Using reflection to add the UNNotificationActionIcon

This is pretty ugly because we cannot use performSelector withObject. That method only allows up to 2 arguments so we must use NSInvocation.

iOS_SDK/OneSignalSDK/Source/OneSignalHelper.m

@@ -567,20 +567,46 @@ + (UNNotificationRequest*)prepareUNNotificationRequest:(OSNotification*)notifica
 }
 
 + (UNNotificationAction *)createActionForButton:(NSDictionary *)button {
+ NSString *buttonId = button[@"id"];
+ NSString *buttonText = button[@"text"];
+
  if (@available(iOS 15.0, *)) {
- UNNotificationActionIcon *icon;
- if (button[@"systemIcon"]) {
- icon = [UNNotificationActionIcon iconWithSystemImageName:button[@"systemIcon"]];
- } else if (button[@"templateIcon"]) {
- icon = [UNNotificationActionIcon iconWithTemplateImageName:button[@"templateIcon"]];
+ // Using reflection for Xcode versions lower than 13
+ id icon; // UNNotificationActionIcon
+ let UNNotificationActionIconClass = NSClassFromString(@"UNNotificationActionIcon");
+ if (UNNotificationActionIconClass) {
+ if (button[@"systemIcon"]) {
+ icon = [UNNotificationActionIconClass performSelector:@selector(iconWithSystemImageName:)
+ withObject:button[@"systemIcon"]];
+ } else if (button[@"templateIcon"]) {
+ icon = [UNNotificationActionIconClass performSelector:@selector(iconWithTemplateImageName:)
+ withObject:button[@"templateIcon"]];
+ }
  }
- return [UNNotificationAction actionWithIdentifier:button[@"id"]
- title:button[@"text"]
- options:UNNotificationActionOptionForeground
- icon:icon];
+
+ // We need to use NSInvocation because performSelector only allows up to 2 arguments
+ SEL actionSelector = NSSelectorFromString(@"actionWithIdentifier:title:options:icon:");
+ UNNotificationAction * __unsafe_unretained action;
+ NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UNNotificationAction methodSignatureForSelector:actionSelector]];
+ [invocation setTarget:[UNNotificationAction class]];
+ [invocation setSelector:actionSelector];
+ /*
+ From Apple's Documentation on NSInvocation:
+ Indices 0 and 1 indicate the hidden arguments self and _cmd, respectively;
+ you should set these values directly with the target and selector properties.
+ Use indices 2 and greater for the arguments normally passed in a message.
+ */
+ NSUInteger actionOption = UNNotificationActionOptionForeground;
+ [invocation setArgument:&buttonId atIndex:2];
+ [invocation setArgument:&buttonText atIndex:3];
+ [invocation setArgument:&actionOption atIndex:4];
+ [invocation setArgument:&icon atIndex:5];
+ [invocation invoke];
+ [invocation getReturnValue:&action];
+ return action;
  } else {
- return [UNNotificationAction actionWithIdentifier:button[@"id"]
- title:button[@"text"]
+ return [UNNotificationAction actionWithIdentifier:buttonId
+ title:buttonText
  options:UNNotificationActionOptionForeground];
  }
 }