我有一个UIViewController,它根据屏幕上的所需选项实例化一些UITableViewCell。这些选项之一是“指令”,我创建了一个.XIB文件以在屏幕上显示指令。但是,在这个屏幕上,我有一个按钮来显示更多指令(在另一个屏幕上)。因此,我使用指令创建了另一个.XIB文件,我需要从第一个指令屏幕转到该文件。我该怎么办?
这是我的代码:
import UIKit
class FirstInstructionsCell: UITableViewCell {
@IBOutlet weak var showSecondInstructions: UIButton!
var secondInstructionsView: SecondInstructions!
static let FIRST_INSTRUCTIONS_CELL_IDENTIFIER = "FirstInstructionsCell"
@IBAction func showSecondInstructionsTapped(_ sender: UIButton) {
print("Here I need to go to SecondInstructions screen")
}
}
更改后,我的UIViewController:
import UIKit
class FirstInstructionsViewController: UIViewController, FirstInstructionsCellDelegate {
func goSecondScreen() {
presentViewController(SecondInstructions, animated: true, completion: nil)
// Here I have an error: Cannot convert value of type 'SecondInstructions.Type' to expected argument type 'UIViewController'
// 'SecondInstructions' is a UITableViewCell
}
@IBOutlet weak var confirmButton: UIButton!
@IBOutlet weak var tableView: UITableView!
var withdrawalCode: Int!
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.register(UINib(nibName: FirstInstructionsCell.FIRST_INSTRUCTIONS_CELL_IDENTIFIER, bundle: nil), forCellReuseIdentifier: FirstInstructionsCell.FIRST_INSTRUCTIONS_CELL_IDENTIFIER)
self.tableView.rowHeight = UITableView.automaticDimension
self.tableView.estimatedRowHeight = 470.0
}
//MARK: - Actions
@IBAction func onConfirmClicked(_ sender: UIButton) {
self.navigationController?.popViewController(animated: true)
}
}
// MARK: - UITableViewDelegate
extension FirstInstructionsViewController: UITableViewDelegate {
func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
return 13.0
}
func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return 142.0
}
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
return PayPaxxHeaderView.loadFromNib(CGRect(x: 0, y: 0, width: self.view.bounds.width, height: 142.0)) as! PayPaxxHeaderView
}
}
// MARK: - UITableViewDataSource
extension FirstInstructionsViewController: UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = self.tableView.dequeueReusableCell(withIdentifier: FirstInstructionsCell.FIRST_INSTRUCTIONS_CELL_IDENTIFIER, for: indexPath) as! FirstInstructionsCell
cell.fillCell(self.withdrawalCode)
cell.delegate = self
return cell
}
}
答案 0 :(得分:3)
据我了解,您需要转到另一个屏幕。为什么不为此使用protocol
?
import UIKit
protocol FirstInstructionsCellDelegate {
func goToSecondScreen()
}
class FirstInstructionsCell: UITableViewCell {
@IBOutlet weak var showSecondInstructions: UIButton!
var secondInstructionsView: SecondInstructions!
var delegate : FirstInstructionsCellDelegate?
static let FIRST_INSTRUCTIONS_CELL_IDENTIFIER = "FirstInstructionsCell"
@IBAction func showSecondInstructionsTapped(_ sender: UIButton) {
print("Here I need to go to SecondInstructions screen")
delegate?.goToSecondScreen()
}
}
然后,在您的cellForRow(at:indexPath:)
中,您可以说(出队后):
cell.delegate = self
您的viewController
需要实现它:
class FirstInstructionViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, FirstInstructionsCellDelegate {
,然后在该View Controller中实现上述功能:
func goToSecondScreen() {
let story = UIStoryboard(named: "SecondScreen", bundle: nil)
let viewController = story.instantiateViewController(withIdentifier: "SecondScreen")
self.navigationController?.pushViewController(viewController, animated: true)
// or
self.present(viewController, animated: true, completion: nil)
}
注意:
您需要在界面构建器中设置情节提要标识符。