小程序mask层（自己写的）

核心代码如下

<button  bindtap="show_shelter">点击显示遮罩层</button>
<view class="modal_shelter  {{showing==true? 'showing' : ''}}" bindtap="hide_shelter"></view>


Page({
    data: {
        showing:false
    },
    onLoad: function (options) {
    },
    onReady: function () {
    },
    onShow: function () {
    },
    show_shelter:function(){
        this.setData({
            showing:true
        })
    },
    hide_shelter:function(){
        this.setData({
            showing:false
        })
    }
})


.modal_shelter {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 2110;
    opacity: 0;
    outline: 0;
    text-align: center;
    -ms-transform: scale(1.185);
    transform: scale(1.185);
    /*backface-visibility: hidden;perspective: 2000rpx;*/
    background: rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease-in-out 0s;
    pointer-events: none;
}

.showing {
    opacity: 1;
    transition-duration: 0.3s;
    -ms-transform: scale(1);
    transform: scale(1);
    overflow-x: hidden;
    overflow-y: auto;
    pointer-events: auto;
}