReusableCellWithReuseIdentifier("one",forIndexPath: indexPath) as! profileCC

    // Configure the cell

    return cell
}



override func collectionView(collectionView: UICollectionView,atIndexPath indexPath: NSIndexPath) -> UICollectionReusableView {

    switch kind {

    case UICollectionElementKindSectionHeader:

        let headerView = collectionView.dequeueReusableSupplementaryViewOfKind(kind,forIndexPath: indexPath) as! headerCell

        headerView.backgroundColor = UIColor.blueColor();
        return headerView

    case UICollectionElementKindSectionFooter:
        let footerView = collectionView.dequeueReusableSupplementaryViewOfKind(kind,withReuseIdentifier: "footer",forIndexPath: indexPath) as! footerCell

        footerView.backgroundColor = UIColor.greenColor();
        return footerView

    default:

        assert(false,"Unexpected element kind")
    }
}

我希望有人会帮忙.

解决方法

您可以使UICollectionViewController处理UICollectionView,并在Interface Builder中激活页脚和页眉部分,然后可以使用以下方法预览UICollectionView添加的两个部分：

override func collectionView(collectionView: UICollectionView,withReuseIdentifier: "Header",forIndexPath: indexPath) as! UICollectionReusableView

        headerView.backgroundColor = UIColor.blueColor();
        return headerView

    case UICollectionElementKindSectionFooter:
        let footerView = collectionView.dequeueReusableSupplementaryViewOfKind(kind,withReuseIdentifier: "Footer",forIndexPath: indexPath) as! UICollectionReusableView

        footerView.backgroundColor = UIColor.greenColor();
        return footerView

    default:

        assert(false,"Unexpected element kind")
    }
}

在上面的代码中,我将页脚和标题的标识符作为页眉和页脚为例,你可以按照要求进行操作.如果要创建自定义页眉或页脚,则需要为每个页面创建一个UICollectionReusableView子类,并根据需要进行自定义.

您可以在Interface Builder中或以下列方式在代码中注册自定义页脚和标题类：

registerClass(myFooterViewClass,forSupplementaryViewOfKind: UICollectionElementKindSectionFooter,withReuseIdentifier: "myFooterView")