UITableView：制作单独的部分并添加标题和副标题

Posted 2023-02-23

【中文标题】UITableView：制作单独的部分并添加标题和副标题

【英文标题】：UITable View: Making separate sections and adding titles and subtitles

【发布时间】：2017-01-02 12:10:54

【问题描述】：

每个标题的单独部分； 在每个部分的标题下应该是副标题，副标题应该是药物。

我能够正确获取numberOfSections，如何设置正确的部分标题并为该项目调用标题和副标题？

class FinalPageViewController: UITableViewController 

var top: [String: AnyObject]!
var subheading: [String: AnyObject]!
var drugs:[String: AnyObject]!
let CellIdentifier = "Cell Identifier"
var sectioHeader = [String] ()


var subheads: [AnyObject] 
    //Passing the key Top(Array) here and defining it from plist
    if let subheads = top["Subhead"] as? [AnyObject] 
        return subheads
     else 
        return [AnyObject]()
    

var drug: [AnyObject] 
    //Passing the key Top(Array) here and defining it from plist
    if let drug = top["Drugs"] as? [AnyObject] 
        return drug
     else 
        return [AnyObject]()
    

var heads: [AnyObject] 
    //Passing the key Top(Array) here and defining it from plist
    if let heads = top["Head"] as? [AnyObject] 
        return heads
     else 
        return [AnyObject]()
    

override func viewDidLoad() 
    super.viewDidLoad()
    //Assigning the key Top here to title
    if let name = top["Top"] as? String 
        title = name

    
    tableView.register(UITableViewCell.classForCoder(), forCellReuseIdentifier: CellIdentifier)




override func didReceiveMemoryWarning() 
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.


override func numberOfSections(in tableView: UITableView) -> Int 
    return heads.count


override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int 

    return subheads.count


override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? 
    let titleName = title
if let titleHeader = heads as? [String: AnyObject], let titled = titleHeader["Headings"] as? String

    titleName.text = titled

return titleName


override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell 
    // Dequeue Resuable Cell
    let cell = tableView.dequeueReusableCell(withIdentifier: CellIdentifier, for: indexPath)

    if let head = heads[(indexPath as NSIndexPath).row] as? [String: AnyObject], let title = head["Headings"] as? String 
        //Topics is the Key inside array top
        // Configure Cell
        cell.textLabel?.text = title
    

    return cell;

plist 文件有点大，是这样的。

<plist version="1.0">
<array>
<dict>
    <key>Chap</key>
    <string>ANS</string>
    <key>Top</key>
    <array>
        <dict>
            <key>Topics</key>
            <string>Cholinergics</string>
            <key>Head</key>
            <array>
                <dict>
                    <key>Headings</key>
                    <string>Directly acting</string>
                    <key>Subhead</key>
                    <array>
                        <dict>
                            <key>Subheadings</key>
                            <string>Choline esters </string>
                            <key>Drugs</key>
                            <array>
                                <string>Acetylcholine</string>
                                <string>Bethanechol</string>
                                <string>Carbhachol</string>
                                <string>Methacholine</string>
                            </array>
                        </dict>
                        <dict>
                            <key>Subheadings</key>
                            <string>Natural Alkaloids</string>
                            <key>Drugs</key>
                            <array>
                                <string>Nicotine</string>
                                <string>Pilocarpine</string>
                                <string>Muscarine</string>
                                <string>Arecoline</string>
                            </array>
                        </dict>
                    </array>
                </dict>
                <dict>
                    <key>Headings</key>
                    <string>Indirectly acting</string>
                    <key>Subhead</key>
                    <array>
                        <dict>
                            <key>Subheadings</key>
                            <string>Reversible Carbamates</string>
                            <key>Drugs</key>
                            <array>
                                <string>Neostigmine</string>
                                <string>Edrophonium</string>
                                <string>Physostigmine</string>
                                <string>Pyridostigmine</string>
                                <string>Ambenonium</string>
                                <string>Galantamine</string>
                                <string>Donepezil</string>
                                <string>Rivastigmine</string>
                            </array>
                        </dict>
                        <dict>
                            <key>Subheadings</key>
                            <string>Reversible Acridine</string>
                            <key>Drugs</key>
                            <array>
                                <string>Tacrine</string>
                            </array>
                        </dict>
                        <dict>
                            <key>Subheadings</key>
                            <string>Irreversible Carbamates</string>
                            <key>Drugs</key>
                            <array>
                                <string>Propoxur</string>
                            </array>
                        </dict>
                        <dict>
                            <key>Subheadings</key>
                            <string>Irreversible organophosphates</string>
                            <key>Drugs</key>
                            <array>
                                <string>Echothiophate</string>
                                <string>Parathion</string>
                                <string>Malathion</string>
                                <string>Dyflos</string>
                                <string>Diazinon</string>
                                <string>Tabun</string>
                                <string>Sarin</string>
                                <string>Soman</string>
                            </array>
                        </dict>
                    </array>
                </dict>
                <dict>
                    <key>Headings</key>
                    <string>Cholineesterase Reactivators</string>
                    <key>Drugs</key>
                    <array>
                        <string>Pralidoxime</string>
                        <string>Obidoxime</string>
                        <string>Trimedoxime</string>
                    </array>
                </dict>
            </array>
            </dict>
            <dict>

【问题讨论】：

你有heads.count 作为你的numberOfSections 和numberOfRowsInSection 为什么？

哦！！！ numberOfRowsInSection 应该是 subheadings.count @Matt

您的代码中存在太多问题。你编译成功了吗？

是的，如果我删除 titleForHeaderInSection 函数...我可以完美运行代码

@Matt 无法获取“标题”键作为 SectionTitle 的字符串

【参考方案1】：

您的变量heads 是一个数组。所以你应该从heads数组中获取索引为section的元素，然后从titleHeader中获取“标题”。

试试这个

override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? 
        var titleName = title
        if let titleHeader = heads[section] as? [String: AnyObject], let titled = titleHeader["Headings"] as? String
        
            titleName = titled
        
        return titleName
    

【讨论】：

如何设置每个部分的标题和副标题为副标题和药物？