我会在开头说我是 Swift 的新手。我有一个标签显示用户输入的变量，该变量已从前一个 View Controller 传递过来。该表下方是一个 TableView 。目前，tableview 正在显示我已硬编码到 View 中的一系列城市。我希望根据标签中显示的变量过滤该 TableView 。即如果标签显示“拉斯维加斯”，我希望 tableview 只显示包含“拉斯维加斯”的行。过滤是我遇到的问题。这是我目前所拥有的。

import UIKit

class ResultsViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

let cities = [
    ("Orlando", "FL, United States", "Location"),
    ("Orlando", "AR, United States", "Location"),
    ("Orlando", "KY, United States", "Location"),
    ("Orlando", "NC, United States", "Location"),
    ("Orlando", "OK, United States", "Location"),
    ("Orlando", "NY, United States", "Location"),
    ("Orlando", "VA, United States", "Location"),
    ("Orlando", "WV, United States", "Location"),
    ("Las Vegas", "NV, United States", "Location"),
    ("Las Vegas", "TX, United States", "Location"),
    ("Las Vegas", "NM, United States", "Location"),
    ("Scottsdale", "AZ, United States", "Location"),
    ("Scottsdale Plaza", "PA, United States", "Location"),
    ("Scottsdale Pond", "CA, United States", "Location"),
    ("Scottsdale Park", "IL, United States", "Location")]



public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return(cities.count)
}

public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! ResultsControllerTableViewCell
    let (labelCity, labelState, labelType) = cities[indexPath.row]
    cell.cityName.text = labelCity
    cell.stateName.text = labelState
    cell.resultType.text = labelType
    return(cell)
}

@IBOutlet weak var userSearchInputLabel: UILabel!

var searchItem = String()



override func viewDidLoad() {

    super.viewDidLoad()
    self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: .default)
    self.navigationController?.navigationBar.shadowImage = UIImage()
    self.navigationController?.navigationBar.isTranslucent = true
    userSearchInputLabel.text = searchItem
     self.extendedLayoutIncludesOpaqueBars=true;

}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

override func viewWillAppear(_ animated: Bool)
{
    super.viewWillAppear(animated)
    self.navigationItem.hidesBackButton = true
}

最佳答案

非常基本的框架代码:

public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return cities.filter { $0.contains(self.filterText) }.count
}

public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! ResultsControllerTableViewCell
    let (labelCity, labelState, labelType) = cities.filter { $0.contains(self.filterText) }[indexPath.row]
    cell.cityName.text = labelCity
    cell.stateName.text = labelState
    cell.resultType.text = labelType
    return(cell)
}

public func textViewDidChange(sender: UITextView, newText: String) {
    self.filterText = newText
    self.tableView.reloadData()
}

我在没有 IDE 的情况下编写了这个代码，可能有一些语法错误，但基本上改变了你的 tableview 以根据一些 filterText 进行过滤，只要 textview 更新，这些 filterText 就会更新。

关于ios - Swift 3 - 基于字符串变量的过滤数组，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/44636446/