问题描述
我有一个包含表视图的视图控制器。在这个视图控制器中，我还设置了一个浮动面板。但是，由于某种原因，浮动面板没有出现。我知道 ContentViewController 正在工作，所以我没有包含该代码。错误在这段代码的某个地方，我找不到。就像 FloatingPanel 没有被添加到视图中一样。
import Foundation
import UIKit
import FloatingPanel
class Section {
let title: String
let options: [String]
var isOpened: Bool = false
init(title: String,options: [String],isOpened: Bool
) {
self.title = title
self.options = options
self.isOpened = isOpened
}
}
class PicsViewController: UIViewController,UITableViewDelegate,UITableViewDataSource,UINavigationControllerDelegate,FloatingPanelControllerDelegate {
@IBOutlet weak var addButton: UIButton!
private let picsTableView: UITableView = {
let picsTableView = UITableView()
picsTableView.register(UITableViewCell.self,forCellReuseIdentifier: "cell")
return picsTableView
}()
private var sections = [Section]()
let backgroundColor = #colorLiteral(red: 1,green: 1,blue: 1,alpha: 1)
/*------------START FLOATING PANEL-------------*/
var fpc: FloatingPanelController!
override func viewDidLoad() {
super.viewDidLoad()
print("PicsViewController LAUNCHED!!")
fpc = FloatingPanelController()
fpc.delegate = self
// guard let contentVC = storyboard?.instantiateViewController(identifier: "fpc_content") as? ContentViewController else {
// print("Failed to instantiate storyboard")
// return
// }
let contentVC = ContentViewController()
fpc.set(contentViewController: contentVC)
// fpc.track(scrollView: contentVC.collectionView)
fpc.addPanel(toParent: self)
/*------------END FLOATING PANEL-------------*/
// Set up models
picsTableView.delegate = self
picsTableView.dataSource = self
picsTableView.frame = view.bounds
picsTableView.backgroundColor = backgroundColor
view.addSubview(picsTableView)
sections = [
Section(title: "Section 1",options: ["Test 1","Test 2","Test 3"],isOpened: false),Section(title: "Section 2",Section(title: "Section 3",Section(title: "Section 4",isOpened: false)
]
// get rid of extra table view cells
picsTableView.tableFooterView = UIView()
// customize button
addButton.layer.cornerRadius = 0.5 * addButton.bounds.size.width
addButton.clipsToBounds = true
addButton.backgroundColor = .red
addButton.tintColor = .white
addButton.setimage(#imageLiteral(resourceName: "plus-5-512"),for: .normal)
view.bringSubviewToFront(addButton)
}
@IBAction func addButtonTapped(_ sender: Any) {
print("Add button tapped")
}
func numberOfSections(in tableView: UITableView) -> Int {
return sections.count
}
func tableView(_ tableView: UITableView,numberOfRowsInSection section: Int) -> Int {
let section = sections[section]
if section.isOpened {
return section.options.count + 1
} else {
return 1
}
}
func tableView(_ tableView: UITableView,cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = picsTableView.dequeueReusableCell(
withIdentifier: "cell",for: indexPath
)
cell.backgroundColor = .clear
cell.textLabel?.textColor = .black
if indexPath.row == 0 {
cell.textLabel?.text = sections[indexPath.section].title
} else {
cell.textLabel?.text = sections[indexPath.section].options[indexPath.row - 1]
}
return cell
}
func tableView(_ tableView: UITableView,didSelectRowAt indexPath: IndexPath) {
picsTableView.deselectRow(at: indexPath,animated: true)
if indexPath.row == 0 {
sections[indexPath.section].isOpened = !sections[indexPath.section].isOpened
picsTableView.reloadSections([indexPath.section],with: .none)
} else {
print("Tapped sub cell \(indexPath.row)")
}
}
}
解决方法
通常，将任何视图控制器作为子视图添加到任何视图控制器的 3 或 4 条语句是
let viewController = SomeViewController()
self.addChild(viewController)
self.view.addSubview(viewController.view)
viewController.didMove(toParent: self)
因为您还没有为您调用 addPanel 的地方提供 fpc.addPanel(toParent: self) 的实现，所以我假设它的功能类似于我上面写的内容，如果我要写它，我可能会写一些类似的东西
func addPanel(toParent: UIViewController) {
toParent.addChild(self)
toParent.view.addSubview(self.view)
//add constraints or set frames for your subview
self.didMove(toParent: toParent)
}
最后，您要向视图控制器的视图添加多个视图，即浮动面板、tableView 和按钮。因为您在添加所有其他视图之前添加面板，它可能隐藏在其他子视图下，例如 tableView，您显然可以使用视图调试器检查这个假设，最简单的修复方法是使用 bringSubviewToFront，但问题是您没有持有 FloatingPanelController 视图的引用，因此您可以尝试添加 self.view.bringSubviewToFront(fpc.view) 作为 ViewDidLoad
override func viewDidLoad() {
super.viewDidLoad()
// all other codes of yours
self.view.bringSubviewToFront(fpc.view)
}
并且出于某种原因，如果这不起作用，则调用 fpc.addPanel(toParent: self) 作为 ViewDidLoad 的最后一条语句，而不是在它们之间添加并添加 bringSubviewToFront 作为 addPanel(toParent 方法的最后一条语句>
override func viewDidLoad() {
super.viewDidLoad()
print("PicsViewController LAUNCHED!!")
fpc = FloatingPanelController()
fpc.delegate = self
let contentVC = ContentViewController()
fpc.set(contentViewController: contentVC)
picsTableView.delegate = self
picsTableView.dataSource = self
picsTableView.frame = view.bounds
picsTableView.backgroundColor = backgroundColor
view.addSubview(picsTableView)
sections = [
Section(title: "Section 1",options: ["Test 1","Test 2","Test 3"],isOpened: false),Section(title: "Section 2",Section(title: "Section 3",Section(title: "Section 4",isOpened: false)
]
// get rid of extra table view cells
picsTableView.tableFooterView = UIView()
// customize button
addButton.layer.cornerRadius = 0.5 * addButton.bounds.size.width
addButton.clipsToBounds = true
addButton.backgroundColor = .red
addButton.tintColor = .white
addButton.setImage(#imageLiteral(resourceName: "plus-5-512"),for: .normal)
view.bringSubviewToFront(addButton)
fpc.addPanel(toParent: self) //added as last statement
}
和
func addPanel(toParent: UIViewController) {
toParent.addChild(self)
toParent.view.addSubview(self.view)
self.didMove(toParent: toParent)
toParent.view.bringSubviewToFront(self.view)
}