Document tintColor option for ActionSheetIOS (#36)

* Document `tintColor` option for ActionSheetIOS

also:
- fixed the `showActionSheetWithOptions` example

This option was added in facebook/react-native#4590

FYI, this is not even documented in the comments
https://github.com/facebook/react-native/blob/master/Libraries/ActionSheetIOS/ActionSheetIOS.js#L28

Are the docs generated from the code? Should I update that instead?

* add tintColor option in docs/ folder as well

Author: gianpaj

docs/actionsheetios.md

@@ -20,13 +20,15 @@ title: ActionSheetIOS
 static showActionSheetWithOptions(options, callback)
 ```
 
-Display an iOS action sheet. The `options` object must contain one or more of:
-
-* `options` (array of strings) - a list of button titles (required)
-* `cancelButtonIndex` (int) - index of cancel button in `options`
-* `destructiveButtonIndex` (int) - index of destructive button in `options`
-* `title` (string) - a title to show above the action sheet
-* `message` (string) - a message to show below the title
+Display an iOS action sheet. The `options` object must contain one or more
+of:
+
+- `options` (array of strings) - a list of button titles (required)
+- `cancelButtonIndex` (int) - index of cancel button in `options`
+- `destructiveButtonIndex` (int) - index of destructive button in `options`
+- `title` (string) - a title to show above the action sheet
+- `message` (string) - a message to show below the title
+- `tintColor` (string) - the [color](colors.md) used for non-destructive button titles
 
 The 'callback' function takes one parameter, the zero-based index of the selected item.
 

website/versioned_docs/version-0.51/actionsheetios.md

@@ -21,13 +21,15 @@ original_id: actionsheetios
 static showActionSheetWithOptions(options, callback)
 ```
 
-Display an iOS action sheet. The `options` object must contain one or more of:
+Display an iOS action sheet. The `options` object must contain one or more
+of:
 
-* `options` (array of strings) - a list of button titles (required)
-* `cancelButtonIndex` (int) - index of cancel button in `options`
-* `destructiveButtonIndex` (int) - index of destructive button in `options`
-* `title` (string) - a title to show above the action sheet
-* `message` (string) - a message to show below the title
+- `options` (array of strings) - a list of button titles (required)
+- `cancelButtonIndex` (int) - index of cancel button in `options`
+- `destructiveButtonIndex` (int) - index of destructive button in `options`
+- `title` (string) - a title to show above the action sheet
+- `message` (string) - a message to show below the title
+- `tintColor` (string) - the [color](colors.md) used for non-destructive button titles
 
 The 'callback' function takes one parameter, the zero-based index of the selected item.
 
@@ -36,8 +38,8 @@ Minimal example:
 ```
 ActionSheetIOS.showActionSheetWithOptions({
   options: ['Remove', 'Cancel'],
-  destructiveButtonIndex: 1,
-  cancelButtonIndex: 0,
+  destructiveButtonIndex: 0,
+  cancelButtonIndex: 1,
 },
 (buttonIndex) => {
   if (buttonIndex === 1) { /* destructive action */ }