从 UILabel Swift 中获取 Int [英] Get an Int out of an UILabel Swift

问题描述

我有一个问题，有大量按钮以数字作为标签，所以我认为我可以将标签作为整数而不是为每个按钮创建一个动作?！

I have the problem, to have a high amount of buttons which have a number as their label, so i thought i could take the label as an integer instead of creating an action for every button?!

@IBAction func NumberInput(sender: UIButton) {
    var input:Int = sender.titleLabel as Int
}

推荐答案

如果你想这样做，你可以使用 将 string 转换为 Int>string.toInt() 如:

If you want to do this, you can convert the string to an Int by using string.toInt() such as:

if let input = sender.titleLabel?.text?.toInt() {
    // do something with input
} else {
    // The label couldn't be parsed into an int
}

但是，我建议使用 UIView.tag 或子类化 UIButton 并向其添加 Int 属性来完成此操作，在以防您更改标签的显示.

However, I'd suggest either using UIView.tag or subclassing UIButton and adding an Int property to it to accomplish this, in case you ever change the display of your labels.

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