Iphone Swift3.0无法转换类型为'；ClosedRange<；指数>'；输入'；范围<；指数>'；

我正试图将Swift 2.3迁移到3.0，并在转换后面对这个问题。任何关于我做错了什么的建议

Swift 3.0： 错误： 让selectorString=key.replacingCharacters（in:range，with:uppercasedFirstCharacter）

您可以使用Swift 3+

override func setValue(_ value: Any?, forKey key: String) {
        let upperCaseFirstCharacter = String(key.characters.first!).uppercased()
        let range = key.startIndex..<key.index(key.startIndex, offsetBy: 1)
        let selectorString = key.replacingCharacters(in: range, with: upperCaseFirstCharacter)

        let selector = NSSelectorFromString("set\(selectorString):")
        let responds = self.responds(to: selector)

        if !responds{
            return
        }
        super.setValue(value, forKey: key)
    }

    init(dictionary: [String: Any]){
        super.init()
        setValuesForKeys(dictionary)
    }

override func setValue（value:Any？，forKey:String）{
让upperCaseFirstCharacter=String（key.characters.first！）.uppercased（）
让range=key.startIndex。。
Cannot convert value of type 'ClosedRange<Index>' (aka 'ClosedRange<String.CharacterView.Index>') to expected argument type 'Range<Index>' (aka 'Range<String.CharacterView.Index>')

override func setValue(value: AnyObject?, forKey key: String) {
    let uppercasedFirstCharacter = String(key.characters.first!).uppercaseString

    let range = key.startIndex...key.startIndex.advancedBy(0)
    let selectorString = key.stringByReplacingCharactersInRange(range, withString: uppercasedFirstCharacter)

    let selector = NSSelectorFromString("set\(selectorString):")
    let responds = self.respondsToSelector(selector)

    if !responds {
        return
    }

let range = key.startIndex..<key.index(key.startIndex, offsetBy: 1)
// range is now type Range<Index>

extension String { 
   var firstCharacterUppercased: String {
        guard case let c = self.characters,
                   let c1 = c.first else { return self }
        return String(c1).uppercased() + String(c.dropFirst())
    }
}

/* example usage */
let key = "fooBar"
let selectorString = key.firstCharacterUppercased

print(selectorString) // FooBar

override func setValue(_ value: Any?, forKey key: String) {
        let upperCaseFirstCharacter = String(key.characters.first!).uppercased()
        let range = key.startIndex..<key.index(key.startIndex, offsetBy: 1)
        let selectorString = key.replacingCharacters(in: range, with: upperCaseFirstCharacter)

        let selector = NSSelectorFromString("set\(selectorString):")
        let responds = self.responds(to: selector)

        if !responds{
            return
        }
        super.setValue(value, forKey: key)
    }

    init(dictionary: [String: Any]){
        super.init()
        setValuesForKeys(dictionary)
    }