将元素追加到数组后，它应该显示更多元素 [英] After appending element to array it should show more elements

问题描述

这是之前和之后的样子.

我有一个ForEach循环，当我单击该卡时，它会向阵列添加一个新元素，然后它应该显示2张卡.但是仍然有一张卡.(但我附加了新的卡片元素)那我该怎么办?

I have a ForEach Loop, and when I click on the card, it appends a new element to the array and then IT SHOULD SHOW 2 CARDS. But there is still one card. (but I appended the new card element) So what should I do?

struct TimelineFromUserView: View {
    
    var card: [Card] = cardData
    
    var body: some View {
        
        VStack {
            HStack {
                Text("History").bold()
                    .font(.largeTitle)
                    .padding(.top, 20)
                    .padding(.leading, 20)
                Spacer()
                
            }
            Divider()
            ScrollView(.vertical, showsIndicators: false) {
                
                VStack(spacing: 30) {
                    ForEach(card) { item in
                        CardForTimeline(card: item)
                            .onTapGesture {
                                    print("juhuu")
                                    cardData.append(Card(number: 2, start: "01.10.2021", end: "20.10.2021", days: 19, success: false))
                                    print(cardData)
                            }
                        .padding()
                    }
                }
                .padding(.top, 10)
            }
        }
    }
}

struct Card: Identifiable{
    
    var id = UUID()
    var number: Int
    var start: String
    var end: String
    var days: Int
    var success: Bool
}

var cardData: [Card] = [
    Card(number: 1 ,start: "05.06.2020", end: "15.06.2020", days: 10, success: true)
]

推荐答案

您只能将数组 cardData 的副本 card 传递给 ForEach ，但如果我正确理解了您的代码段，则该代码段应该是原始数组 cardData .

You only pass a copy card of the array cardData into the ForEach but if I understand your code snippets correctly it should be the original array cardData.

如果这不是问题，则发布更多代码将很有帮助.

If that's not the problem it would be helpful to post more of your code.

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