ios - 无法将类型 'Range'(又名 'Range')的值转换为预期参数类型 'NSRange'(又名 '_NSRange')

Question

我正在尝试用属性字符串替换子字符串。以下是我的代码。

let searchText = self.searchBar.text!
let name = item.firstName ?? ""
let idNo = "Employee Id. \(item.employeeId ?? "NA")"

if let range = name.range(of: searchText, options: String.CompareOptions.caseInsensitive, range: nil, locale: nil)
{
    let attributedSubString = NSAttributedString.init(string: name.substring(with: range), attributes: [NSFontAttributeName : UIFont.boldSystemFont(ofSize: 17)])
    let normalNameString = NSMutableAttributedString.init(string: name)
    normalNameString.mutableString.replacingCharacters(in: range, with: attributedSubString)
    cell.name.attributedText = normalNameString
}
else
{
    cell.name.text = name
}

我遇到编译时错误:

"Cannot convert value of type 'Range' (aka 'Range') to expected argument type 'NSRange' (aka '_NSRange')".

我应该在这里更改什么？

Answer 1

您可以使用 NSString 和 NSRange，您还需要更改此行 normalNameString.mutableString.replacingCharacters(in: range, with: attributedSubString) 并改用这个 normalNameString.replaceCharacters(in: nsRange, with: attributedSubString) 因为 mutableString 是 NSMutableString，而 replacingCharacters 期望 String 和不是 NSAttributtedString

完整代码(针对 Swift5 更新)

    let nsRange = NSString(string: name).range(of: searchText, options: String.CompareOptions.caseInsensitive)

    if nsRange.location != NSNotFound
    {
        let attributedSubString = NSAttributedString.init(string: NSString(string: name).substring(with: nsRange), attributes: [NSAttributedString.Key.font : UIFont.boldSystemFont(ofSize: 17)])
        let normalNameString = NSMutableAttributedString.init(string: name)
        normalNameString.replaceCharacters(in: nsRange, with: attributedSubString)
        cell.name.attributedText = normalNameString
    }
    else
    {
        cell.name.text = name
    }