你如何在 Swift 中呈现来自 Xib 的 VC？

Question

我正在尝试从 Xib 文件中呈现 VC，但结果是

Fatal error: Unexpectedly found nil while unwrapping an Optional value

@IBAction func viewCartBtnTapped(_ sender: Any) {

        let cart = storyboard?.instantiateViewController(withIdentifier: "CartVC") as? CartVC

        present(cart!, animated: true, completion: nil)

}

Answer 1

试试下面的代码，YourStoryBoradName 应该是不带“.storyboard”扩展名的故事板名称：

let storyBoard : UIStoryboard = UIStoryboard(name: "YourStoryBoradName", bundle:nil)
let viewController = storyBoard.instantiateViewController(withIdentifier: "CartVC")as! CartVC
self.present(viewController, animated: true, completion: nil)

你如何在 Swift 中呈现来自 Xib 的 VC？

How do you present a VC from Xib in Swift?

xib

segue

swift