问如何用SwiftUI中的图像替换占位符文本？

EN

import PlaygroundSupport
import Foundation
import SwiftUI

extension String {

    func deletingPrefix(_ prefix: String) -> String {
        guard self.hasPrefix(prefix) else { return self }
        return String(self.dropFirst(prefix.count))
    }
}

extension LocalizedStringKey {
    
    @available(iOS 15, *)
    init(imageText: String, replacementClosure: (String) -> Any) {
        
        var components = [Any]()
        var length = 0
        let scanner = Scanner(string: imageText)
        scanner.charactersToBeSkipped = nil
        
        while scanner.isAtEnd == false {
            let up = scanner.scanUpToString("{")
            let start = scanner.scanString("{")
            let name = scanner.scanUpToString("}")
            let end = scanner.scanString("}")
            if let up = up {
                components.append(up)
                length += up.count
            }
            if let name = name {
                if start == nil || end == nil { self.init(stringLiteral: imageText) }
                let replacement = replacementClosure(name)
                
                switch replacement {
                    
                case let image as Image:
                    components.append(image)
                case let attributedString as AttributedString:
                    components.append(attributedString)
                case let plainString as String:
                    components.append(plainString)
                default:
                    print("No action.")
                }
            }
        }

        var interp = LocalizedStringKey.StringInterpolation(literalCapacity: length, interpolationCount: components.count)
        for component in components {
            if let string = component as? String {
                interp.appendInterpolation(string)
            }
            if let attrString = component as? AttributedString {
                interp.appendInterpolation(attrString)
            }
            if let image = component as? Image {
                interp.appendInterpolation(image)
            }
        }

        self.init(stringInterpolation: interp)
    }
}


extension Text {
    
    init(imageText: String) {
        self.init(LocalizedStringKey(imageText: imageText, replacementClosure: { string in
            
            switch string {
                
            case "world":
                return Image(systemName: "globe")
            case "moon":
                return Image(systemName: "moon")
            case let stylisedString where stylisedString.hasPrefix("style1__"):
                return AttributedString(stylisedString.deletingPrefix("style1__"), attributes: AttributeContainer().foregroundColor(.blue))
                
            default: return string
            }
        }))
    }
}


PlaygroundPage.current.setLiveView(Text(imageText: "Hello {world}! or {moon} or {style1__unmapped}")
)