Ios Swift 4：将数据从Tableview传递到ViewController

所以我在这上面花了两天的时间，我可以肯定地说我被卡住了

因此，我创建了一个链接到自定义单元格的tableview，我已经设置了一个项目数组，并且在构建它时每个部分都按正确的顺序排列，这一切都很好，但我似乎无法传递信息！哈哈。我总是出错！我将尽可能地详细说明我是新来的（并且是一名3周大的程序员#初学者），不确定我可以附加多少信息，但这里什么都没有：

以下是我的数组和表函数：

var foodKind = [["Whole eggs", "Bacon", "16oz water"],["80% Ground beef", "Avacado", "16oz water"],["Lettuce burger", "Avacado Salad", "16oz water"],["Tri-pep"],["MTS Machine Whey", "Tri-Pep"]]
var itemCount =  [["4 boiled", "3 Slice", "1 bottle"],["6oz", "1 whole", "1 bottle"],["1 burger", "2 cups", "1 bottle"], ["1 serving"], ["1 scoop", "1 serving"]]

var count = [3, 3, 3, 1, 2]

var foodImage = [[#imageLiteral(resourceName: "hard boiled eggs"), #imageLiteral(resourceName: "bacon"),#imageLiteral(resourceName: "water")], [#imageLiteral(resourceName: "ground beef"), #imageLiteral(resourceName: "avacdo"), #imageLiteral(resourceName: "water")],[ #imageLiteral(resourceName: "lettuce wrap burger"), #imageLiteral(resourceName: "avacado salad 1"), #imageLiteral(resourceName: "water")], [#imageLiteral(resourceName: "tri-pep aminos")], [#imageLiteral(resourceName: "mtswhey-2"), #imageLiteral(resourceName: "tri-pep aminos")]]

var sections = ["Breakfast: 450 calories", "Lunch: 650 calories", "Dinner: 543 calories","Pre-Workout calories: 0", "PostWorkout: 153 calories"]
var selectedIndex = Int()

    override func viewDidLoad() {
    super.viewDidLoad()

    dietTableView.delegate = self
   //dietTableView.dataSource = self

        self.dietTableView.register(UINib(nibName: "customCell", bundle: nil), forCellReuseIdentifier: "custom")

}

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

func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
    return sections[section]

}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return count[section]


}
func numberOfSections(in tableView: UITableView) -> Int {
   return 5
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    let cell : CustomTableViewCell = self.dietTableView.dequeueReusableCell(withIdentifier: "custom") as! CustomTableViewCell


    cell.itemName.text = foodKind[indexPath.section][indexPath.row]
    cell.itemCount.text = itemCount[indexPath.section][indexPath.row]
    cell.itemPicture.image = foodImage[indexPath.section][indexPath.row]
return cell

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    self.selectedIndex = indexPath.row
    performSegue(withIdentifier: "Item", sender: self)
}


override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "Item" {
        let vc : ItemViewController = segue.destination as! ItemViewController



        vc.count = itemCount[selectedIndex]
        vc.image = foodImage[selectedIndex]
        vc.name = foodKind[selectedIndex]

以下是我的“didselectrow”和“preparesegue”功能：

var foodKind = [["Whole eggs", "Bacon", "16oz water"],["80% Ground beef", "Avacado", "16oz water"],["Lettuce burger", "Avacado Salad", "16oz water"],["Tri-pep"],["MTS Machine Whey", "Tri-Pep"]]
var itemCount =  [["4 boiled", "3 Slice", "1 bottle"],["6oz", "1 whole", "1 bottle"],["1 burger", "2 cups", "1 bottle"], ["1 serving"], ["1 scoop", "1 serving"]]

var count = [3, 3, 3, 1, 2]

var foodImage = [[#imageLiteral(resourceName: "hard boiled eggs"), #imageLiteral(resourceName: "bacon"),#imageLiteral(resourceName: "water")], [#imageLiteral(resourceName: "ground beef"), #imageLiteral(resourceName: "avacdo"), #imageLiteral(resourceName: "water")],[ #imageLiteral(resourceName: "lettuce wrap burger"), #imageLiteral(resourceName: "avacado salad 1"), #imageLiteral(resourceName: "water")], [#imageLiteral(resourceName: "tri-pep aminos")], [#imageLiteral(resourceName: "mtswhey-2"), #imageLiteral(resourceName: "tri-pep aminos")]]

var sections = ["Breakfast: 450 calories", "Lunch: 650 calories", "Dinner: 543 calories","Pre-Workout calories: 0", "PostWorkout: 153 calories"]
var selectedIndex = Int()

    override func viewDidLoad() {
    super.viewDidLoad()

    dietTableView.delegate = self
   //dietTableView.dataSource = self

        self.dietTableView.register(UINib(nibName: "customCell", bundle: nil), forCellReuseIdentifier: "custom")

}

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

func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
    return sections[section]

}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return count[section]


}
func numberOfSections(in tableView: UITableView) -> Int {
   return 5
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    let cell : CustomTableViewCell = self.dietTableView.dequeueReusableCell(withIdentifier: "custom") as! CustomTableViewCell


    cell.itemName.text = foodKind[indexPath.section][indexPath.row]
    cell.itemCount.text = itemCount[indexPath.section][indexPath.row]
    cell.itemPicture.image = foodImage[indexPath.section][indexPath.row]
return cell

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    self.selectedIndex = indexPath.row
    performSegue(withIdentifier: "Item", sender: self)
}


override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "Item" {
        let vc : ItemViewController = segue.destination as! ItemViewController



        vc.count = itemCount[selectedIndex]
        vc.image = foodImage[selectedIndex]
        vc.name = foodKind[selectedIndex]

这是ItemViewController变量：

var name : [String] = [""]   //this is the only way I can code it without getting an error.

var image = [UIImage]()   // lost here

var count : [String] = [""]   //this is the only way I can code it without getting an error.


override func viewDidLoad() {
    super.viewDidLoad()

    self.itemName.text = String(describing: name)

    self.itemImage.image = UIImage(named: image) //not working!!! Cant seem to find the right code for this from converting UIIMAGE to String. I am just lost!

    self.itemCount.text = String(describing: count)

下面是我得到的“Image”变量错误代码的屏幕截图：

当我忽略图像时（因为我无法计算代码），我构建了应用程序，我得到了以下结果：

---

您的问题似乎很简单：

var image = [UIImage]()   // lost here

这是一组图像

建议单个项目，您想要单个图像吗

var image:UIImage!

警告，如果使用时图像为零，将崩溃。（可选使用UIImage？但必须展开）

因此，在表视图控制器中

vc.image = foodImage[indexPath.section][indexPath.row]

将按预期进行操作。无需使用：

self.itemImage.image = UIImage(named: image) //not working!!! Cant seem to find the right code for this from converting UIIMAGE to String. I am just lost!

（这是不正确的，因为您正试图使用图像数组传递到从文件加载图像的字符串参数。）

只需使用：

self.itemImage.image = self.image

因为它们都是图像类型

在单元格中执行正确的操作，并在数组中为数组编制索引以获取图像，因此在此处执行相同的操作，并在局部视图控制器中使用单个图像类型。这样，如果单击beef，将发送beef的图像

作为一个旁白，考虑使用一个数据模型类型作为配方。

class Ingredient {
var name:String = ""
var image:UIImage! = nil
var count:Int = 0
var calories:Int = 0

public init(name: String, image: UIImage, count: Int, calories: Int) {
self.name = name
self.image = image
self.count = count
self.calories = calories
}
}

然后你可以说：

let ingredients = [Ingredient("Beef", beefImage, 100, 350), Ingredient("Onion", onionImage, 1, 20)]

---

或诸如此类，谢谢您抽出时间！我正在尝试使用一组图像，而不仅仅是一个图像…项目详细信息需要显示多个图像？或者你的意思是tableview有一组图像，但是item view只显示一个图像？如果你看我附加的tableview图片，我希望它显示我在itemviewcontroller中点击的表行的图片。修改了我的答案，最重要的问题：如果你点击牛肉，细节页面是否需要只显示牛肉？是的！我明白你的意思了！如果我点击牛肉，我希望它在图片上方有“绞牛肉”的名称，在图片下方有服务。这适用于我挑选的其他每一件物品。这有意义吗？Valerino错误很常见，您无法在image init中传递UIImage数组，预期参数是字符串值。因此，将图像名称作为字符串传递（例如-：“MyImage.png”）。执行类似于-：self.itemImage.image=UIImage（名称：image[0]）的操作，并从特定索引中获取字符串值，并使用包含图像名称或url的字符串数组代替UIImage数组。ex-：var image=[string]（）。现在，在这个数组中保存资产中的图像名称，或者从服务器获取数据时，解析JSON并获取字符串URL，然后追加到数组中。