纠正mutable-content参数

Author: liaodong

src/JPush/PushPayload.php

@@ -356,7 +356,7 @@ private function generateSendno() {
 
     # new methods
     public function iosNotification($alert = '', array $notification = array()) {
-        # $required_keys = array('sound', 'badge', 'content-available', 'mutable-available', category', 'extras');
+        # $required_keys = array('sound', 'badge', 'content-available', 'mutable-content', category', 'extras');
         $ios = array();
         $ios['alert'] = (is_string($alert) || is_array($alert)) ? $alert : '';
         if (!empty($notification)) {
@@ -369,8 +369,8 @@ public function iosNotification($alert = '', array $notification = array()) {
             if (isset($notification['content-available']) && is_bool($notification['content-available']) && $notification['content-available']) {
                 $ios['content-available'] = $notification['content-available'];
             }
-            if (isset($notification['mutable-available']) && is_bool($notification['mutable-available']) && $notification['mutable-available']) {
-                $ios['mutable-available'] = $notification['mutable-available'];
+            if (isset($notification['mutable-content']) && is_bool($notification['mutable-content']) && $notification['mutable-content']) {
+                $ios['mutable-content'] = $notification['mutable-content'];
             }
             if (isset($notification['category']) && is_string($notification['category'])) {
                 $ios['category'] = $notification['category'];