Taro UI開發小程序實現左滑喜歡右滑不喜歡效果

摘要:css

      年後入職了一家新公司,與前同事交接完以後,發現公司有一個四端的項目(iOS,Android,H5,小程序),iOS和安卓都實現了左滑右滑的效果,而h5和小程序端沒實現,詢問得知前同事因網上沒找到對應的插件,相關博客也特別少,因此沒作就擱置下來了。html

      趁這段時間相對來講比較富裕,因而乎在網上也搜索了一下,發現確實不多,可是有人提到能夠用小程序可拖動組件movable-view來實現,本身嘗試來一下發現可行,因而來寫這篇博客記錄一下,但願能幫助到後面須要用到這個功能的人!vue

 

先上效果圖:小程序

 

 

主要技術Taro+Taro UI+React(若是你是小程序原生或者uniapp+vue寫法都差很少,能夠通用)微信小程序

可拖動組件文檔地址:數組

Tarohttps://taro-docs.jd.com/taro/docs/components/viewContainer/movable-view.html微信

微信小程序https://developers.weixin.qq.com/miniprogram/dev/component/movable-view.htmlapp

 

思路:ide

,咱們首先把movable-areamovable-view標籤寫出來;flex

<movable-area>
    <movable-view>
       ......
    </movable-view>
</movable-area>

,咱們能夠看到文檔裏面有一個onChange方法,即拖動過程當中觸發的事件;

<movable-area>
    <movable-view onChange ={this. onChange.bind(this)}>
       ......
    </movable-view>
</movable-area> // 觸發方法,打印參數
onChange(e) {
   console.log('參數',e);
}

咱們能夠看到打印出了,拖動的位置產生移動的緣由等

,咱們接着加入開始onTouchstart,移動onTouchmove,結束onTouchcancel,onTouchend三個事件方法;

<MovableView  
  key={item.id} 
  onTouchcancel={this.onCancel} 
  onTouchend={this.onCancel} 
  onTouchstart={this.onTouchStart} 
  onTouchmove={this.onTouchMove} 
  x={this.state.x}  // 橫座標位置
  y={this.state.y}  // 縱座標位置
  direction='all'  // 移動方向均可以
  outOfBounds  // 可超過可移動區域
  className='shop-imgbox' 
> 
<--中間加入圖片之類的滑動內容-->
</MovableView> 
                    

初始數據以下:

state = { 
    x: '16', 
    y: '16', 
    like: false, 
    unlike: false, 
    shopList: [ 
      { 
        img: 'https://edgefix-image.edgecom.top/ABD846F6672997A7F76CD38E8A57F954.jpg', 
      }, 
      { 
        img: 'https://edgefix-image.edgecom.top/F6E5801C304CC76DA63C02C9FB38B8F4.jpg', 
      }, 
      { 
        img: 'https://edgefix-image.edgecom.top/D518952AD1DD61B2D32556E20CC527C4.jpg', 
      }, 
      { 
        img: 'https://edgefix-image.edgecom.top/1D187E28B349679908A44BBE81F3D3CA.jpg', 
      }, 
      { 
        img: 'https://edgefix-image.edgecom.top/1129A411AC9CF5F81187CBED181B6F57.jpg', 
      } 
    ] 
  } 

三個方法咱們能夠取到移動後改變的位置,來改變喜歡與不喜歡的狀態css,以及實現卡片滑動的效果:

1.觸摸觸發的時候,咱們獲取到剛剛開始觸摸卡片的x,y的位置座標

2.在觸摸滑動時,咱們經過滑動後的位置-滑動前的位置,來判斷距離多少來改變喜歡和不喜歡的值

3.當手離開時,觸發取消事件,咱們須要把狀態數據改成原始值,即回到最初的狀態;

// 觸摸觸發 
  onTouchStart(e) { 
    console.log('222',e.touches[0].pageX); 
    this.setState({ 
      x: e.touches[0].pageX, 
      y: e.touches[0].pageY, 
    }); 
  } 
  // 觸摸移動 
  onTouchMove(e) { 
    console.log('333',e.touches[0].pageX); 
    let dx = e.touches[0].pageX - this.state.x; 
    if (dx > 50) { 
      this.setState({ 
        like: true, 
        unlike: false, 
      }); 
    } else if (dx < -50) { 
      this.setState({ 
        like: false, 
        unlike: true, 
      }); 
    } else { 
      this.setState({ 
        like: false, 
        unlike: false, 
      }); 
    } 
  } 
  // 取消 
  onCancel(e) { 
    console.log('444',e.changedTouches[0].pageX); 
    this.setState({ 
      x: '16', 
      y: '16', 
      like: false, 
      unlike: false, 
    }); 
  } 

當咱們寫到這裏,咱們去拖動咱們的卡片時,你會發現確實能夠拖動,而且取消的時候會回到原點,可是一樣你也會發現一個問題,就是你拖動的時候,五張卡片都被觸發來移動的效果,出現了觸點混亂的問題,查找問題發現卡片共用了x,y,所以咱們能夠給每張卡片設置獨立的參數

,給每張卡片獨立的參數而且設置卡片傾斜度效果;

1.設置傾斜度效果

style={{transform:'rotate('+this.state.tiltAngle[index]+'deg)'}}

而後咱們經過卡片移動位置計算出一個你決定合適的傾斜角度;

// 拖動後相差距離進行換算角度
let dxangle = (e.touches[0].pageX - this.state.startX) * 45 / 500;

2.設置獨立的參數

方法攜帶索引,咱們取到對應的卡片index,來改變對應卡片的數據;

<MovableView 
  key={item.id}
  onTouchcancel={this.onCancel.bind(this,index)}
  onTouchend={this.onCancel.bind(this,index)}
  onTouchstart={this.onTouchStart.bind(this,index)}
  onTouchmove={this.onTouchMove.bind(this,index)}
  x={this.state.x[index]} 
  y={this.state.y[index]} 
  direction='all' 
  outOfBounds 
  className='shop-imgbox'
>
</MovableView>

同時,咱們須要改變初始參數的形式爲數組,咱們經過索引改變對應卡片的值;

state = {
    // 開始位置
    startX: '',
    // 開始位置-最終位置距離
    placeX: '',
    // 傾斜角度
    tiltAngle: ['0','0','0','0','0'],
    // 座標
    x: ['16','16','16','16','16'],
    y: ['16','16','16','16','16'],
    // 是否喜歡狀態
    like: [false,false,false,false,false],
    unlike: [false,false,false,false,false],
    // 推薦商品數組
    shopList: [
      {
        id: 1,
        img: 'https://edgefix-image.edgecom.top/ABD846F6672997A7F76CD38E8A57F954.jpg',
      },
      {
        id: 2,
        img: 'https://edgefix-image.edgecom.top/F6E5801C304CC76DA63C02C9FB38B8F4.jpg',
      },
      {
        id: 3,
        img: 'https://edgefix-image.edgecom.top/D518952AD1DD61B2D32556E20CC527C4.jpg',
      },
      {
        id: 4,
        img: 'https://edgefix-image.edgecom.top/1D187E28B349679908A44BBE81F3D3CA.jpg',
      },
      {
        id: 5,
        img: 'https://edgefix-image.edgecom.top/1129A411AC9CF5F81187CBED181B6F57.jpg',
      }
    ]
  }

方法咱們就舉一個例子,好比onTouchStart方法,咱們遍歷卡片數組,經過判斷索引來獲得是那張卡片,從而來改變對應值

// 觸摸觸發
  onTouchStart(index,e) {
    console.log('1111',index,e.touches[0].pageX,e.touches[0].pageY);
    // 重定義數組
    var againX = [];
    var againY = [];
    // 遍歷,判斷拖動的該數組的位置
    for (var i=0; i<this.state.shopList.length; i++){
      if (i == index) {
        againX[i] = e.touches[0].pageX;
        againY[i] = e.touches[0].pageY;
      } else {
        againX[i] = '16';
        againY[i] = '16';
      }
    }
    // 賦值
    this.setState({
      startX: e.touches[0].pageX,
      x: againX,
      y: againY,
    });
  }

這樣,咱們運行代碼,發現拖動第一張卡片不會影響到後面卡片的位置了,

同時,咱們如今拖動卡片刪除的是數組,在實際項目中,咱們在觸發刪除數組的地方接入接口,調用喜歡,不喜歡改變數據參數,從而也能改變數組的長度;

,完整代碼;

下面我將貼出完整的代碼供你們參考

html文件:

import Taro, { Component } from '@tarojs/taro';
import { View, Image, Button, Text, MovableArea, MovableView } from '@tarojs/components';
import { observer, inject } from '@tarojs/mobx';
import { AtButton, AtFloatLayout  } from 'taro-ui';
import userStore from '../../store/user.store';

import './stroll.scss';

@inject('userStore')
@observer
class Stroll extends Component {
  config = {
    navigationBarTitleText: '逛',
  }

  state = {
    // 開始位置
    startX: '',
    // 開始位置-最終位置距離
    placeX: '',
    // 傾斜角度
    tiltAngle: ['0','0','0','0','0'],
    // 座標
    x: ['16','16','16','16','16'],
    y: ['16','16','16','16','16'],
    // 是否喜歡狀態
    like: [false,false,false,false,false],
    unlike: [false,false,false,false,false],
    // 推薦商品數組
    shopList: [
      {
        id: 1,
        img: 'https://edgefix-image.edgecom.top/ABD846F6672997A7F76CD38E8A57F954.jpg',
      },
      {
        id: 2,
        img: 'https://edgefix-image.edgecom.top/F6E5801C304CC76DA63C02C9FB38B8F4.jpg',
      },
      {
        id: 3,
        img: 'https://edgefix-image.edgecom.top/D518952AD1DD61B2D32556E20CC527C4.jpg',
      },
      {
        id: 4,
        img: 'https://edgefix-image.edgecom.top/1D187E28B349679908A44BBE81F3D3CA.jpg',
      },
      {
        id: 5,
        img: 'https://edgefix-image.edgecom.top/1129A411AC9CF5F81187CBED181B6F57.jpg',
      }
    ]
  }

  componentWillMount () { }

  componentWillReact () { }

  componentDidMount () {
  }

  // 觸摸觸發
  onTouchStart(index,e) {
    console.log('1111',index,e.touches[0].pageX,e.touches[0].pageY);
    // 重定義數組
    var againX = [];
    var againY = [];
    // 遍歷,判斷拖動的該數組的位置
    for (var i=0; i<this.state.shopList.length; i++){
      if (i == index) {
        againX[i] = e.touches[0].pageX;
        againY[i] = e.touches[0].pageY;
      } else {
        againX[i] = '16';
        againY[i] = '16';
      }
    }
    // 賦值
    this.setState({
      startX: e.touches[0].pageX,
      x: againX,
      y: againY,
    });
  }
  // 觸摸離開
  onTouchMove(index,e) {
    console.log('2222',index,e.touches[0].pageX,e.touches[0].pageY);
    // 重定義數組
    var tiltAngleT = [];
    var againX = [];
    var againY = [];
    // 拖動後相差距離
    let dxplace = e.touches[0].pageX - this.state.startX;
    // 拖動後相差距離進行換算角度
    let dxangle = (e.touches[0].pageX - this.state.startX) * 45 / 500;
    console.log(dxangle);
    // 遍歷,判斷拖動的該數組的位置
    for (var i=0; i<this.state.shopList.length; i++){
      if (i == index && dxplace > 50) {
        tiltAngleT[i] = dxangle,
        againX[i] = true;
        againY[i] = false;
      } else if (i == index && dxplace <= -50) {
        tiltAngleT[i] = dxangle,
        againX[i] = false;
        againY[i] = true;
      } else if (i == index && dxplace < 50 && dxplace > -50) {
        tiltAngleT[i] = dxangle,
        againX[i] = false;
        againY[i] = false;
      } else {
        tiltAngleT[i] = '0',
        againX[i] = false;
        againY[i] = false;
      }
    }
    // 賦值
    this.setState({
      placeX: dxplace,
      tiltAngle: tiltAngleT,
      like: againX,
      unlike: againY,
    });
  }
  // 取消
  onCancel(index,e) {
    console.log('3333',index,e.changedTouches[0].pageX,e.changedTouches[0].pageY);
    // 賦值
    this.setState({
      tiltAngle: ['0','0','0','0','0'],
      x: ['16','16','16','16','16'],
      y: ['16','16','16','16','16'],
      like: [false,false,false,false,false],
      unlike: [false,false,false,false,false],
    });
    // 若是偏移已經達到則清除第一張圖片
    if (this.state.placeX > 50 || this.state.placeX < -50) {
      this.setState({
        shopList: this.state.shopList.splice(1,4),
      });
    }
  }
  // 不喜歡按鈕點擊
  dislikebtn() {
    // 改變按鈕的狀態以及圖片位置及顯示
    this.setState({
      tiltAngle: ['-18','0','0','0','0'],
      x: ['-30','16','16','16','16'],
      y: ['267','16','16','16','16'],
      unlike: [true,false,false,false,false],
    }, () => {
      setTimeout( () => {
        this.setState({
          tiltAngle: ['0','0','0','0','0'],
          x: ['16','16','16','16','16'],
          y: ['16','16','16','16','16'],
          unlike: [false,false,false,false,false],
          shopList: this.state.shopList.splice(1,4),
        });
      },100);
    });
  }
  // 喜歡按鈕點擊
  likebtn() {
    // 改變按鈕的狀態以及圖片位置及顯示
    this.setState({
      tiltAngle: ['18','0','0','0','0'],
      x: ['284','16','16','16','16'],
      y: ['267','16','16','16','16'],
      like: [true,false,false,false,false],
    }, () => {
      setTimeout( () => {
        this.setState({
          tiltAngle: ['0','0','0','0','0'],
          x: ['16','16','16','16','16'],
          y: ['16','16','16','16','16'],
          like: [false,false,false,false,false],
          shopList: this.state.shopList.splice(1,4),
        });
      },100);
    });
  }

  componentWillUnmount () { }

  componentDidShow () {
  }

  componentDidHide () { }

  render() {
    return (
      <View className='stroll-tab'>
        <View className='stroll-text'>
          <Text className='text-tip1'>搭配師天天爲你推薦5件單品</Text>
          <View className='text-tip2'>
            <Text className='t1'>右滑喜歡</Text>
            <Image src={require('./img/ic_like.png')} className='icon-image'></Image>
            <Text className='t1'>,左滑不喜歡</Text>
            <Image src={require('./img/ic_dislike.png')} className='icon-image'></Image>
          </View>
        </View>
        {
          this.state.shopList.length != 0&&
          <MovableArea className='stroll-shop'>
            {
            this.state.shopList&&this.state.shopList.map((item,index) => {
              return(
                <MovableView 
                  key={item.id}
                  onTouchcancel={this.onCancel.bind(this,index)}
                  onTouchend={this.onCancel.bind(this,index)}
                  onTouchstart={this.onTouchStart.bind(this,index)}
                  onTouchmove={this.onTouchMove.bind(this,index)}
                  x={this.state.x[index]} 
                  y={this.state.y[index]} 
                  direction='all' 
                  outOfBounds 
                  className='shop-imgbox'
                >
                  <View className='images-box' style={{transform:'rotate('+this.state.tiltAngle[index]+'deg)'}}>
                    <Image src={item.img} className='images'></Image>
                    {
                      this.state.like[index]==true&&
                      <Image src={require('./img/text_like.png')} className='imagelike'></Image>
                    }
                    {
                      this.state.unlike[index]==true&&
                      <Image src={require('./img/text_dislike.png')} className='imageunlike'></Image>
                    }
                  </View>
                </MovableView>
            );})
            }
          </MovableArea>
        }
        {
          this.state.shopList.length === 0&&
          <View className='noshop-card'>
            <Image src={require('./img/noshop.png')} className='noshop-image'></Image>
          </View>
        }
        <View className='stroll-fotter'>
          {
            this.state.shopList.length != 0&&
            <View className='fot-twoimg'>
              {
                this.state.unlike[0]==false&&
                <Image src={require('./img/dislike_default.png')} className='dislike-image' onClick={this.dislikebtn.bind(this)}></Image>
              }
              {
                this.state.unlike[0]==true&&
                <Image src={require('./img/dislike_click.png')} className='dislike-image'></Image>
              }
              {
                this.state.like[0]==false&&
                <Image src={require('./img/like_default.png')} className='like-image' onClick={this.likebtn.bind(this)}></Image>
              }
              {
                this.state.like[0]==true&&
                <Image src={require('./img/like_click.png')} className='like-image'></Image>
              }
            </View>
          }
          <Text className='fot-text'>查看我喜歡的</Text>
        </View>
      </View>
    );
  }
}

export default Stroll;

css文件:

page {
  height: 100%;
  background: #F6F6F6;
}

.stroll-tab {
  width: 100%;
  min-height: 100vh;
  background: #F6F6F6;
  .stroll-text {
    width: 100%;
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    .text-tip1 {
      font-size: 28px;
      color: #333333;
    }
    .text-tip2 {
      display: flex;
      flex-direction: row;
      align-items: center;
      .t1 {
        font-size: 28px;
        color: #333333;
      }
      .icon-image {
        width:20px;
        height:20px;
      }
    }
  }
  .stroll-shop {
    width: 100%;
    height: 700px;
    margin-top: 40px;
    .shop-imgbox {
      height: 600px;
      border-radius: 24px;
      .images-box {
        width: 100%;
        height: 520px;
        border-radius: 24px;
        box-shadow: 0px 2px 5px 0px rgba(0,0,0,0.1);
        background-color: #fff;
        position: relative;
        .images {
          width: 606px;
          height: 480px;
          position: absolute;
          left: 40px;
          top: 20px;
        }
        .imagelike {
          width: 96px;
          height: 48px;
          position: absolute;
          right: 40px;
          top: 20px;
        }
        .imageunlike {
          width: 148px;
          height: 48px;
          position: absolute;
          left: 40px;
          top: 20px;
        }
      }
    }
    .shop-imgbox:nth-child(1) {
      width: 686px;
      z-index: 50;
    }
    .shop-imgbox:nth-child(2) {
      width: 676px;
      z-index: 40;
      margin: 15px 0px 0px 5px;
    }
    .shop-imgbox:nth-child(3) {
      width: 666px;
      z-index: 30;
      margin: 30px 0px 0px 10px;
    }
    .shop-imgbox:nth-child(4) {
      width: 656px;
      z-index: 20;
      margin: 0px 0px 0px 15px;
    }
    .shop-imgbox:nth-child(5) {
      width: 646px;
      z-index: 10;
      margin: 0px 0px 0px 20px;
    }
  }
  .noshop-card {
    width: 100%;
    margin-top: 40px;
    padding: 0px 16px;
    .noshop-image {
      width: 100%;
      height: 806px;
    }
  }
  .stroll-fotter {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 20px;
    .fot-twoimg {
      display: flex;
      flex-direction: row;
      align-items: center;
      .dislike-image {
        width: 120px;
        height: 120px;
      }
      .like-image {
        width: 120px;
        height: 120px;
        margin-left: 48px;
      }
    }
    .fot-text {
      color: #368BE5;
      font-size: 28px;
      margin-top: 40px;
      margin-bottom: 50px;
    }
  }
}

好了,小程序左滑右滑效果就說到這裏了,若是你們有更好的辦法請在下方留言,上述的方法可能一下拖動效果之類的還須要加以完善,有什麼好的建議和改善歡迎提出,謝謝了🙏

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