For 循环 Swift 中的延迟 [英] Delay in For Loop Swift

问题描述

我正在 SwiftUI 中创建一个简单的纸牌游戏 (Set).我有一个按钮，点击时会发出 X 张新牌.目前，它使所有卡片一次显示.我想知道如何让它们一次一个出来.

I am creating a simple card game (Set) in SwiftUI. I have a button that will deal X new cards when tapped. Currently, it makes all cards show up at once. I was wondering how I could make them come out one at a time.

Deal 通过将一张新卡附加到模型中的 Deck 数组来工作.ContentView 在网格中显示每张卡片.

Deal works by appending a new card to a Deck array in the model. ContentView displays each card in the grid.

这是我目前在网上查找后所拥有的.显示第一张卡片，然后显示所有卡片

This is what I currently have after looking online. Displays first card then next all at once

func deal(_ numberOfCards: Int) {
        withAnimation(Animation.easeInOut(duration: 1)) {
            viewModel.deal()
        }
        for _ in 1..<numberOfCards {
            DispatchQueue.main.asyncAfter(deadline: .now() + 0.7) {
                withAnimation(.easeInOut) {
                    viewModel.deal()
                }
            }
        }
    }

推荐答案

试试这个

func deal(_ numberOfCards: Int) {
    withAnimation(Animation.easeInOut(duration: 1)) {
        viewModel.deal()
    }
    for i in 1..<numberOfCards {
        DispatchQueue.main.asyncAfter(deadline: .now() + Double(i) * 0.7) {
            withAnimation(.easeInOut) {
                viewModel.deal()
            }
        }
    }
}

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