发送oa消息内容，苹果手机无图片显示，安卓手机有图片显示

PHP的，消息构造如下：
$messsage = [
     'message_url' => "http:// www.myweb.com/index " ,
     'head' => [ 'text' => 'fulishangchengxiaoxi' ],
     'body' => [
         'title' => '亲，您收到一份新的消息' ,
         'content' => 'gong xi ni' ,
         'image' => "http://shp.qpic.cn/bizmp/DNRicxNn38WRO30qQnEywTPkJc0wzxp3gBMPiaDZ2FPicic2qWeSS0FSsg/"
     ]
];
发送方法为：
public static function sendLinkMessage( $corp_id , $permanent_code , $toUsers , $agent_id , $message )
{
     $touser = '' ;
     if ( is_array ( $toUsers )) {
         foreach ( $toUsers as $toUser ) {
             $touser = $touser . $toUser . '|' ;
        }
         if ( count ( $toUsers ) > 0 ) {
             $touser = substr ( $touser , 0 , - 1 );
        }
    } else {
         if ( $toUsers == '@all' ) {
             $touser = $toUsers ;
        }
    }


     $message = [
         'touser' => $touser ,
         'agentid' => $agent_id ,
         'msgtype' => 'oa' ,
         'oa' => $message ,
    ];
     $message = json_decode(json_encode( $message ));
     $access_toke = Dingtalk:: getIsvCorpAccessToken ( $corp_id , $permanent_code );

     $url = 'https://oapi.dingtalk.com/message/send?access_token=' . $access_toke ;
     $result = HttpUtility:: post ( $url , $message , true );
     $result = json_decode( $result );

     return $result ;
} 经检验，安卓手机能够收到并显示消息，苹果手机能够收到但是显示不了图片，这个如何解决。