ios - 将类型作为变量传递

Question

如何在 Swift 4 中将类型作为变量传递？

let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "MapViewController") as! MapViewController

我在一个可怕的 if 语句中有与上面类似的内容，我想转移到一个函数，但不确定如何传递“MapViewController”(或任何 Controller 作为变量)。

'“伪”代码'

function setVC(withViewController : Any) {
    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let vc = storyboard.instantiateViewController(withIdentifier: "MapViewController") as! withViewController
}

Answer 1

您可以使用如下通用参数:

function setVC<T>(withViewController: T) {
    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let vc = storyboard.instantiateViewController(withIdentifier: "MapViewController") as! T
}