在UITextView

Question

textview写道：“你今天已经冥想了0次。”我通过IBOutlet连接了它。

代码完成后是否可以仅增加“0”，并更新文本？

Answer 1

您应该使用变量来存储数字：

var timesMeditated = 0 {
    didSet {
        yourTextView.text = "You have meditated \(timesMeditated) times today"
    }
}

请注意我是如何编写didSet属性观察者的。当变量发生变化时会调用它，所以每当你这样做时：

timesMeditated += 1

您的文字视图也会更新。

Answer 2

您可以使用新文本再次设置整个文本

喜欢

yourTextView.text =  "You have meditated \(counter) times today."

counter是您的变量，其中包含计数

Answer 3

试试这个

self.textView.text = "You have meditated \(counter) times today."

Answer 4

最佳方法，更新计数器中的textView didSet ：

var mediatationOfDay = 0 {
    didSet {
        myTextView.text = "You have meditated \(mediatationOfDay) times today."
    }
}

要回答您的初步问题，这是可能的，但我不建议：

var mediatationOfDay = 0
var textValue = "You have meditated 0 times today."

private func incrementMedidationOfTheDay() {
    let oldvalue = mediatationOfDay
    mediatationOfDay += 1
    textValue = textValue.replacingOccurrences(of: oldvalue.description, with: mediatationOfDay.description)
}

也可能：

private func incrementMedidationOfTheDay() {
    mediatationOfDay += 1
    myTextView.text = "You have meditated \(mediatationOfDay) times today."
}

Answer 5

您可以通过编程方式设置

@IBOutlet weak var yourTxtView: UITextView!
yourTxtView.text = "You have meditated \(count) times today."