本文实例为大家分享了微信小程序实现底部弹出模态框的具体代码，供大家参考，具体内容如下

代码：

<view class="modals modals-bottom-dialog" hidden="{{hideModal}}" style="width:100%;height:{{widheight}}px"> <view class="modals-cancel" bindtap="hideModal"></view> <view class="bottom-dialog-body bottom-pos" animation="{{animationData}}"> <view class="comment_top"> <view></view> <view class="comment_num">{{comment.length}}条评论</view> <view class="comment_close" bindtap="hideModal">×</view> </view> <view class="comment_list"> <view class="comment_li" wx:for="{{comment}}" wx:key="{{index}}"> <image class="comment_li_img" src="{{item.headpic}}"></image> <view class="comment_li_info"> <view class="comment_li_name">{{item.nickname}}</view> <view class="comment_li_content">{{item.memo}} <text class="comment_li_date">9-24</text> </view> </view> </view> </view> <view class="comment_inputbox"> <input class="comment_input" maxlength="120" adjust-position value="{{commentform}}" bindinput="commentinput" placeholder="有何高见，讲来听听"></input> <view class="comment_sendbtn" bindtap="sendcomment">发送</view> </view> </view></view>

CSS:

.modals{ position:fixed; z-index: 100000; top:0; left: 0; right:0; bottom: 0; }.modals-cancel{ position:absolute; z-index:1000; top:0; left: 0; right:0; bottom: 0; }.bottom-dialog-body{ width: 99%; margin: 0 auto; position:absolute; z-index:10001; bottom:0; left:0; right:0; height:65%; background-color: #fff; border-top-left-radius: 10rpx; border-top-right-radius: 10rpx; overflow: hidden; display: flex; flex-direction: column; }.bottom-pos{ -webkit-transform:translateY(100%); transform:translateY(100%);}.comment_top{ width: 100%; display: flex; justify-content: space-between; align-items: center; border-bottom: 1rpx solid #f2f2f2; padding: 10rpx 24rpx; box-sizing: border-box;}.comment_num{ font-size: 30rpx;}.comment_close{ font-size: 62rpx; line-height: 50rpx;}.comment_list{ flex: 1; overflow: hidden;}.comment_li{ display: flex; padding: 10rpx 24rpx; box-sizing: border-box;}.comment_li_img{ width: 40rpx; height: 40rpx; border-radius: 50%; margin-right: 16rpx;}.comment_li_info{ flex: 1;}.comment_li_name{ font-size: 30rpx;}.comment_li_content{ font-size: 28rpx;}.comment_li_date{ color: #999; font-size: 24rpx; margin-left: 20rpx;}.comment_inputbox{ display: flex; padding: 20rpx 24rpx; box-sizing: border-box; align-items: center; justify-content: space-between; border-top: 1rpx solid #f2f2f2;}.comment_input{ font-size: 30rpx; flex: 1;}.comment_sendbtn{ font-size: 30rpx; background: #dd5923; color: #fff; padding: 5rpx 18rpx; border-radius: 10rpx;}

js:

Page({ data: { hideModal: true, //模态框的状态 true-隐藏 false-显示 animationData: {}, }, // 显示遮罩层 showModal: function () { var that = this; that.setData({ hideModal: false }) var animation = wx.createAnimation({ duration: 600,//动画的持续时间 默认400ms 数值越大，动画越慢 数值越小，动画越快 timingFunction: 'ease',//动画的效果 默认值是linear }) this.animation = animation setTimeout(function () { that.fadeIn();//调用显示动画 }, 200) }, // 隐藏遮罩层 hideModal: function () { var that = this; var animation = wx.createAnimation({ duration: 800,//动画的持续时间 默认400ms 数值越大，动画越慢 数值越小，动画越快 timingFunction: 'ease',//动画的效果 默认值是linear }) this.animation = animation that.fadeDown();//调用隐藏动画 setTimeout(function () { that.setData({ hideModal: true }) }, 720)//先执行下滑动画，再隐藏模块 }, //动画集 fadeIn: function () { this.animation.translateY(0).step() this.setData({ animationData: this.animation.export()//动画实例的export方法导出动画数据传递给组件的animation属性 }) }, fadeDown: function () { this.animation.translateY(300).step() this.setData({ animationData: this.animation.export(), }) },})

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