我有一个数组,例如[“ apple”,“ appear”,“ Azhar”,“ code”,“ BCom”]等。该数组包含超过一半的记录。
现在,我要在Google中放置一个UISearchBar
,然后每当用户键入文本时,就会出现下拉列表,其中包含该文本的所有结果,用户可以从中选择一个列表。
例如-如果用户键入“ a”,则在下拉列表中将出现“ apple”,“ appear”和“ Azhar”。
我不想使用UITableView
或其他任何东西来加载记录。每当用户键入任何单词时,它都应该从数组中收集记录,并下拉菜单以显示它们。
我该怎么做? 请提供建议。
答案 0 :(得分:5)
相当简单的代码就可以解决问题,搜索栏过滤器很简单,至于下拉菜单,我使用了一个名为'DropDown'的第三方Pod,它非常易于使用:https://github.com/AssistoLab/DropDown
import UIKit
import DropDown
class ViewController: UIViewController, UISearchBarDelegate {
var data: [String] = ["apple","appear","Azhar","code","BCom"]
var dataFiltered: [String] = []
var dropButton = DropDown()
@IBOutlet weak var searchBar: UISearchBar!
override func viewDidLoad() {
super.viewDidLoad()
dataFiltered = data
dropButton.anchorView = searchBar
dropButton.bottomOffset = CGPoint(x: 0, y:(dropButton.anchorView?.plainView.bounds.height)!)
dropButton.backgroundColor = .white
dropButton.direction = .bottom
dropButton.selectionAction = { [unowned self] (index: Int, item: String) in
print("Selected item: \(item) at index: \(index)") //Selected item: code at index: 0
}
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
dataFiltered = searchText.isEmpty ? data : data.filter({ (dat) -> Bool in
dat.range(of: searchText, options: .caseInsensitive) != nil
})
dropButton.dataSource = dataFiltered
dropButton.show()
}
func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
searchBar.setShowsCancelButton(true, animated: true)
for ob: UIView in ((searchBar.subviews[0] )).subviews {
if let z = ob as? UIButton {
let btn: UIButton = z
btn.setTitleColor(UIColor.white, for: .normal)
}
}
}
func searchBarTextDidEndEditing(_ searchBar: UISearchBar) {
searchBar.showsCancelButton = false
}
func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
searchBar.resignFirstResponder()
searchBar.text = ""
dataFiltered = data
dropButton.hide()
}
}