想要快速创建像Google这样的搜索栏

时间:2018-08-10 15:14:17

标签: swift xcode uisearchbar searchbar

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。

1 个答案:

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()
}
}

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