Question

我正在使用present打开视图控制器。

self.storyboard = UIStoryboard(name: "myStoryboard", bundle: nil)
self.myView = self.storyboard?.instantiateInitialViewController() as? myViewController
self.present(self.myView!, animated: true) { _ in }

然后在视图控制器中我试图从初始化器

获取数据

class myViewController: UIViewController {

    var dataA: String?
    var dataB: String?

    override init(dataA: String, dataB: String) {
        self.dataA = dataA
        self.dataB = dataB
        super.init(nibName: nil, bundle: nil)
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }
}

我收到错误Initializer does not override a designated initializer from its superclass

在这种情况下，如何覆盖init并传递数据？

Answer 1

除了不使用故事板之外，我认为没有办法。甚至Swinject也在一个单独的方法中做到这一点。

class myViewController: UIViewController {

    var dataA: String?
    var dataB: String?

    fun initialize(dataA: String, dataB: String) {
        self.dataA = dataA
        self.dataB = dataB
    }
}

并在另一个班级

self.storyboard = UIStoryboard(name: "myStoryboard", bundle: nil)
self.myView = self.storyboard?.instantiateInitialViewController() as? myViewController
self.myView.initialize(dataA: dataA, dataB: dataB)
self.present(self.myView!, animated: true) { _ in }

或者你可以用其他方式来创建一个静态函数，它将返回一个实例。但我更喜欢第一种方式。

class myViewController: UIViewController {

    var dataA: String?
    var dataB: String?

    static func instance(dataA: String, dataB: String) -> myViewController {
        //You could pass storyboard too
        let storyboard = UIStoryboard(name: "myStoryboard", bundle: nil)

        let myView = storyboard.instantiateInitialViewController() as? myViewController
        self.dataB = dataB
        self.dataA = dataA

        return myView
    }
}

如何使用自定义数据初始化视图控制器？

1 个答案: