在 Swift 中的数组数组中寻找不同的 headers 的替代方法

Question

我有一个程序可以正常工作，只是我收到了一条关于需要更改的内容的注释。

这个程序包含一个数组数组。在应用程序中，每个部分都有不同的 header。 header 个名称位于一个名为“myTitles”的单独数组中。用户希望 headers 不使用任何覆盖方法。我该如何改变这个？我拥有它的方式是我做过的唯一方式。

有人告诉我； “标题 (headers) 应该是一个字符串。”

Array of Arrays代码（供参考）：

var emojis: [[Emoji]] = [
            
            [Emoji(symbol: "", name: "Grinning Face", description: "A typical smiley face.", usage: "happiness"),
            Emoji(symbol: "", name: "Confused Face", description: "A confused, puzzled face.", usage: "unsure what to think; displeasure"),
            Emoji(symbol: "", name: "Heart Eyes", description: "A smiley face with hearts for eyes.", usage: "love of something; attractive"),
            Emoji(symbol: "", name: "Police Officer", description: "A police officer wearing a blue cap with a gold badge. He is smiling, and eager to help.", usage: "person of authority")],
            
            
            [Emoji(symbol: "", name: "Turtle", description: "A cute turtle.", usage: "Something slow"),
            Emoji(symbol: "", name: "Elephant", description: "A gray elephant.", usage: "good memory")],
            
            
            [Emoji(symbol: "", name: "Spaghetti", description: "A plate of spaghetti.", usage: "spaghetti")],
             
             
            [Emoji(symbol: "", name: "Die", description: "A single die.", usage: "taking a risk, chance; game"),
            Emoji(symbol: "⛺️", name: "Tent", description: "A small tent.", usage: "camping"),
            Emoji(symbol: "", name: "Stack of Books", description: "Three colored books stacked on each other.", usage: "homework, studying"),
            Emoji(symbol: "", name: "Broken Heart", description: "A red, broken heart.", usage: "extreme sadness"),
            Emoji(symbol: "", name: "Snore", description: "Three blue \'z\'s.", usage: "tired, sleepiness"),
            Emoji(symbol: "", name: "Checkered Flag", description: "A black and white checkered flag.", usage: "completion")]
        ]

Header数组：

let myTitles: [String] = ["PEOPLE", "ANIMALS", "FOOD", "OTHER"]

问题代码（当前 header 覆盖方法）：

override func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
            let headerView = UIView.init(frame: CGRect.init(x: 0, y: 0, width: tableView.frame.width, height: 50))
            
            let label = UILabel()
            label.frame = CGRect.init(x: 5, y: 5, width: headerView.frame.width-10, height: headerView.frame.height-10)
            label.text = myTitles[section]
            label.font = .systemFont(ofSize: 14)
            label.textColor = .gray
            headerView.addSubview(label)
            
            return headerView
        }
        
    override func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
            return 40
        }

Answer 1

您需要使用可选的数据源方法 func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String?

并且只是 return 数组中的字符串，而不是将其形成视图。

（FWIW 我更喜欢你的方法！）

Answer 2

override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    return self.myTitles.count
}

在 Swift 中的数组数组中寻找不同的 headers 的替代方法

Seeking alternative ways to have different headers in an array of arrays in Swift

overriding

header

swift