开关中的多种类型案例

Question

我知道可以：

enum MyEnum {
    case label
    case view
    case textField
}

let type = TypeEnum.label

switch type {
    case .label, .textField: break //I want to this but with type.
    case .view: break
}

我想知道如何使用开关进行条件测试类型。

类似于：

switch view {
    case is UILabel, is UITextField: break
    case is UIView: break
}

已编辑：

我知道我做错了什么。

switch view {
    case is UILabel, 
         is UITextField,
         is UILabel: break //It was telling me that this case would 
                           //never be executed. In my tests I forgot
                           //to remove the duplicate.
    case is UIView: break
}

无论如何谢谢 Rob，我不知道 fallthrough

Answer 1

您可以使用 fallthrough:

switch view {
    case is UILabel:     fallthrough
    case is UITextField: print("is label or text field")
    default:             print("is something else")
}