不确定如何避免 Swift 开关的默认语句中的垃圾

Not sure how to avoid junk in default statement of Swift switch

Switch 语句在 Swift 中必须是详尽无遗的,因此我必须在默认语句中添加一些内容以使编译器满意。

private enum TextFieldType: Int {
    case street1 = 0
    case street2
    case street3
    case town
    case postcode
    case phone
    case email
}

@IBAction func textFieldEditingChanged(textField: UITextField, forEvent event: UIEvent) {
    switch textField.tag {
    case TextFieldType.street1.rawValue:
        self.model?.address1 = textField.text
    case TextFieldType.street2.rawValue:
        self.model?.address2 = textField.text
    case TextFieldType.street3.rawValue:
        self.model?.address3 = textField.text
    case TextFieldType.town.rawValue:
        self.model?.town = textField.text
    case TextFieldType.postcode.rawValue:
        self.model?.postcode = textField.text
    case TextFieldType.phone.rawValue:
        self.model?.primaryPhone = textField.text
    case TextFieldType.email.rawValue:
        self.model?.email = textField.text
    default:
        println("")
    }
}

在这种情况下(如上),您将如何处理默认语句?为了它而放置 println("") 是不正确的。

您应该使用 break 离开开关语句:

default:
    break