iOS Question Create a WhatsApp Stickers App

[asales]

With a help of ChatGPT I'm trying to create an iOS Sticker App for WhatsApp based in this link:

stickers/iOS at main · WhatsApp/stickers

This repository contains the iOS and Android sample apps and API for creating third party sticker packs for WhatsApp. - WhatsApp/stickers

github.com

The project (so far) is in attach.

I'm using the Hosted Builder and I get this error:
error: 'StickerPackManager.h' file not found
The actual file is "StickerPackManager.swift"

How can I proceed with this project?

Thanks in advance for any tips.

Spoiler: ChatGPT Instructions

1. Practical path (what you need to do)
1.1. Prepare the assets and the sticker_packs.wasticker file
This part is identical to the official iOS sample:

• Follow the official image rules (512×512, <100 KB, 3–30 stickers, 96×96 tray icon).
• Create the sticker_packs.wasticker file (a JSON-based metadata file) containing:
  • identifier (the pack ID),
  • name,
  • publisher,
  • tray_image_file,
  • list of image_file items.

You can even use Android-side JSON/pack generators as long as you adjust the fields to match the iOS structure.

​

---

1.2. Integrate the WhatsApp sample project into the Xcode project generated by B4i

Typical workflow:

1. In B4i, generate a Release build and download the app’s Xcode project.
2. Open the generated Xcode project.
3. Inside Xcode, add the folders/classes from the WAStickersThirdParty iOS sample (or at least the core files such as Sticker.swift, StickerPack.swift, StickerPackManager, etc.).
4. Copy the following into your app bundle:
   • all sticker images,
   • the sticker_packs.wasticker file.
5. In your Info.plist, add:

'<key>LSApplicationQueriesSchemes</key>
'<array>
'<string>whatsapp</string>
'</array>
#QueriesSchemes: whatsapp

This allows the app to open the whatsapp:// URL scheme on iOS.

---

1.3. Create an Objective-C wrapper usable from B4i

In B4i, you can embed inline Objective-C code using #If OBJC.
Your goal is to expose a simple method that invokes the same logic used by the “Add to WhatsApp” button in the official iOS sample.

Example:

B4i side:

Sub AddStickerPackToWhatsApp (Identifier As String, Name As String)
  Dim no As NativeObject = Me
  no.RunMethod("addStickerPackToWhatsApp::", Array(Identifier, Name))
End Sub

Sub btnAdd_Click
  Dim packId As String = "my_pack_01"
  Dim packName As String = "Cuppy Stickers"
  AddStickerPackToWhatsApp(packId, packName)
End Sub

Objective-C wrapper inside the same B4i module:

#If OBJC
#import "StickerPackManager.h" // or the equivalent header from WAStickersThirdParty
- (void)addStickerPackToWhatsApp:(NSString *)identifier :(NSString *)name {
// You will copy/adapt this code from the official iOS sample.
// Example logic:
//
// StickerPack *pack = [StickerPackManager stickerPackWithIdentifier:identifier];
// if (pack) {
// [StickerPackManager addStickerPackToWhatsApp:pack
// completionHandler:^(BOOL success, NSError *error) {
// // Optional: handle callback
// }];
// }
}
#End If

The main implementation inside addStickerPackToWhatsApp must be copied from the original Sample Project, since that’s the code that builds and validates the sticker pack and triggers WhatsApp import.