我想在uicollection View 上方放置一个搜索栏，如下图所示。我想以编程方式执行此操作。
目前看来
这是我的搜索栏设置功能代码。我在主 View Controller 中有它。
func setupSearchBar() {
let searchBar = UISearchBar(frame: CGRect(x: 0, y: 64, width:UIScreen.main.bounds.width, height: 32))
searchBar.barTintColor = UIColor(red: 64/255, green: 64/255, blue: 64/255, alpha: 1)
searchBar.backgroundColor = UIColor.blue
searchBar.isTranslucent = true
searchBar.placeholder = "Search Timeline"
searchBar.searchBarStyle = UISearchBarStyle.prominent
view.addSubview(searchBar)
}
最佳答案
您可以将搜索栏添加到UICollectionview header 中。
这将以编程方式创建searchBar
lazy var searchBar : UISearchBar = {
let s = UISearchBar()
s.placeholder = "Search Timeline"
s.delegate = self
s.tintColor = .white
s.barTintColor = // color you like
s.barStyle = .default
s.sizeToFit()
return s
}()
接下来，在您的 View 中加载了注册头 View 。
collectionView?.register(UICollectionViewCell.self, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: "headerCellId")
覆盖以下方法，以定义 header 的高度。
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize {
return CGSize(width: view.frame.width, height: 40)
}
最后，将搜索栏添加到UICollectionview header 中，定义约束以适合整个 header View 。
override func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
let header = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "headerCellId", for: indexPath)
header.addSubview(searchBar)
searchBar.translatesAutoresizingMaskIntoConstraints = false
searchBar.leftAnchor.constraint(equalTo: header.leftAnchor).isActive = true
searchBar.rightAnchor.constraint(equalTo: header.rightAnchor).isActive = true
searchBar.topAnchor.constraint(equalTo: header.topAnchor).isActive = true
searchBar.bottomAnchor.constraint(equalTo: header.bottomAnchor).isActive = true
return header
}
关于ios - 如何使搜索栏在uicollectionview中工作，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/44742957/