UICollectionView隐藏/阻止细胞滚动背后粘头
问题描述:
我有粘头UICollectionView隐藏/阻止细胞滚动背后粘头
集合视图flowLayout.sectionHeadersPinToVisibleBounds = true
我的问题是,我的头的上半部分是半透明的,当我滚动我的手机了,我可以看到单元格在标题后面滚动。
我想隐藏标题后面的部分单元格视图。在附上的图片中,我不想看到红色背后的绿色。剩下的行为我想保持原样。
我之所以需要这个是我在很后面,我需要显示
@IBOutlet weak var collectionView: UICollectionView!
override func viewDidLoad() {
super.viewDidLoad()
self.collectionView.alwaysBounceVertical = true
collectionView.register(UINib.init(nibName: EXAMPLE_CELL_REUSE_ID, bundle: nil), forCellWithReuseIdentifier: EXAMPLE_CELL_REUSE_ID)
collectionView.register(UINib.init(nibName: EXAMPLE_HEADER_REUSE_ID, bundle: nil), forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: EXAMPLE_HEADER_REUSE_ID)
if let flowLayout = collectionView.collectionViewLayout as? UICollectionViewFlowLayout {
flowLayout.headerReferenceSize = CGSize(width: 400, height: 100)
flowLayout.sectionHeadersPinToVisibleBounds = true
}
}
func numberOfSections(in collectionView: UICollectionView) -> Int {
return sections.count;
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 1 //self.sections[section].1;
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let exampleCell = collectionView.dequeueReusableCell(withReuseIdentifier: EXAMPLE_CELL_REUSE_ID, for: indexPath) as! MyCellCollectionViewCell;
exampleCell.headerLabel.text = "Cell"
exampleCell.backgroundColor = UIColor.green
return exampleCell;
}
func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
if kind == UICollectionElementKindSectionHeader {
if let header = collectionView.dequeueReusableSupplementaryView(ofKind: UICollectionElementKindSectionHeader, withReuseIdentifier: EXAMPLE_HEADER_REUSE_ID, for: indexPath) as? ExampleHeader {
// header.backgroundColor = UIColor(red: 1.0, green: 0, blue: 0, alpha: 0.5)
return header
} else {
return UICollectionReusableView()
}
}
return UICollectionReusableView()
}
我觉得这里的问题可能是类似的壁纸图像,但没有回应并不清楚它是否是同一个问题。 Transparent sticky header ui collectionview don't show cells underneath
答
我已经创建了一个非常简单的设置,像你的,它工作正常。
class ViewController: UIViewController, UICollectionViewDataSource
{
@IBOutlet weak var collectionView: UICollectionView!
override func viewDidLoad()
{
super.viewDidLoad()
self.collectionView.alwaysBounceVertical = true
if let flowLayout = collectionView.collectionViewLayout as? UICollectionViewFlowLayout
{
flowLayout.headerReferenceSize = CGSize(width: 400, height: 100)
flowLayout.sectionHeadersPinToVisibleBounds = true
}
}
func numberOfSections(in collectionView: UICollectionView) -> Int
{
return 10
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
{
return 1
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
{
return collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
}
func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView
{
if kind == UICollectionElementKindSectionHeader
{
return collectionView.dequeueReusableSupplementaryView(ofKind: UICollectionElementKindSectionHeader, withReuseIdentifier: "rview", for: indexPath)
}
return UICollectionReusableView()
}
}
显示您已使用的代码。 – PGDev
除了sectionHeadersPinToVisibleBounds之外,代码是标准的。我反正张贴 –