设置弹出窗淡出后 主界面背景不灰

mx|Alert{
    modal-transparency:0.0;
    modal-transparency-blur:0;
}

s|TitleWindow.loginWindowStyle
{
    backgroundAlpha: 0.8;
/*    backgroundColor: #FEE1E2;*/
    backgroundColor: #7ECCF7;
    cornerRadius: 35;
    dropShadowVisible: true;
    skinClass: ClassReference("IaasWindowSkin");
    textAlign: left;
    /* 设置弹出窗后的主窗口的模糊效果为透明*/
    modal-transparency:0.0;
    modal-transparency-blur:0;
}