Question

这是我的代码

class AmDocViewController: UIViewController,UITextViewDelegate {
    var text1:String!
    let replaceYName: String = "text1"

    var textA:String!
    let replaceFName: String = "textA"

    var textB:String!
    let replaceyGFName: String = "textB"

    @IBOutlet weak var myTextView: UITextView!
override func viewDidLoad() {
        super.viewDidLoad()
        myTextView.delegate = self;
        self.view.endEditing(true)

 let notes37 = NSAttributedString(string:"""
(SOME SAMPLE TEXT......)
""", attributes:[NSAttributedStringKey.foregroundColor: UIColor.gray])

 let newMutableString77 = notes37.mutableCopy() as! NSMutableAttributedString
        newMutableString77.append(notes37)

myTextView.attributedText = newMutableString77 as NSAttributedString

        let originalString = myTextView.text

        let updatedString = originalString?.replacingOccurrences(of: replaceYName, with: text1)
        let updatedString1 = updatedString?.replacingOccurrences(of: replaceFName, with: textA)

        if textB == "" {
            let updatedString2 = updatedString1?.replacingOccurrences(of: str25, with: "N/A")
        }
        if textB != ""{
            let updatedString2 = updatedString1?.replacingOccurrences(of: replaceyGFName, with: textB)
        }

        myTextView.text = updatedString2

        myTextView.textAlignment = NSTextAlignment.center
    }

在if语句行中获取以下错误消息

Argument type 'NSAttributedString' does not conform to expected type 'StringProtocol'

请建议如何使用从其他ViewController TextField（text1）接收的String值并替换TextView中的属性String？

Answer 1

<强>首先： Apple文档定义的StringProtocol：

可以将字符串表示为字符集合的类型。

我假设变量str25是NSAttributedString这是导致错误的原因。确保您传递到replacingOccurrences(of:with:)的变量属于String

类型

您可以采取的另一种方法是将String转换为NSMutableAttributedString，此对象具有var mutableString: NSMutableString { get }属性

返回可变字符串对象

然后您可以在replacingOccurrences(of:with:)方法

中使用此功能

NSAttributedString没有成员replacementOccurrences错误

1 个答案: