如何快速删除字母 uitextfield text 之间的多余空格

如何解决如何快速删除字母 uitextfield text 之间的多余空格

我在 viewController 中有名为 txtCompanyName 的 uiTextfield。我想问一下如何防止用户在字母之间输入额外的空格

var companyName = txtCompanyName.text.replacingOccurrences(of: "\"",with: "",options: Nsstring.CompareOptions.literal,range:nil)

解决方法

您可以继承 UITextField 并避免前导空格以及双尾空格和单词之间的双空格，如下所示：

class SingleSpaceField: UITextField {
    override func willMove(toSuperview newSuperview: UIView?) {
        // adds a target to the textfield to monitor when the text changes
        addTarget(self,action: #selector(editingChanged),for: .editingChanged)
        // sets the keyboard type to alphabet
        keyboardType = .alphabet
        // set the text alignment to left
        textAlignment = .left
        // sends an editingChanged action to force the textfield to be updated on launch
        sendActions(for: .editingChanged)
    }
    @objc func editingChanged() {
        // this saves the caret position
        let selectedRange = selectedTextRange
        // this avoids leading spaces
        text = text!.replacingOccurrences(of: #"^\s"#,with: "",options: .regularExpression)
        // this avois double spaces anywhere in your field
        text = text!.replacingOccurrences(of: #"\s{2,}"#,with: " ",options: .regularExpression)
        // this restores the caret position
        selectedTextRange = selectedRange
    }
}

,

如果您希望在输入时忽略空格“”，您应该使用 UITextFieldDelegate 方法之一：

  func textField(_ textField: UITextField,shouldChangeCharactersIn range: NSRange,replacementString string: String) -> Bool {
    guard let text = textField.text else {
      return false
    }
    if text == " " {
      return false
    }
    return true
  }

希望你能明白这一点，这会有所帮助。