我学习了如何在导航控制器中实现自定义选项卡寻呼机的教程。我的设置是这样的。在BuyStatsTapper（右侧）上，您应该看到可以在“购买”和“竞赛”之间切换。
这基本上是通过根据单击的子选项卡实例化视图控制器来工作的。问题是我在这个类中也有需要传递给实例化控制器的数据（我已经成功地从上一个view controller prepare for segue方法设置了'var selectedPlayerBuyStats'。
在“updateView（）”的底部，我想我找到了一种方法，因为我可以访问子视图控制器tableview来设置其大小和维度。我已经把不起作用的台词注释掉了。IDE成功地找到了我需要设置的子视图控制器的属性，但当我实际尝试获取子视图控制器中的数据时，它为零。有没有别的方法可以让我试着去做？谢谢
import UIKit
class BuyStatsTabPager: BuyStats{
@IBOutlet var segmentedControl: UISegmentedControl!
@IBOutlet weak var scoreKey: UIBarButtonItem!
@IBOutlet weak var standings: UIBarButtonItem!
var selectedPlayerBuyStats: Player! = nil
override func viewDidLoad() {
navigationController?.navigationBar.barTintColor = UIColor(red: 27/255, green: 27/255, blue: 27/255, alpha: 1)
scoreKey.setTitleTextAttributes([NSFontAttributeName: UIFont(name: "Helvetica", size: 13.0)!], for: UIControlState.normal)
scoreKey.tintColor = UIColor.blue
standings.setTitleTextAttributes([NSFontAttributeName: UIFont(name: "Helvetica", size: 13.0)!], for: UIControlState.normal)
standings.tintColor = UIColor.blue
setupView()
}
private func setupView() {
setupSegmentedControl()
updateView()
}
private func setupSegmentedControl() {
// Configure Segmented Control
segmentedControl.removeAllSegments()
segmentedControl.insertSegment(withTitle: "Buy", at: 0, animated: false)
segmentedControl.insertSegment(withTitle: "Score", at: 1, animated: false)
segmentedControl.addTarget(self, action: #selector(selectionDidChange(_:)), for: .valueChanged)
segmentedControl.selectedSegmentIndex = 0
}
func selectionDidChange(_ sender: UISegmentedControl) {
updateView()
}
private lazy var viewContestTab: BuyStatsTab = {
// Load Storyboard
let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)
// Instantiate View Controller
var viewController = storyboard.instantiateViewController(withIdentifier: "BuyStatsTab") as! BuyStatsTab
// Add View Controller as Child View Controller
self.add(asChildViewController: viewController)
return viewController
}()
private lazy var viewRoundTab: BuyStatsContestTab = {
// Load Storyboard
let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)
// Instantiate View Controller
var viewController = storyboard.instantiateViewController(withIdentifier: "BuyStatsContestTab") as! BuyStatsContestTab
// Add View Controller as Child View Controller
self.add(asChildViewController: viewController)
return viewController
}()
private func add(asChildViewController viewController: UIViewController) {
// Add Child View Controller
addChildViewController(viewController)
// Add Child View as Subview
view.addSubview(viewController.view)
// Configure Child View
viewController.view.frame = view.bounds
viewController.view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
// Notify Child View Controller
viewController.didMove(toParentViewController: self)
}
private func remove(asChildViewController viewController: UIViewController) {
// Notify Child View Controller
viewController.willMove(toParentViewController: nil)
// Remove Child View From Superview
viewController.view.removeFromSuperview()
// Notify Child View Controller
viewController.removeFromParentViewController()
}
private func updateView() {
if segmentedControl.selectedSegmentIndex == 0 {
//this is working so I have the data I need to pass
print(selectedPlayerBuyStats.p)
let position = viewRoundTab.tableView.contentOffset.y;
viewContestTab.tableView.contentOffset = CGPoint(x:0, y:position);
//but it isn't working this way
//viewContestTab.selectedPlayer = selectedPlayerBuyStats
remove(asChildViewController: viewRoundTab)
add(asChildViewController: viewContestTab)
} else {
print(selectedPlayerBuyStats.Name)
let position = viewContestTab.tableView.contentOffset.y;
viewRoundTab.tableView.contentOffset = CGPoint(x:0, y:position);
//viewRoundTab.selectedPlayer = selectedPlayerBuyStats
remove(asChildViewController: viewContestTab)
add(asChildViewController: viewRoundTab)
}
}
}
编辑：
所以我试图在tab pager类中使用prepare for segue，但仍然有问题。一。我不知道如何检查数据应该转到哪个子类。2。即使我像这样发送给第一个子类，数据在另一边仍然是零。
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let buyStats = segue.destination as! BuyStatsTab
buyStats.selectedPlayer = selectedPlayer
}
这是第一个收件人子视图控制器。
class BuyStatsTab: UIViewController, UITableViewDelegate, UITableViewDataSource{
@IBOutlet var tableView: UITableView!
let cellReuseIdentifier = "cell"
var stats = [BuyStat]()
var selectedPlayer: Player! = nil
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: cellReuseIdentifier)
self.tableView.rowHeight = 70.0
self.tableView.tableFooterView = UIView()
tableView.delegate = self
tableView.dataSource = self
stats = [
BuyStat(purchaseAmount: 0.0, category: "Pts", average: selectedPlayer.p, price: "$75"),
BuyStat(purchaseAmount: 0.0, category: "Reb", average: 6.5, price: "$175"),
BuyStat(purchaseAmount: 0.0, category: "Ast", average: 6.7, price: "$200"),
BuyStat(purchaseAmount: 0.0, category: "Stl", average: 2.2, price: "$300"),
BuyStat(purchaseAmount: 0.0, category: "Blk", average: 0.4, price: "$325"),
BuyStat(purchaseAmount: 0.0, category: "3pt", average: 3.3, price: "$325"),
BuyStat(purchaseAmount: 0.0, category: "TO", average: 2.4, price: "$350")]
tableView.reloadData()
}
数组中的selectedPlayer.p应该有数据。
最佳答案
根据评论，我得到了确切的答案。我只需要在惰性变量viewContentTab中设置数据，而不是在updateView（）中进一步向下设置。我认为在updateView（）中执行该操作是可行的，因为教程让我从那里访问tableview。我仍然不确定为什么我可以访问updateView（）中的tableview，但不能设置其他数据。如果有人认为这值得一个更好的解释，我会很乐意给他们最好的答案。
private lazy var viewRoundTab: BuyStatsContestTab = {
let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)
var viewController = storyboard.instantiateViewController(withIdentifier: "BuyStatsContestTab") as! BuyStatsContestTab
viewController.selectedPlayer = self.selectedPlayerBuyStats
self.add(asChildViewController: viewController)
return viewController
}()
关于ios - Swift-无法通过导航 Controller 中的“自定义标签页”传递数据，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/43327656/