我是一名入门级敏捷开发人员,正在个人应用程序中工作,但是我的“ tableViewController”出现了问题。
我有一个第一张表视图,我在其中从API中获取一些事件,然后,我试图做的就是每当选择一个事件时都显示一个“ detailViewController”。到目前为止,一切似乎都很完美,但是我的问题是我的“ detailsviewcontroller”具有事件的图像,标题...以及集成的“ tableview”以显示详细信息。此时,numberOfRowsInSection函数可以工作,但是从未调用cellForRowAt来填充集成的表视图。有什么帮助吗?我希望我的解释很清楚
这是“ childtableview”的代码,我想在其中显示事件详细信息(我正在尝试使用数组字符:
import UIKit
import SwiftyJSON
class ChildDetailsViewController: UIViewController, UITableViewDelegate {
var event: JSON?
let detailsTableView = UITableView()
var characters = ["test1", "test2", "test3", "test4"]
override func loadView() {
print("details")
super.loadView()
view.addSubview(detailsTableView)
detailsTableView.translatesAutoresizingMaskIntoConstraints = false
detailsTableView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
detailsTableView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true
detailsTableView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
detailsTableView.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true
detailsTableView.register(UITableViewCell.self, forCellReuseIdentifier: "cell")
detailsTableView.dataSource = self
detailsTableView.delegate = self
detailsTableView.reloadData()
}
}
extension ChildDetailsViewController: UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
//this insctruction does print 4
print(characters.count)
//but it doesn't return 4 cells in the tableview
return characters.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
print(characters[indexPath.row])
cell.textLabel?.text = characters[indexPath.row]
return cell
}
}
以及这里的detailsViewController的代码,其中包含图像和标题以及子tableview:
import UIKit
import SwiftyJSON
class EventDetailsViewController: UIViewController {
var event : JSON?
@IBOutlet weak var segmentedController: UISegmentedControl!
@IBOutlet weak var ticketsView: UIView!
@IBOutlet weak var locationView: UIView!
@IBOutlet weak var detailsView: UIView!
@IBOutlet weak var eventImage: UIImageView!
@IBOutlet weak var eventTitle: UILabel!
let newView = UIView()
let childDetails = ChildDetailsViewController()
var views : [UIView]!
override func viewDidLoad() {
filltheImageAndTile()
// add new view to the main view
super.viewDidLoad()
view.addSubview(newView)
//locate it under the event image and the segnented controller
newView.translatesAutoresizingMaskIntoConstraints = false
newView.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
newView.topAnchor.constraint(equalTo: segmentedController.bottomAnchor, constant: 25).isActive = true
newView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
newView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
views = [UIView]()
views.append(ChildDetailsViewController().view)
views.append(ChildLocationViewController().view)
for itemView in views {
newView.addSubview(itemView)
}
newView.bringSubviewToFront(ChildDetailsViewController().view)
}
@IBAction func segmentedControlOptionChanged(_ sender: UISegmentedControl) {
newView.bringSubviewToFront(views[sender.selectedSegmentIndex])
}
@IBAction func backButtonClicked(_ sender: UIBarButtonItem) {
self.navigationController?.dismiss(animated: true)
}
}
1-此
views.append(ChildDetailsViewController().view)
views.append(ChildLocationViewController().view)
不是添加包含的vcs检查Adding a view controller as a subview in another view controller的正确方法>
2-您需要为newView
设置高度/底部约束
问题是您正在创建ChildDetailsViewController
的实例并将其视图添加到views
数组,但是ChildDetailsViewController
的实例永远不会保存在任何地方,也永远不会将其添加到父视图控制器。并且newView.bringSubviewToFront(ChildDetailsViewController().view)
该行将无济于事,因为您正在创建一个新实例并将其视图置于最前面,但从未将其添加到超级视图中的任何位置