Question

swift - 限制同一VC中两个不同文本字段的文本字符

我想让一个文本字段只允许有人输入10个字符，而在第二个文本字段中他们可以输入20个字符而不知道如何将其放入一个应该更改字符func中，因为我猜你不做两个单独的功能，因为这对我不起作用？

//文字字段1

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {

    let currentCharacterCount = textfield1.text?.characters.count ?? 0

if (range.length + range.location > currentCharacterCount){
    return false

}
let newLength = currentCharacterCount + string.characters.count - range.length


return newLength <= 10

}

// text field 2

func textField2(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {

    let currentCharacterCount2 = TextField2.text?.characters.count ?? 0

    if (range.length + range.location > currentCharacterCount2){
        return false

    }
    let newLength = currentCharacterCount2 + string.characters.count - range.length


    return newLength <= 20

}

Answer 1

如果视图中的两个文本字段都有插座，那么您可以执行以下操作：

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {

    let currentCharacterCount = textField.text?.characters.count ?? 0

    if (range.length + range.location > currentCharacterCount){
        return false

    }
    let newLength = currentCharacterCount + string.characters.count - range.length

    var maxLength = 0
    if textField.isEqual(textField1) {
        maxLength = 10
    } else if textField.isEqual(textField2) {
        maxLength = 20
    }

    return newLength <= maxLength

}

只需将两个文本字段名称替换为您的出口名称：）

swift - 限制同一VC中两个不同文本字段的文本字符

1 个答案: