ios - 使自定义 UITableView 单元格正确显示内容(非空白)
问题描述
我一直在制作一个 iOS 应用程序,它需要一个可滚动的屏幕/视图并有一个图像,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.
}
*/
}
我的情节提要看起来像这样(它是主情节提要中的另一个视图,用于带有自定义类的原型单元格),我正在努力弄清楚为什么我不断得到“maintenance_list.somethin_label!”的“在展开可选值时意外发现 nil”。 text = self.items_maintenance[indexPath.row]" 或这个(空白单元格)当我使用'?' 代替 '!'。
我知道为什么在使用“?”时展开错误时我没有得到 nil。但真正的问题是为什么我无法与每个单元格中的视图进行交互以显示所需的数据。我检查了所有的网点,它们都是正确的。
任何帮助将不胜感激。
提前致谢。
解决方案
如果无法访问整个项目,很难说它为什么不起作用。
但是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为每个部分返回 2 个部分和 10 行部分。
您需要一个节标题,它有一个图像视图,然后只有一个原型单元格,您可以将其重复用于任何行。
希望这可以帮助。
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