我一直在致力于制作一个 iOS 应用程序，它需要一个可滚动的屏幕/ View ，并且有一个图像，然后是一个列表，然后是一个图像，然后是另一个图像(附件是我制作的 Android 版本的屏幕截图)
我尝试使用以下代码，它为我提供了正确数量的单元格，但它们都是空白的。
//
// ServicesTableViewController.swift
// Contact Australis
//
// Created by Raghav Khanna on 22/4/18.
// Copyright © 2018 Australis. All rights reserved.
//
import UIKit
class ServiceViewCell: UITableViewCell {
@IBOutlet weak var IMage: UIImageView!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
IMage.frame = CGRect(x: 0, y: 0, width: 100, height: 200)
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
}
class ServiceViewCellList: UITableViewCell {
@IBOutlet weak var somethin_label: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
let color = UIColor(red: 0/255, green: 105/255, blue: 191/255, alpha: 1.0).cgColor
let back_colour = UIColor(red: 212/255, green: 242/255, blue: 253/255, alpha: 1.0).cgColor
let back_colour_ui = UIColor(red: 212/255, green: 242/255, blue: 253/255, alpha: 1.0)
let radius: CGFloat = 5
let border_width:CGFloat = 1.5
somethin_label.layer.borderColor = color
somethin_label.layer.borderWidth = border_width
somethin_label.layer.cornerRadius = radius
somethin_label.backgroundColor = back_colour_ui
}
var items_maintenance = ["Painting","All Lighting & Globe Replacemt",
"Carpet & Hard Floor Replacement","Electrical Work & Maintenance","Plumbing Work & Maintenance","Test & Tag Completion","Office Furniture Removal", "Hard Waste Removal", "Window Frosting", "All Other Handy Man & Maintenance Tasks"]
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
} class ServiceViewCellCleaning: UITableViewCell {
@IBOutlet weak var Title: UIImageView!
override func awakeFromNib() {
super.awakeFromNib()
Title.frame = CGRect(x: 0, y: 0, width: 100, height: 200)
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
}
class ServiceViewCellCleaningList: UITableViewCell {
@IBOutlet weak var other_label: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
let color = UIColor(red: 0/255, green: 105/255, blue: 191/255, alpha: 1.0).cgColor
let back_colour = UIColor(red: 212/255, green: 242/255, blue: 253/255, alpha: 1.0).cgColor
let back_colour_ui = UIColor(red: 212/255, green: 242/255, blue: 253/255, alpha: 1.0)
let radius: CGFloat = 5
let border_width:CGFloat = 1.5
other_label.layer.borderColor = color
other_label.layer.borderWidth = border_width
other_label.layer.cornerRadius = radius
other_label.backgroundColor = back_colour_ui
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
}
class ServicesTableViewController: UITableViewController {
let basicCellIdentifier = "BasicCell"
var items_maintenance = ["Painting","All Lighting & Globe Replacement", "Carpet & Hard Floor Replacement","Electrical Work & Maintenance","Plumbing Work & Maintenance","Test & Tag Completion","Office Furniture Removal", "Hard Waste Removal", "Window Frosting", "All Other Handy Man & Maintenance Tasks"]
var items_cleaning = ["All Genral Comercial Cleaning","Office Cleaning", "Initial Clean","Spring Clean","Steam Carpet Cleaning","Window Washing","High Pressure Washing", "Waste Removal", "Strip & Seal Hard Floors", "Scrubbing & Buffing Hard Floors"]
let cellSpacingHeight: CGFloat = 5
@IBOutlet var table: UITableView!
func configureTableView() {
//tableView.rowHeight = UITableViewAutomaticDimension
//tableView.estimatedRowHeight = 1000.0
//let rect = CGRect(origin: .zero, size: CGSize(width: 400, height: 400))
//self.tableView = UITableView(frame: rect, style: UITableViewStyle.plain)
table.register(ServiceViewCell.self, forCellReuseIdentifier: "maintenance")
table.register(ServiceViewCellList.self, forCellReuseIdentifier: "customcell")
table.register(ServiceViewCellCleaning.self, forCellReuseIdentifier: "cleaning")
table.register(ServiceViewCellCleaningList.self, forCellReuseIdentifier: "cleaning_customcell")
}
/*func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return
}*/
override func viewDidLoad() {
super.viewDidLoad()
self.configureTableView()
table.reloadData()
table.delegate = self
table.dataSource = self
// Uncomment the following line to preserve selection between presentations
self.clearsSelectionOnViewWillAppear = false
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 4
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if section == 0 {
return 1
} else if section == 1 {
return items_maintenance.count
} else if section == 2 {
return 1
}
else {
return items_cleaning.count
}
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let maintenance_title = table.dequeueReusableCell(withIdentifier: "maintenance", for: indexPath) as! ServiceViewCell
let maintenance_list = table.dequeueReusableCell(withIdentifier: "customcell", for: indexPath) as! ServiceViewCellList
let cleaning_title = table.dequeueReusableCell(withIdentifier: "cleaning", for: indexPath) as! ServiceViewCellCleaning
let cleaning_list = table.dequeueReusableCell(withIdentifier: "cleaning_customcell", for: indexPath) as! ServiceViewCellCleaningList
maintenance_list.somethin_label?.text = self.items_maintenance[indexPath.row]
maintenance_list.somethin_label?.adjustsFontSizeToFitWidth = false
maintenance_list.somethin_label?.font = UIFont.systemFont(ofSize: 10.0)
cleaning_list.other_label?.text = "test"
cleaning_list.other_label?.adjustsFontSizeToFitWidth = false
cleaning_list.other_label?.font = UIFont.systemFont(ofSize: 10.0)
cleaning_title.Title?.image = UIImage(named: "cleaning.png")
maintenance_title.IMage?.image = UIImage(named: "maintenance.png")
if indexPath.section == 0 {
return maintenance_title
} else if indexPath.section == 1 {
return maintenance_list
} else if indexPath.section == 2 {
return cleaning_title
}
else {
return cleaning_list
}
return cleaning_list
}
/*
// Override to support conditional editing of the table view.
override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
// Return false if you do not want the specified item to be editable.
return true
}
*/
/*
// Override to support editing the table view.
override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
// Delete the row from the data source
tableView.deleteRows(at: [indexPath], with: .fade)
} else if editingStyle == .insert {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
*/
/*
// Override to support rearranging the table view.
override func tableView(_ tableView: UITableView, moveRowAt fromIndexPath: IndexPath, to: IndexPath) {
}
*/
//Override to support conditional rearranging of the table view.
override func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
// Return false if you do not want the item to be re-orderable.
return false
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
My Storyboard looks like this (它是主 Storyboard中带有自定义类的原型(prototype)单元的另一个 View )，我正在努力弄清楚为什么我总是得到“maintenance_list.somethin_label!.text = self.items_maintenance”的“在展开可选值时意外发现nil” [indexPath.row]"或 this (blank cells) 当我使用“？”时代替 '!'。
我知道为什么在使用“？”时解包时没有得到 nil 错误。但真正的问题是为什么我无法与每个单元格中的 View 进行交互以显示所需的数据。我检查了所有的网点，都是正确的。
任何帮助将不胜感激。
提前致谢。
最佳答案
如果无法访问整个项目，很难说它为什么不起作用。
但我认为您遵循的方法不正确，您应该考虑只有两个部分(维护、清洁)，然后维护和清洁的每个项目都是一个单元格，因此您的数据源应该返回 2 个部分和 10每个部分的行。
您需要一个节标题，其中包含一个 ImageView ，然后只有一个原型(prototype)单元格，您可以将其重复用于任何行。
希望这有帮助。
关于ios - 使自定义 UITableView 单元格正确显示内容(非空白)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/50106100/