我有一个项目,我在其中放置一个视图,隐藏视图的按钮,一个显示视图,然后显示一个标签和一个按钮(每次按下按钮时,都会获得一个数字不同于0)
@IBAction weak var myView: UIView!
@IBAction Weak var myLabel: UILabel!
var numbers: [Int] = [1, 7, 9, 6, 0, 3, 10, 45, 2, 83].shuffled()
override func viewDidLoad() {
super.viewDidLoad()
myView.isHidden = true
myLabel.text = "(UserDefaults.standard.integer(forKey: "Key"))"
}
@IBAction func closeView(_ sender: Any) {
myView.isHidden = true
myLabel.text = 0
UserDefaults.standard.removeObject(forKey: "Key")
}
@IBAction func showView(_ sender: Any) {
myView.isHidden = false
}
@IBAction func addNumber(_ sender: Any) {
let oneNum = numbers.shuffled().first
UserDefaults.standard.set(oneNum, forKey: "Key")
myLabel.text = "(UserDefaults.standard.integer(forKey: "Key"))"
}
我想要的是添加一个函数,如果标签显示与0的数字,则可以自动显示myview。我该怎么做?
我认为您想要的就是这样:
@IBOutlet weak var myView: UIView!
@IBOutlet weak var myLabel: UILabel!
var numbers: [Int] = [1, 7, 9, 6, 0, 3, 10, 45, 2, 83].shuffled()
var currentNumber: Int {
didSet {
UserDefaults.standard.set(currentNumber, forKey: "currentNumberKey")
myLabel.text = "(currentNumber)"
// Hide if number is 0, else show
myView.isHidden = currentNumber == 0
}
}
private func setNextNumber() {
currentNumber = numbers.shuffled().first!
}
override func viewDidLoad() {
super.viewDidLoad()
currentNumber = UserDefaults.standard.integer(forKey: "currentNumberKey")
}
@IBAction func closeView(_ sender: Any) {
currentNumber = 0
}
@IBAction func showView(_ sender: Any) {
myView.isHidden = false
}
@IBAction func addNumber(_ sender: Any) {
setNextNumber()
}
设置变量 CurrentNumber 将自动更新标签文本,并自动隐藏myView(如果CurrentNumber为零)或显示myview(如果CurrentNumber为非零)。
viewDidload 还原状态。如果UiviewController消失并出现,则该状态将自动维护,因此 viewWillAppear中无需任何内容strong> viewWillDisappear / viewDiddIsAppear 。