头部和信号栏一个颜色appcloud

<header  id="header" >
        <ul   >
            <li class="active" onclick="api.closeWin();" ><img class=" mar-left-10 back_img"  src="../image/back.png" alt=""></li>
            <li class="active text-center" >登录</li>
            <li class="active text-right " onclick="registerUser();"><span class="mar-right-15">注册</span></li>
        </ul>
        <div class="cl"></div>
    </header>

 var header = $api.byId('header');
        $api.fixIos7Bar(header);
        $api.fixStatusBar(header);
        var headerPos = $api.offset(header);

<preference name="statusBarAppearance" value="true"/>
  <preference name="iOS7StatusBarAppearance" value="true"/>