线程 1: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0) Swift

Posted 2023-02-24

【中文标题】线程 1: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0) Swift

【英文标题】：Thread 1: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0) Swift

【发布时间】：2018-06-01 07:50:41

【问题描述】：

我正在尝试从一种视图切换到另一种视图，但出现此错误，我不知道为什么会出现此错误。

我用这个函数去下一个控制器：

   func showChatControllerForGroup(_ user: [User], groupName: String) 

        let vc: GroupChatMessangingViewController = self.storyboard?.instantiateViewController(withIdentifier: "GroupChatMessangingViewController") as! GroupChatMessangingViewController
//it crashed above here

        vc.group?.members = user
        vc.group?.name = groupName
        self.navigationController?.pushViewController(vc, animated: true)

要调用它，我在另一个视图中调用它：

var group: Group? 
    didSet 
        navigationItem.title = group?.name
    


var chosenUser: [User] = []
let user = self.chosenUser

  override func viewDidLoad() 
    super.viewDidLoad()

    navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Create", style: .plain, target: self, action: #selector(createGroup))

    // Do any additional setup after loading the view.


 @objc func createGroup()

    let transition = CATransition()
    transition.duration = 0.5
    transition.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
    transition.type = kCATransitionReveal
    transition.subtype = kCATransitionFromBottom
    navigationController?.view.layer.add(transition, forKey: nil)
    _ = navigationController?.popViewController(animated: true)
    let user = self.chosenUser
    self.nextVC.showChatControllerForGroup(user, groupName: groupNameTextField.text!) 

以防万一有人需要查看我的用户类：

class User 
var id: String?
var name: String?
var email: String?
var profileImageUrl: String?
var lastMessage: String?
var timestamp: String? //reason why this exist was because in mainmenu, we appended users, not msssage

init() 



init(dictionary: [String: AnyObject]) 
    self.id = dictionary["id"] as? String
    self.name = dictionary["name"] as? String
    self.email = dictionary["email"] as? String
    self.profileImageUrl = dictionary["profileImageUrl"] as? String

在我的小组课上：

class Group 
var id: String?
var name: String?
var members: [User]!
var groupImageUrl: String?
var lastMessage: String?
var timestamp: String?

init() 



init(dictionary: [String: AnyObject]) 
    self.id = dictionary["id"] as? String
    self.name = dictionary["name"] as? String

有什么原因导致它崩溃吗？

【问题讨论】：

在 Group 类上尝试从 var members 更改成员：[User]！到 var 成员：[User] = []

完成，仍然在同一个地方崩溃

好的，然后在 showChatControllerForGroup 上尝试使用它所拥有的故事板名称再次初始化故事板，而不是使用 self.storyboard 调用 GroupChatMessangingViewController？但有了新变量

【参考方案1】：

我猜你在

    let vc: GroupChatMessangingViewController = self.storyboard?.instantiateViewController(withIdentifier: "GroupChatMessangingViewController") as! GroupChatMessangingViewController

您调用了错误的故事板。检查并查看您是否在正确的情节提要中。

【讨论】：

好的，知道了！谢谢。我只是想知道我只有一个故事板，为什么不是自我。是正确的......但无论如何

添加了 let storyboard = UIStoryboard(name: "Main", bundle: nil)