Swift字符数

Question

我是xcode新手，需要在UILabel中找到字符串的字符数

@IBAction func buttonPressed(_ sender: Any) {
            curr_channel.text = ""
            let tag = (sender as! UIButton).tag
            if((curr_channel.text?.character.count())! < 2){
                 curr_channel.text = curr_channel.text! + String(tag)
            }
        }

Answer 1

我想这就是你需要的：

@IBAction func buttonPressed(_ sender: Any) {
    let tag = (sender as! UIButton).tag
    if let text = curr_channel.text, text.count < 2 {
        curr_channel.text = "\(text) \(tag)"
    }
}

Answer 2

下面是如何在UILable中打印/获取字符数的方法。

@IBOutlet weak var myLabel: UILabel!
@IBAction func buttonPressed(_ sender: Any) {
  let countOfCharsInLabel = myLabel.text?.count
  print("\(countOfCharsInLabel)")
}