错误＆＃34;类型的值...没有成员＆＃34;在懒惰的财产关闭中调用自我

Question

为什么以下Swift3代码在Xcode 8中导致错误value of type (NSObject) -> () -> MyView has no member getSomeButton？

lazy var someButton = {
    return self.getSomeButton // ERROR
}()

private func getSomeButton() -> UIButton {
    return UIButton()
}

Answer 1

实际上，错误消息完全是误导性的，应该是can't infer closure return type。指定变量类型可以解决问题。希望这有助于某人。

lazy var someButton: UIButton = {
    return self.getSomeButton // OK
}()