feat(ios): add databinding error handling

Author: HayesGordon

example/app/(examples)/DataBinding.tsx

@@ -8,9 +8,9 @@ import {
 } from 'react-native';
 import Rive, {
   AutoBind,
-  BindByIndex,
-  BindByName,
-  BindEmpty,
+  // BindByIndex,
+  // BindByName,
+  // BindEmpty,
   Fit,
   RNRiveError,
   RNRiveErrorType,

ios/RNRiveError.swift

@@ -14,6 +14,7 @@ struct RNRiveError {
     static let IncorrectStateMachineName = BaseRNRiveError(type: "IncorrectStateMachineName")
     static let IncorrectStateMachineInput = BaseRNRiveError(type: "IncorrectStateMachineInput")
     static let TextRunNotFoundError = BaseRNRiveError(type: "TextRunNotFoundError")
+    static let DataBindingError = BaseRNRiveError(type: "DataBindingError")
 
 
     static func mapToRNRiveError(riveError: NSError) -> BaseRNRiveError? {
@@ -47,6 +48,9 @@ struct RNRiveError {
         case "TextRunNotFoundError":
             resultError = RNRiveError.TextRunNotFoundError
             break;
+        case "DataBindingError":
+            resultError = RNRiveError.DataBindingError
+            break;    
         default:
             return nil
         }

ios/RiveReactNativeView.swift

@@ -217,7 +217,26 @@ class RiveReactNativeView: RCTView, RivePlayerDelegate, RiveStateMachineDelegate
               let dataBindingViewModel = viewModel.riveModel?.riveFile.defaultViewModel(for: artboard) else { return }
 
         func bindInstance(_ instance: RiveDataBindingViewModel.Instance?) {
-            guard let instance = instance else { return }
+            guard let instance = instance else {
+                var error = RNRiveError.DataBindingError
+                let configDescription: String = {
+                    switch dataBindingConfig {
+                    case .autoBind(let value):
+                        return "autoBind(\(value))"
+                    case .index(let value):
+                        return "index(\(value))"
+                    case .name(let value):
+                        return "name(\(value))"
+                    case .empty:
+                        return "empty"
+                    case .none:
+                        return "none"
+                    }
+                }()
+                error.message = "Failed to create data binding instance with config: \(configDescription)"
+                onRNRiveError(error)
+                return
+            }
             viewModel.riveModel?.stateMachine?.bind(viewModelInstance: instance)
             self.dataBindingViewModelInstance = instance
 
@@ -736,7 +755,12 @@ class RiveReactNativeView: RCTView, RivePlayerDelegate, RiveStateMachineDelegate
             }
         }()
 
-        guard let reg = registration else { return }
+        guard let reg = registration else {
+            var error = RNRiveError.DataBindingError;
+            error.message = "\(propertyType) property not found at path: \(path)"
+            onRNRiveError(error)
+            return
+        }
 
         // Send initial value
         eventEmitter?.sendEvent(withName: key, body: reg.initialValue)