SwiftUI-Translate-MLKit.swift

import SwiftUI
import FirebaseMLNLTranslate

struct ContentView: View {
    
    @State var name: String = ""
    @State var languageTranslate: String = ""
    
    var body: some View {
        
        VStack(alignment: .center, spacing: 20){
            TextField("Enter some text", text: $name)
                .font(.system(size: 20))
                .multilineTextAlignment(.center)
            
            Text(languageTranslate)

            Button(action: translate, label: {
                Text("Language Translate").foregroundColor(.blue)
            })
        }
    }
    
    func translate(){
        
        let options = TranslatorOptions(sourceLanguage: .zh, targetLanguage: .en)
        let translator = NaturalLanguage.naturalLanguage().translator(options: options)
        
        let conditions = ModelDownloadConditions(
            allowsCellularAccess: true,
            allowsBackgroundDownloading: true
        )
        translator.downloadModelIfNeeded(with: conditions) { error in
            guard error == nil else { return }
            
            translator.translate(self.name){
                (translatedText, error) in
                
                guard error == nil,
                    let translatedText = translatedText
                    else {return }
                self.languageTranslate = translatedText
            }
        }
    }
    
}