ios - 如何通过定时器索引数组并绑定(bind)到 View ？

Question

我有一个标签/ TextView ，我想每 180 秒为数组中的下一个“字符串”更改一次。
我这里有一些数组，需要与 Timer 和标签/ TextView 一起使用。

我的问题是我需要做什么？

@IBOutlet var ThisLabel: UILabel!

var array = ["a", "b", "c"]
var timer = Timer()

func labelShows() {
    timer = Timer.scheduledTimer(timeInterval: 180, target: self, selector: #selector(MyViewController.action), userInfo: nil, repeats: true)
}

override func viewDidLoad() {
    super.viewDidLoad()
    //Something here?
}

func action() {
    //what in this action?
    loveLabel.text = "Something here"
}

Answer 1

请检查:

@IBOutlet weak var label: UILabel!

var array = ["a", "b", "c"]
var i = 0
var timer = Timer()

func labelShows() {
    timer = Timer.scheduledTimer(timeInterval: 180, target: self, selector: #selector(MyViewController.action), userInfo: nil, repeats: true)
}

override func viewDidLoad() {
    super.viewDidLoad()
    labelShows()
    action()
}

func action() {
    label.text = array[i]
    i = (i + 1) % array.count 
}