document how to export consts from a swift native module

vonovak · facebook-github-bot · commit 1de9a35f140d · 2017-08-03T13:13:25.000-07:00
Summary: I documented how to export consts from a swift native module. Closes react#15340 Differential Revision: D5556264 Pulled By: hramos fbshipit-source-id: 0374f1c291e3c15424c8e53fef7ab30c60643165
diff --git a/docs/NativeModulesIOS.md b/docs/NativeModulesIOS.md
@@ -438,6 +438,10 @@ class CalendarManager: NSObject {
   func addEvent(name: String, location: String, date: NSNumber) -> Void {
     // Date is ready to use!
   }
+  
+  override func constantsToExport() -> [String: Any]! {
+    return ["someKey": "someValue"]
+  }
 
 }
 ```

Original file line number	Diff line number	Diff line change
`@@ -438,6 +438,10 @@ class CalendarManager: NSObject {`
`438`	`438`	`func addEvent(name: String, location: String, date: NSNumber) -> Void {`
`439`	`439`	`// Date is ready to use!`
`440`	`440`	`}`
	`441`	`+`
	`442`	`+ override func constantsToExport() -> [String: Any]! {`
	`443`	`+ return ["someKey": "someValue"]`
	`444`	`+ }`
`441`	`445`
`442`	`446`	`}`
`443`	`447`	```