arrays - Swift 2.0 数组初始化

Question

我有一个类 (NavBar)，其中有几个我想放在数组中的变量。我目前遇到此错误。

'Instance member buttonOne cannot be used on type NavBar'

抛出错误的代码如下。

// Buttons
var buttonOne: Button?
var buttonTwo: Button?
var buttonThree: Button?
var buttonFour: Button?
var buttonFive: Button?
var buttonsArray: [Button] = [buttonOne, buttonTwo, buttonThree, buttonFour, buttonFive]

Answer 1

好吧，错误说明了一切，您不能将实例变量添加到另一个实例变量(数组)中。您正在寻找的是这样的东西:

class navBar {

var buttonOne: Button?
var buttonTwo: Button?
var buttonThree: Button?
var buttonFour: Button?
var buttonFive: Button?

    var buttonsArray : [Button?] = []

    func addValues() {
        buttonOne = Button()
        buttonTwo = Button()
        buttonThree = Button()
        buttonFour = Button()
        buttonFive = Button()

        buttonsArray = [buttonOne, buttonTwo, buttonThree, buttonFour, buttonFive]
    }
}