swift - 从随机排列的数组中设置按钮的标题 - Swift

Question

这是我的代码

    func shuffle() {
    let footballClubsInPoland = GKRandomSource.sharedRandom().arrayByShufflingObjects(in: self.footballClubsInPoland)
    option1.setTitle((footballClubsInPoland[0] as AnyObject).name, for: .normal)
    option2.setTitle((footballClubsInPoland[1] as AnyObject).name, for: .normal)
    print(footballClubsInPoland[0])
    print(footballClubsInPoland[1])
}

我的问题是，我可以在控制台中看到已打乱顺序的对象，但按钮的标题未在模拟器中加载。我该怎么办？

Answer 1

在执行 (footballClubsInPoland[0] as AnyObject 时，您将元素转换为 AnyObject，而在调用 .name 时，您实际上并未引用 footballClubs 的 name 属性。

所以你应该这样做:

func shuffle() {
    let footballClubsInPoland = GKRandomSource.sharedRandom().arrayByShufflingObjects(in: self.footballClubsInPoland) as! [footballClubs]
    option1.setTitle(footballClubsInPoland[0].name, for: .normal)
    option2.setTitle(footballClubsInPoland[1].name, for: .normal)
    print(footballClubsInPoland[0])
    print(footballClubsInPoland[1])