如何在Swift中添加UICollectionView的頁眉和頁腳視圖

我在控制器類中添加了委託函數，但它在運行時不會調用。如何在Swift中添加UICollectionView的頁眉和頁腳視圖

func collectionView(collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath: NSIndexPath) -> UICollectionReusableView { 
}

來源

2015-12-15 Robin JR

http://www.appcoda.com/supplementary-view-uicollectionview-flow-layout/ – vaibby

你已經註冊爲補充視圖類？ – rmaddy

可能重複http://stackoverflow.com/questions/29655652/how-to-make-both-header-and-footer-in-collection-view-with-swift – Khuong

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

    switch kind { 

    case UICollectionElementKindSectionHeader: 

     let headerView = collectionView.dequeueReusableSupplementaryViewOfKind(kind, 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") 
    } 
}

來源

2015-12-15 06:45:22 Nikunj5294

這個委託沒有在運行時調用 –

我打電話給：（Swift 3） 'collectionView ？.register（HeaderCollectionViewCell.self，forSupplementaryViewOfKind：UICollectionElementKindSectionHeader，withReuseIdentifier：「HeaderCell」）我仍然無法調用委託！ – rn3sto

委託方法不叫，因爲你需要註冊爲補充視圖類;

yourCollectionView.registerClass(UICollectionReusableView.self, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: "collectionHeaderID") 

yourCollectionView.registerClass(UICollectionReusableView.self, forSupplementaryViewOfKind: UICollectionElementKindSectionFooter, withReuseIdentifier: "collectionFooterID")

來源

2016-11-24 09:01:56

如果使用自定義UICollectionViewFlowLayout

集headerReferenceSize

let flowLayout = UICollectionViewFlowLayout() 
    flowLayout.scrollDirection = .vertical 
    flowLayout.minimumLineSpacing = 0 
    flowLayout.minimumInteritemSpacing = 0 
    flowLayout.sectionHeadersPinToVisibleBounds = true 
    flowLayout.headerReferenceSize = CGSize(width:  self.collectionView.frame.size.width, height: 50)

來源

2016-12-15 09:13:43

我按照這個教程Appcoda tutorial和更新代碼爲SWIFT 4.0

註冊類：

self.collectionView.register(HeadView.self, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: "HeadView")

名

代表：

// For header size (required) 
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize { 
    return CGSize(width:collectionView.frame.size.width, height:50.0) 
} 


func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView { 

    switch kind { 

    case UICollectionElementKindSectionHeader: 

     let headerView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "HeadView", for: indexPath) 

     headerView.backgroundColor = UIColor.blue; 
     return headerView 

    default: 

     fatalError("Unexpected element kind") 
    } 
}

來源

2018-01-11 08:12:20 vp2698

如何在Swift中添加UICollectionView的頁眉和頁腳視圖

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