微信小程序scroll-view(续)

scroll-view

使用scroll-view可滚动到对应区域,

注意: 使用竖向滚动时，需要给scroll-view一个固定高度，通过 WXSS 设置 height。

这里写两个应用场景的demo仅供参考，欢迎大神指点…

场景一：

项目中遇到需求：

1. 页面中有未知按钮【同一事件每一个按钮所执行的业务不一样】，
2. 点击当前按钮触发事件发送请求后端。数据回来后，页面显示相关数据并自动滑动到对应区域

效果图

wxml

 <!-- button -->
<view wx:for="{{getLocalPayData}}" wx:key="*this">
    <button class="" bindtap='startMeasure' id="NAV{{index}}" data-index="{{index}}" data-items='{{item}}' disabled="{{item.flagDisabled}}">
        {{item.flagText}}
    </button>
</view>


<!-- 内容 scroll-view -->
<scroll-view scroll-y scroll-with-animation="true" scroll-into-view="NAV{{toView}}" style="height: 400px;">
    <view class='measureDetailBox'>
        <view class='measureDetailList'>
            <view class='measureDetailItem' wx:for="{{saveAllSubmitData}}" wx:key="" id="NAV{{index}}">
                
            <!-- 其他内容 -->
                
            </view>
        </view>
    </view>
</scroll-view>

js

data: {
    toView: '', //初始化
}


/**
* 点击开台测量事件
*/
startMeasure: function(e) {
    // console.log('点击按钮获取', e);
    var that = this;
    let currentIndex = e.currentTarget.dataset.index;
    console.log('当前index:' + currentIndex);

    that.setData({
        currentIndex: currentIndex,
    })

    //改变按钮文本为 "测量中"
    that.data.getLocalPayData.forEach((item, i) => {
        if (Number(i) == that.data.currentIndex) {
            var setBtnTxt = "getLocalPayData[" + i + "].flagText";
            that.setData({
                [setBtnTxt]: "测量中",
            })
        }
    })
}


/**
 * 提交事件
 * 后端数据回来渲染页面并自动滚动到对应区域
 */
measureSubmit: function(paramVal) {
    var that = this;

    var params = {
        "orderitem_id": that.data.currentOrderId,
        "value1": paramVal.value1
    }

    http.postReq('users/gaugesends...', params, function(res) {
        console.log('测量成功返回的数据：', res);
        feedbackApi.hideTimerToast();

        if (res.code != 200) {
            feedbackApi.showToast({
                title: res.msg,
                mask: false
            })
            return
        }
		//保存数据
        let datas = res.data;
        //把每次提交的数据追加保存
        let allDatas = that.data.saveAllSubmitData.concat(datas);
        that.setData({
            saveAllSubmitData: allDatas,
        })
		
        //这里使用setTimeout,因先渲染数据.
        setTimeout(() => {
            //改变当前按钮状态
            that.data.getLocalPayData.forEach((item, i) => {
                if (Number(i) == that.data.currentIndex) {
                    var setDisabled = "getLocalPayData[" + i + "].flagDisabled";
                    var setBtnTxt = "getLocalPayData[" + i + "].flagText";
                    that.setData({
                        [setDisabled]: "true", //禁用button
                        [setBtnTxt]: "获取成功", //修改button文本
                        //保存当前index,赋值给scroll-into-view属性,滚动到对应区域
                        toView: that.data.currentIndex, 
                    })
                }
            })
        }, 800)
    })
},

场景二：

已上传过此demo, 横纵向可滚动， 请看下图

效果图

下图： 标题采用scroll-x横向滚动，内容采用scroll-y纵向滚动，当点击某个分类时滚动到对应区域

wxml

<!-- 使用scroll-view 滚动到对应位置 -->
<view class="scrollViewWrap">
    <!-- 分类 -->
    <view  class="cagetory-scroll">
        <scroll-view scroll-x="true" scroll-into-view="NAV{{status}}" scroll-with-animation="true">
            <text bindtap="getStatus" id="NAV{{index}}" class="cagetory-nav-li {{index === status ? 'cagetory-nav-active' : ''}}" data-index="{{index}}" wx:for="{{navList}}" wx:key="">{{item}}</text>
        </scroll-view>
    </view>

    <!-- 内容 -->
    <view class="cagetory-fixed-y">
        <scroll-view class="cagetory-scroll-y" scroll-y="true" scroll-into-view="NAV{{status}}" scroll-with-animation="true">
            <view wx:for="{{navList}}" wx:key="">
                <view id="NAV{{index}}" class="cagetory-list-head">{{item}}</view>
                <view class="cagetory-list-li">{{item}} 分类 {{index}}</view>
            </view>
        </scroll-view>
    </view>
</view>

js

Page({

    /**
     * 页面的初始数据
     */
    data: {
        toView: '',
        navList: [
            "关注",
            "推荐",
            "时常",
            "正能量",
            "科技",
            "运动",
            "小视频",
            "生活",
            "体育",
            "军事",
        ],
    },
    getStatus(e) {
        console.log('获取值', e);
        this.setData({
            // 获取当前index
            status: e.currentTarget.dataset.index,
        })
    },
})

wxss

以下样式可通过Webstorm编译为wxss

.scrollViewWrap {
    .cagetory-fixed-x {
        width: 100%;
        position: fixed;
        top: 0;
        left: 0;
    }

    .cagetory-scroll {
        height: 80rpx;
        line-height: 80rpx;
        width: 100%;
        white-space: nowrap;
        text {
            /* height: 120rpx;
            line-height: 80rpx;
            width: 100%;
            white-space: nowrap; */
        }
        .cagetory-nav-li {
            font-size: 33rpx;
            padding: 0 10rpx;
            &:first-of-type {
                padding-left: 16rpx;
            }
            &:last-of-type {
                padding-right: 16rpx;
            }
        }
         .cagetory-nav-active {
            color: red;
            border-bottom: 3rpx solid red;
        }
    }

    .cagetory-fixed-y {
        width: 100%;
        height: calc(100% - 200rpx);
        position: fixed;
        bottom: 0;
        left: 0;
        .cagetory-scroll-y {
            padding: 0 20rpx;
            height: 100%;
            box-sizing: border-box;
        }
        .cagetory-list-head {
            height: 50px;
            line-height: 50px;
            text-align: center;
            font-size: 30rpx;
            color: skyblue;
        }

        .cagetory-list-li {
            height: 400px;
            padding: 10rpx;
            color: #fff;
            font-size: 50rpx;
            background-color: skyblue;
        }
    } 
}