在我的故事板中,我有一个View Controller,我还有一个导航控制器和另一个名为HistoryController的View Controller.导航控制器和HistroyController有一个关系“根视图控制器”
我的第一个视图控制器上有一个按钮,该按钮有一个推送到导航控制器的按钮.
我在第一个视图控制器中有这个代码来准备segue：
override func prepare(for segue: UIStoryboardSegue,sender: Any?) {
if let viewController = segue.destination as? HistoryController {
viewController.detailItem = barcodeInt as AnyObject
}
}
我的问题是当我运行我的代码并按下我的第一个控制器中的按钮时,我收到此错误：
Could not find a navigation controller for segue 'HistorySegue'. Push segues can only be used when the source controller is managed by an instance of UINavigationController.'
我尝试了以下内容
override func prepare(for segue: UIStoryboardSegue,sender: Any?) {
if let navVC = segue.destinationViewController as? UINavigationController{
if let historyVC = navVC.viewControllers[0] as? HistoryController{
historyVC.detailItem = barcodeInt as AnyObject
}
}
}
我也试过了
override func prepare(for segue: UIStoryboardSegue,sender: Any?) {
if let nav = segue.destination as? UINavigationController {
if let vc = nav.visibleViewController as? HistoryController {
vc.detailItem = barcodeInt as AnyObject
}
}
}
我仍然得到同样的错误：
Could not find a navigation controller for segue 'HistorySegue'. Push segues can only be used when the source controller is managed by an instance of UINavigationController.'
您需要将源视图控制器嵌入到导航控制器中,或将segue类型从推送更改为其他内容.此外,尝试将目标控制器转换为UINavigationController以防止在初始控制器之后出现另一个错误(如果已修复)：
override func prepare(for segue: UIStoryboardSegue,sender: Any?) {
if let navVC = segue.destinationViewController as? UINavigationController{
if let historyVC = navVC.viewControllers[0] as? HistoryController{
historyVC.detailItem = barcodeInt as AnyObject
}
}
}
看看它是否适合你.
编辑：更新了上面的代码.
