微信小程序实现常见弹出层效果

微信小程序实现常见弹出层效果，实现起来很简单，就是通过三目运算符来控制遮罩层的显示和隐藏。请看本文给大家做的例子。

先看效果：

规则按钮：

<text class='rule' bindtap='showRule'>规则</text>

遮罩层：我这个数据是从后台拿来动态渲染到页面的：

<!--  规则提示  -->
    <view class="ruleZhezhao {{isRuleTrue?'isRuleShow':'isRuleHide'}}">
        <view class='ruleZhezhaoContent'>
            <view class='ruleZhezhaoText' wx:for='{{rule}}' wx:for-index='index'>
                <text>{{index+1}}</text>
                <text>{{item}}</text>
            </view>
            <image src='../../images/rule-hide.png' class='ruleHide' bindtap='hideRule'></image>
        </view>
    </view>
<!--  end  -->

css：

/* 规则提示层  */
.isRuleShow{
    display: block;
}
.isRuleHide{
    display: none;
}
.ruleZhezhao{
    height: 100%;
    width: 100%;
    position: fixed;
    background-color:rgba(0, 0, 0, .5);
    z-index: 2;
    top: 0;
    left: 0;
}
.ruleZhezhaoContent{
    padding: 20rpx 0;
    width: 80%;
    background: #e1d2b1;
    margin: 40% auto;
    border-radius: 20rpx;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    align-items: center;
    position: relative;
}
.ruleZhezhaoText{
    width: 80%;
    font-size: 30rpx;
    color: #856d5f;
    display: flex;
    flex-direction: row;
    align-items: center;
    margin: 25rpx 0 25rpx 0;
}
.ruleZhezhaoText text:nth-child(1){
    color: #fff;
    font-size: 40rpx;
    height: 60rpx;
    width: 60rpx;
    background: #664a2c;
    display: block;
    text-align: center;
    line-height: 60rpx;
    border-radius: 30rpx;
    margin-right: 10rpx;
}
.ruleZhezhaoText text:nth-child(2){
    flex-wrap:wrap;
    width: 80%;
}
.ruleHide{
    height: 60rpx!important;
    width: 60rpx!important;
    position: absolute;
    top: -20rpx;
    right: -20rpx;
}
.rule{
    display: block;
    border: 1px solid #fff;
    width: 100rpx;
    text-align: center;
    line-height: 60rpx;
    color: #fff;
    height: 60rpx;
    font-size: 30rpx;
    border-radius: 30rpx;
    position: absolute;
    top: 10%;
    right: 5%;
}
/*  end  */

点击规则按钮：

//打开规则提示
showRule: function () {
    this.setData({
        isRuleTrue: true
    })
},

点击关闭按钮：

//关闭规则提示
hideRule: function () {
    this.setData({
        isRuleTrue: false
    })
},