Question

我需要使用类别的名称填充我的tableview。当我填充tableview时，它显示了这个......

Category(name: "Sandwiches & Burgers", items: [])

我追加所有信息的地方......

 let sortedKeys = newArray.sorted{$0.0 < $1.0}
    let shake = Item(name: "Shake", carbs: 20)
    let fries = Item(name: "Fries", carbs: 30)

    let beverages = Category(name: "Beverages", items: [shake])
    let chips_fries = Category(name: "Chips & Fries", items: [fries])
    let desserts = Category(name: "Desserts", items: [])
    let other = Category(name: "Other Menu Items", items: [])
    let sandwiches_burgers = Category(name: "Sandwiches & Burgers", items: [])
    let sides = Category(name: "Sides", items: [])

    a_w = Restaurant(name: "A&W", categories: [beverages, chips_fries, desserts, other, sandwiches_burgers, sides])

    menuArray = [a_w]

然后我的班级

struct Item {
let name: String
let carbs: Int
}
struct Category {
    let name: String
    let items: [Item]
}

struct Restaurant {
    let name: String
    let categories: [Category]

}

这是我填充的地方......

var currentRestaurant:Restaurant!
var menuArray:[Restaurant] = []


override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    var array = currentRestaurant.categories
    print(array)
    let currentCell = tableView.dequeueReusableCell(withIdentifier: "cell")!
    currentCell.textLabel?.text = String(describing: array[indexPath.item])
    return currentCell
}

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

    return currentRestaurant.categories.count
}

Answer 1

查看您的数据源cellForRowAt应该是：

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
    let category = currentRestaurant.categories[indexPath.row]
    cell.textLabel!.text = category.name
    return cell
}

但是在重新加载表格视图之前的某个时刻，您必须将currentRestaurant设置为menuArray[0]

实际上处理这种数据源的常用方法是在各个部分显示餐馆。

请将数据源数组声明为比menuArray

更具描述性的名称

var restaurants = [Restaurant]()

然后返回numberOfSections

中的餐馆数量

override func numberOfSections(in tableView: UITableView) -> Int {
    return restaurants.count
}

以及numberOfRowsInSection

中的类别数量

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

    let restaurant = restaurants[section]
    return restaurant.categories.count
}

和cellForRow是

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)

    let restaurant = restaurants[indexPath.section]
    let category = restaurant.categories[indexPath.row]
    cell.textLabel!.text = category.name
    return cell
}

通过这种方式，您根本不需要currentRestaurant。

在viewDidLoad填充数据源数组并重新加载表视图

override func viewDidLoad() {
    super.viewDidLoad()

    let shake = Item(name: "Shake", carbs: 20)
    let fries = Item(name: "Fries", carbs: 30)

    let beverages = Category(name: "Beverages", items: [shake])
    let chips_fries = Category(name: "Chips & Fries", items: [fries])
    let desserts = Category(name: "Desserts", items: [])
    let other = Category(name: "Other Menu Items", items: [])
    let sandwiches_burgers = Category(name: "Sandwiches & Burgers", items: [])
    let sides = Category(name: "Sides", items: [])

    restaurants = [Restaurant(name: "A&W", categories: [beverages, chips_fries, desserts, other, sandwiches_burgers, sides])]

    tableView.reloadData()
}

不能仅使用名称填充tableview

1 个答案: