如何在 iOS Safari 上设置渐变背景透明度?

How to set gradient background transparency on iOS Safari?

以下 CSS 在 Safari 上不起作用(在 iPad iOS 上测试):

.map-left-navi {
    background: #ffffff;
    background: -moz-linear-gradient(left, #ffffff 35%, transparent 100%);
    background: -webkit-linear-gradient(left, #ffffff 35%,transparent 100%);
    background: linear-gradient(to right, #ffffff 35%,transparent 100%);
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='transparent',GradientType=1 );
}

关于保持透明度的解决方法有什么想法吗?

编辑 - 解决方案:

使用 rgba CSS 颜色值:

.map-left-navi {
    background: #ffffff;
    background: -moz-linear-gradient(left, rgba(255,255,255, 0.35), rgba(255,255,255, 0));
    background: -webkit-linear-gradient(left, rgba(255,255,255, 0.35), rgba(255,255,255, 0));
    background: linear-gradient(to right, rgba(255,255,255, 0.35), rgba(255,255,255, 0));
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='transparent',GradientType=1 );
}

使用 rgba 而不是透明。

.map-left-navi {
    background: #ffffff;
    background: -moz-linear-gradient(left, rgba(255,255,255, 0.35), rgba(255,255,255, 0));
    background: -webkit-linear-gradient(left, rgba(255,255,255, 0.35), rgba(255,255,255, 0));
    background: linear-gradient(to right, rgba(255,255,255, 0.35), rgba(255,255,255, 0));
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='transparent',GradientType=1 );
}