在视图控制器之间共享异步调用的结果

你可以 RootVCDelegate 代理数组,然后在您想要对代理执行操作时 delegats.forEach { ..... } 在分配委托时,只需将委托附加到 delegates

例子:

// Delegate Protocol
protocol RootVCDelegate {
    fetch(results: [Objects]) //returning Void does nothing so no need to write it
}

// RootVC
class RootVC {
    delegates: [RootVCDelegate]

    prepare(for segue: UIStoryboardSegue) {
        let destination = (segue.destination as? UINavigationController).rootViewController ?? segue.destination  // how I like to handle things if there's a possibility of a UINavigationController housing my UIViewController
        switch destination {
        case _ as MapVC: delegates.append(destination)
        case _ as ListVC: delegates.append(destination)
        default: return
        }
    }
}

这可能就是你想要的?