[iOS] Update calculator files

Author: Riccardo Cipolleschi

README.md

@@ -8,6 +8,7 @@ Start from there up to the `[TurboModule] Test the Turbomodule` section. Then, f
 * [[Setup] Update to 0.71-RC.3](#update)
 * [[Setup] Update podspec](#update-podspec)
 * [[Swift] Add Swift files](#swift)
+* [[iOS] Update Calculator file](#update-calculator)
 
 ## Steps
 
@@ -87,3 +88,28 @@ end
       }
     }
     ```
+
+### <a name="upadet-calculator" />[[iOS] Update Calculator file]()
+
+1. Open the `calculator/ios/RNCalculator.mm` file and update the logic to invoke the Swift one
+    ```diff
+    #ifdef RCT_NEW_ARCH_ENABLED
+    #import "RNCalculatorSpec.h"
+    #endif
+
+    + #import "calculator-Swift.h"
+
+    @implementation RNCalculator
+
+    RCT_EXPORT_MODULE(Calculator)
+
+    RCT_REMAP_METHOD(add, addA:(NSInteger)a
+                            andB:(NSInteger)b
+                    withResolver:(RCTPromiseResolveBlock) resolve
+                    withRejecter:(RCTPromiseRejectBlock) reject)
+    {
+    -    NSNumber *result = [[NSNumber alloc] initWithInteger:a+b];
+    +    NSNumber *result = @([Calculator addWithA:a b:b]);
+        resolve(result);
+    }
+    ```

calculator/ios/RNCalculator.mm

@@ -4,6 +4,8 @@
 #import "RNCalculatorSpec.h"
 #endif
 
+#import "calculator-Swift.h"
+
 @implementation RNCalculator
 
 RCT_EXPORT_MODULE()
@@ -26,7 +28,7 @@ @implementation RNCalculator
 #endif
 
 - (void)add:(double)a b:(double)b resolve:(RCTPromiseResolveBlock)resolve reject:(RCTPromiseRejectBlock)reject {
-  NSNumber *result = [[NSNumber alloc] initWithInteger:a+b];
+  NSNumber *result = @([Calculator addWithA:a b:b]);
   resolve(result);
 }