xcode preview could not be built into project

Question

canvas preview has an error just like that:

UnknownPreviewProviderError: Unknown preview provider "AboutView_Previews" 买就返.app does not contain a preview provider named "AboutView_Previews". Check your build settings to ensure the preview provider is compiled into your product. Mangled name: 3买就返18AboutView_PreviewsV

Error Domain=com.apple.dt.UITestingAgent Code=-1 "Preview provider "3买就返18AboutView_PreviewsV" does not exist" UserInfo={NSLocalizedDescription=Preview provider "3买就返18AboutView_PreviewsV" does not exist}

ihave check the "build setting" -> "build options" -> "Enable Previews" is Yes

import SwiftUI
struct ContentView: View {

    var body: some View {
        TabView {
            HomeView()
                .tabItem {
                    Image("tabbarHome")
                    Text("首页")
            }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

It looks like Xcode issue due to 买就返 application name. You can use English product name and [this](https://stackoverflow.com/questions/2871990/how-to-localize-bundle-display-name-in-iphone-app) topic of how to make app name localized. — Asperi, Dec 13 '19 at 05:50

score 2 · Accepted Answer · answered Dec 13 '19 at 09:17

2

just change App name ("Buy back") it will solve your issue

answered Dec 13 '19 at 09:17

Hardik Bar

1,660
18
27

3

Please elaborate on why your answer will solve the problem. – RyanNerd Dec 13 '19 at 12:16
because by default localization is not support you need to provide localization of your name to Chineeze and after you can do that – Hardik Bar Dec 13 '19 at 12:23

score 2 · Answer 2 · answered May 31 '20 at 02:08

I have the same issue when I modify the Product Name(at Target -> Packing -> Product Name) to Chinese word.

The right way to use Chinese word as App name:

open info.plist
add Bundle display name with the name you want.

Use this way to change app name will not effect SwiftUI Previews.

score 1 · Answer 3 · answered Jun 22 '22 at 18:10

1

There was a similar error when the project name started with a digit (for example, 30-project-name). I just renamed the project with a name without numbers at the beginning

answered Jun 22 '22 at 18:10

Alex F

29
3

xcode preview could not be built into project

3 Answers3