我想将数据传递给嵌入在 navigationController 中的第一个 viewController。
要访问这个导航 Controller ，它有一个 storyBoardID，我到达实例化 navigationController 但我不能向他传递数据，
这是我的代码:
extension UINavigationController {
func dismissAndPresentNavigationController(from storyboard: UIStoryboard?, identifier: String) {
guard let navigationController = storyboard?.instantiateViewController(withIdentifier: identifier) as? UINavigationController else { return }
print("OK")
if let nav = navigationController.navigationController?.viewControllers.first as? ChatBotViewController{
print("OK2")
}
self.dismiss(animated: false, completion: nil)
self.present(navigationController, animated: true, completion: nil)
}
我在参数中输入的标识符是导航 Controller 的storyBoardID。
如何向navigationcontroller的第一个 Controller 传输数据？
解决方案:
extension UINavigationController {
func dismissAndPresentNavigationController(from storyboard: UIStoryboard?, identifier: String, with fittoBottle: FittoBottle) {
guard let navigationController = storyboard?.instantiateViewController(withIdentifier: identifier) as? UINavigationController else { return }
if let nav = navigationController.viewControllers.first as? ChatBotViewController{
nav.fittoBottle = fittoBottle
}
self.dismiss(animated: false, completion: nil)
self.present(navigationController, animated: true, completion: nil)
}
最佳答案
从 Storyboard实例化导航 Controller 后，您将能够通过 navigationController.viewControllers.first 访问 Root View Controller 。
guard let navigationController = storyboard?.instantiateViewController(withIdentifier: identifier) as? UINavigationController else { return }
if let chatBotViewController = navigationController.viewControllers.first as? ChatBotViewController {
chatBotViewController.fittoBottle = fittoBottle
}
self.dismiss(animated: false, completion: nil)
self.present(navigationController, animated: true, completion: nil)
关于Swift:将数据传递给 NavigationController 的第一个子节点，使用 storyboardID 实例化，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53169595/