ios - 无法将类型 'NSRange'(又名 '_NSRange')的值转换为预期类型 'Range<Index>'(又名 'Range<String.CharacterView.Index>')

Question

检查字符串字符的范围时出现此错误...

@objc func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
    let shouldChange = false
    let text = textField.text
    var newString = text!.stringByReplacingCharactersInRange(range, withString: string) as? NSString
    if newString.length > 14{
        newString = newString.substringToIndex(14)
    }
    textField.text = newString.uppercaseString

    return shouldChange
}

Answer 1

而不是 text! 说 (text! as NSString)。

var newString = (text! as NSString).stringByReplacingCharactersInRange(range, withString: string) as? NSString