ios - 通过 prepare for segue 传递数据时出错

Question

我正在使用我的 prepare for segue 方法传递变量 x。代码如下:

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if (segue.identifier == "Restartseg") {
        var x = 1
        let destinationVC = segue.destination as! GameViewController
        destinationVC.x = x
    }
    else if (segue.identifier == "Homeseg"){
        //pass more data
    }

}

但是在 destinationVC.x = x 这行有一个编译时错误说:

Value of type 'GameViewController' has no member 'x'

但是，在 class id 下的 Game view Controller 文件中，我声明了变量 x:

class GameViewController: UIViewController {
var x:Int!   }

Answer 1

改变这一行

let destinationVC = segue.destination as! GameViewController

进入

let destinationVC = segue.destinationViewController as! GameViewController

然后清理并构建项目。希望有用