fix(ios): unrecognized selector sent to instance when using props

A critical issue was introduced by #505 that breaks usage of any of the following props on iOS platform:
- `permissions`
- `defaultAudience`
- `nonceIOS`
- `loginTrackingIOS`
- `tooltipBehaviorIOS`

This commit exposes the underlying `FBSDKLoginButton` property on the custom `RCTFBSDKLoginButtonView` wrapper,
and re-exports these props as custom properties with the correct viewClass for correct static type checking.

Author: habovh

ios/RCTFBSDK/login/RCTFBSDKLoginButtonManager.m

@@ -41,23 +41,32 @@ - (UIView *)view
 
 RCT_EXPORT_VIEW_PROPERTY(onChange, RCTBubblingEventBlock)
 
-RCT_EXPORT_VIEW_PROPERTY(permissions, NSStringArray)
+RCT_CUSTOM_VIEW_PROPERTY(permissions, NSStringArray, RCTFBSDKLoginButtonView)
+{
+    [view.loginButton setPermissions:json ? json : nil];
+}
 
-RCT_EXPORT_VIEW_PROPERTY(defaultAudience, FBSDKDefaultAudience)
+RCT_CUSTOM_VIEW_PROPERTY(defaultAudience, FBSDKDefaultAudience, RCTFBSDKLoginButtonView)
+{
+    if (json)
+    {
+        [view.loginButton setDefaultAudience:[RCTConvert FBSDKDefaultAudience:json]];
+    }
+}
 
-RCT_CUSTOM_VIEW_PROPERTY(nonceIOS, NSString, FBSDKLoginButton)
+RCT_CUSTOM_VIEW_PROPERTY(nonceIOS, NSString, RCTFBSDKLoginButtonView)
 {
-    [view setNonce:json ? json : nil];
+    [view.loginButton setNonce:json ? json : nil];
 }
 
-RCT_CUSTOM_VIEW_PROPERTY(loginTrackingIOS, NSString, FBSDKLoginButton)
+RCT_CUSTOM_VIEW_PROPERTY(loginTrackingIOS, NSString, RCTFBSDKLoginButtonView)
 {
-    [view setLoginTracking:([json isEqualToString:@"limited"]) ? FBSDKLoginTrackingLimited : FBSDKLoginTrackingEnabled];
+    [view.loginButton setLoginTracking:([json isEqualToString:@"limited"]) ? FBSDKLoginTrackingLimited : FBSDKLoginTrackingEnabled];
 }
 
-RCT_CUSTOM_VIEW_PROPERTY(tooltipBehaviorIOS, FBSDKLoginButtonTooltipBehavior, FBSDKLoginButton)
+RCT_CUSTOM_VIEW_PROPERTY(tooltipBehaviorIOS, FBSDKLoginButtonTooltipBehavior, RCTFBSDKLoginButtonView)
 {
-  [view setTooltipBehavior:json ? [RCTConvert FBSDKLoginButtonTooltipBehavior:json] : FBSDKLoginButtonTooltipBehaviorAutomatic];
+  [view.loginButton setTooltipBehavior:json ? [RCTConvert FBSDKLoginButtonTooltipBehavior:json] : FBSDKLoginButtonTooltipBehaviorAutomatic];
 }
 
 

ios/RCTFBSDK/login/RCTFBSDKLoginButtonView.h

@@ -5,6 +5,8 @@
 
 @interface RCTFBSDKLoginButtonView: UIView<FBSDKLoginButtonDelegate>
 
+@property (nonatomic, strong) FBSDKLoginButton *loginButton;
+
 @property (nonatomic, copy) RCTBubblingEventBlock onChange;
 
 @end

ios/RCTFBSDK/login/RCTFBSDKLoginButtonView.m

@@ -8,8 +8,6 @@
 
 @interface RCTFBSDKLoginButtonView ()
 
-@property (nonatomic, strong) FBSDKLoginButton *loginButton;
-
 @end
 
 @implementation RCTFBSDKLoginButtonView