在UITableView节标题中固定UILabel

Question

我在UITableView节标题中出现UILabel（变量名称：wrongCountLabel）未对齐的情况，因为它以编程方式设置为固定的x和y坐标。这些坐标适用于较小的屏幕，但在较大的屏幕上却缺少右侧（请参见下面的屏幕转储）。

自从我在代码中创建了节标题以来，我试图以编程方式将“ Wrong（times）”标签的后沿锚定到UITableView的后沿。当我运行该小部件时，它说它无法加载数据。

//
//  TodayViewController.swift
//  Widget
//
//  Created by on 10/02/2019.
//  Copyright © 2019. All rights reserved.
//

import UIKit
import NotificationCenter

class TodayViewController: UIViewController, NCWidgetProviding, UITableViewDataSource, UITableViewDelegate {

    @IBOutlet weak var tableView: UITableView!

    var words = [String]()
    var sortedPracticeWords = [String]()
    var chosenLanguage = String()
    let wordsString = "Words"

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view from its nib.
        if let defaults = UserDefaults(suiteName: "group.co.uk.tirnaelectronics.polyglot") {
            if let savedLanguage = defaults.object(forKey: "languageChosen") as? String {
                print("savedLanguage is: \(savedLanguage)")
                chosenLanguage = savedLanguage
                if let savedWords = defaults.object(forKey: "\(chosenLanguage)\(wordsString)") as? [String] {
                    words = savedWords
                }
            }
        }
        extensionContext?.widgetLargestAvailableDisplayMode = .expanded

        sortPracticeWords()
    }

    func widgetActiveDisplayModeDidChange(_ activeDisplayMode: NCWidgetDisplayMode, withMaximumSize maxSize: CGSize) {
        if activeDisplayMode == .compact {
            preferredContentSize = CGSize(width: 0, height: 110)
        } else {
            preferredContentSize = CGSize(width: 0, height: 440)
        }
    }

    func widgetPerformUpdate(completionHandler: (@escaping (NCUpdateResult) -> Void)) {
        // Perform any setup necessary in order to update the view.

        // If an error is encountered, use NCUpdateResult.Failed
        // If there's no update required, use NCUpdateResult.NoData
        // If there's an update, use NCUpdateResult.NewData

        completionHandler(NCUpdateResult.newData)
    }

    func sortPracticeWords() {
        var practiceWords = [String]()

        for i in 1..<words.count {
            if Int(words[i - 1].components(separatedBy: "::")[2]) ?? 0 > 0 {
                practiceWords.append(words[i - 1])
            }
        }
        var sortedAboveIndex = practiceWords.count
        var swaps = 0
        var tempPracticeWord = String()

        repeat {
            var lastSwapIndex = 0

            for i in 1..<sortedAboveIndex {
                if Int(practiceWords[i - 1].components(separatedBy: "::")[2])! < Int(practiceWords[i].components(separatedBy: "::")[2])! {
                    tempPracticeWord = practiceWords[i]
                    practiceWords[i] = practiceWords[i - 1]
                    practiceWords[i - 1] = tempPracticeWord
                    lastSwapIndex = i
                    swaps += 1
                }
            }
            sortedAboveIndex = lastSwapIndex
        } while (sortedAboveIndex != 0)
        sortedPracticeWords = practiceWords
        print("sortedPracticeWords are: \(sortedPracticeWords)")
        print("practiceWords is sorted in \(swaps) swaps.")
    }

    func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

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

    internal func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
        let view = UIView()
        view.backgroundColor = UIColor(white: 1, alpha: 0.2)

        let languageLabel = UILabel()
        languageLabel.text = "\(chosenLanguage.capitalized)"
        languageLabel.frame = CGRect(x: 10, y: 5, width: 170, height: 20)
        //languageLabel.leadingAnchor.constraint(equalTo: tableView.layoutMarginsGuide.leadingAnchor).isActive = true
        view.addSubview(languageLabel)
        let wrongCountLabel = UILabel()
        wrongCountLabel.text = "Wrong (times)"
        wrongCountLabel.textAlignment = .left
        wrongCountLabel.frame = CGRect(x: 180, y: 5, width: 120, height: 20)
        //wrongCountLabel.trailingAnchor.constraint(equalTo: tableView.layoutMarginsGuide.trailingAnchor).isActive = true
        view.addSubview(wrongCountLabel)

        return view
    }

    func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
        return 30
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell:TodayCustomCell = self.tableView.dequeueReusableCell(withIdentifier: "PracticeWord") as! TodayCustomCell

        let sortedPracticeWord = sortedPracticeWords[indexPath.row]
        print("practiceWord is: \(sortedPracticeWord)")

        let split = sortedPracticeWord.components(separatedBy: "::")

        cell.practiceWord.textColor = UIColor(white: 1, alpha: 0.75)

        cell.selectedBackgroundView = UIView()
        cell.selectedBackgroundView!.backgroundColor = UIColor(white: 1, alpha: 0.20)

        cell.practiceWord.frame = CGRect(origin: CGPoint(x: 10, y: 10), size: CGSize(width: 200, height: 40))
        cell.wrongCount.frame = CGRect(origin: CGPoint(x: 210, y: 10), size: CGSize(width: 100, height: 40))

        cell.practiceWord?.text = split[1]
        cell.wrongCount?.text = split[2]

        print("cell is: \(cell)")
        return cell
    }

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        tableView.deselectRow(at: indexPath, animated: true)

        /*if let cell = tableView.cellForRow(at: indexPath) {
            let practiceWord = sortedPracticeWords[indexPath.row]
            let split = practiceWord.components(separatedBy: "::")
            cell.detailTextLabel?.text = split[2]
            print("Detail cell is: \(cell)")
        }*/
    }
}

右手屏幕应该像左手屏幕一样显示，只是在更大的屏幕上显示。

我需要一些锚定UILabel的代码，以便无论用户的屏幕大小如何，它们都能工作。

Answer 1

会改变：

wrongCountLabel.textAlignment = .left

收件人

wrongCountLabel.textAlignment = .right

帮助？