从视图控制器到视图控制器的通用函数传输

Question

如何在 func as? ViewController 中输入数据？

private func toVC<T>(_ id: String, vc: T.Type) {
    if let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: id) as? T {
        if let window = self.window, let rootVC = window.rootViewController {
            var currVC = rootVC
            let navVC = UINavigationController()
            while let presentVC = currVC.presentedViewController {
                currVC = presentVC
            }
            navVC.viewControllers = [vc]
            currVC.present(navVC, animated: true, completion: nil)
        }
    }
}

我在 navVC.viewControllers = [vc] 中收到错误 Cannot convert value of type 'T' to expected element type 'UIViewController'。

如何正确创建函数？

UPD

Answer 1

更改方法签名如下，指定类型 UIViewController、

的 T

private func toVC<T: UIViewController>(_ id: String, vc: T.Type) {

为特定控制器传递data，

private func toVC<T>(_ id: String, vc: T.Type, data: Any) {
    if let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: id) as? T {
        if let window = self.window, let rootVC = window.rootViewController {
            var currVC = rootVC
            let navVC = UINavigationController()
            while let presentVC = currVC.presentedViewController {
                currVC = presentVC
            }
            (vc as? MyViewController1)?.data = data
            (vc as? MyViewController2)?.data = data
            navVC.viewControllers = [vc]
            currVC.present(navVC, animated: true, completion: nil)
        }
    }
}

从视图控制器到视图控制器的通用函数传输

Generic func transfer from view controller to view controller

xcode

viewcontroller

ios

swift