小程序-demo：妹纸图

ylbtech-小程序-demo：妹纸图

ylb

1.返回顶部
0、
   
1、app.js
//app.js
App({
  onLaunch: function () {
    //调用API从本地缓存中获取数据
    var logs = wx.getStorageSync('logs') || []
    logs.unshift(Date.now())
    wx.setStorageSync('logs', logs)
  },
  getUserInfo:function(cb){
    var that = this
    if(this.globalData.userInfo){
      typeof cb == "function" && cb(this.globalData.userInfo)
    }else{
      //调用登录接口
      wx.login({
        success: function () {
          wx.getUserInfo({
            success: function (res) {
              that.globalData.userInfo = res.userInfo
              typeof cb == "function" && cb(that.globalData.userInfo)
            }
          })
        }
      })
    }
  },
  globalData:{
    userInfo:null
  }
})
2、app.json
{
  "pages":[
    "pages/index/index",
    "pages/image/image"
  ],
  "window":{
    "backgroundTextStyle":"dark",
    "navigationBarBackgroundColor": "#fff",
    "navigationBarTitleText": "妹纸图",
    "navigationBarTextStyle":"black"
  }
}
3、app.wxss
/**app.wxss**/
4、project.config.json
{
    "description": "项目配置文件。",
    "packOptions": {
        "ignore": []
    },
    "setting": {
        "urlCheck": false,
        "es6": true,
        "postcss": true,
        "minified": true,
        "newFeature": true
    },
    "compileType": "miniprogram",
    "libVersion": "2.2.3",
    "appid": "wx7d22ab7088f2db6a",
    "projectname": "meiziApp",
    "isGameTourist": false,
    "condition": {
        "search": {
            "current": -1,
            "list": []
        },
        "conversation": {
            "current": -1,
            "list": []
        },
        "game": {
            "currentL": -1,
            "list": []
        },
        "miniprogram": {
            "current": -1,
            "list": []
        }
    }
}
5、pages
-image
-index
6、utils
-constant.js
//url相关
var BASE_URL = "http://gank.io/api";
var GET_MEIZHI_URL = BASE_URL.concat("/data/%E7%A6%8F%E5%88%A9/10/");

// 将方法、变量暴露出去
module.exports = {
    BASE_URL: BASE_URL,
    GET_MEIZHI_URL: GET_MEIZHI_URL
}
-util.js
// 工具类
function formatTime(date) {
  var year = date.getFullYear()
  var month = date.getMonth() + 1
  var day = date.getDate()

  var hour = date.getHours()
  var minute = date.getMinutes()
  var second = date.getSeconds()


  return [year, month, day].map(formatNumber).join('/') + ' ' + [hour, minute, second].map(formatNumber).join(':')
}

function formatNumber(n) {
  n = n.toString()
  return n[1] ? n : '0' + n
}

module.exports = {
  formatTime: formatTime
}
7、
2. pages返回顶部
1、image
a) .js
Page({
    data: {
        url: "",
        hidden: false,
        toastHidden: true,
        modalHidden: true,
        toastText: "数据异常",
        loadingText: "加载中..."
    },

    onLoad: function (options) {
        that = this;
        if (options == null || options.url == null) {
            this.setData({ hidden: true, toastHidden: false });
            return;
        }

        this.setData({
            hidden: true,
            toastHidden: true,
            url: options.url
        })
    },
    //Toast信息改变
    onToastChanged: function (event) {
        this.setData({ toastHidden: true });
    },
    // 长按
    onlongclick: function () {
        this.setData({ modalHidden: false });
    },
    // 保存
    onSaveClick: function (event) {
        var mUrl = "";
        if (event.currentTarget.dataset.url != null)
            mUrl = event.currentTarget.dataset.url;
        console.log("download：" + mUrl);
        saveImage(mUrl);
    },
    // 取消
    onCancelClick: function (event) {
        this.setData({ modalHidden: true });
    },
});

var that;
/**
 * 保存图片
 */
function saveImage(mUrl) {
    that.setData({
        hidden: false,
        toastHidden: true,
        modalHidden: true,
        loadingText: "下载中..."
    });
    wx.downloadFile({
        url: mUrl,
        type: 'image',
        success: function (res) {
            console.log("download success");
            that.setData({
                hidden: true,
                toastHidden: false,
                toastText: "恭喜你，图片保存成功"
            });
        },
        fail: function (res) {
            console.log("download fail");
            that.setData({
                hidden: true,
                toastHidden: false,
                toastText: "保存失败，请稍后再试"
            });
        },
        complete: function (res) {
            console.log("download complete");
        }
    })
}
b) .json
{}
c) .wxml
<!--image.wxml-->
<view >
    <loading hidden="{{hidden}}" >
     {{loadingText}}
    </loading>

    <toast hidden="{{toastHidden}}" bindchange="onToastChanged">
        {{toastText}}
    </toast>

<view bindlongtap = "onlongclick">
    <image class = "bigImage" mode="aspectFill" src="{{url}}" />
</view>

<modal title="是否保存？" confirm-text="保存" cancel-text="取消" data-url="{{url}}" 
    hidden="{{modalHidden}}" bindconfirm="onSaveClick" bindcancel="onCancelClick">
</modal>

</view>
d) .wxss
/*image.wxss*/
.bigImage{
    width: 95%;
    height: 1000rpx;
    margin: auto;
    overflow: auto;   
    position: absolute;  
    top: 0; left: 0; bottom: 0; right: 0;  
}
e)
2、index
a) .js
//index.js
//获取应用实例
var app = getApp()
Page({
  data: {
    items: [],
    hidden: false,
    loading: false,
    // loadmorehidden:true,
    plain: false
  },

  onItemClick: function (event) {
    var targetUrl = "/pages/image/image";
    if (event.currentTarget.dataset.url != null)
      targetUrl = targetUrl + "?url=" + event.currentTarget.dataset.url;
    wx.navigateTo({
      url: targetUrl
    });
  },

  // loadMore: function( event ) {
  //   var that = this
  //   requestData( that, mCurrentPage + 1 );
  // },

  onReachBottom: function () {
    console.log('onLoad')
    var that = this
    that.setData({
      hidden: false,
    });
    requestData(that, mCurrentPage + 1);
  },

  onLoad: function () {
    console.log('onLoad')
    var that = this
    requestData(that, mCurrentPage + 1);
  }

})

/**
 * 定义几个数组用来存取item中的数据
 */
var mUrl = [];
var mDesc = [];
var mWho = [];
var mTimes = [];
var mTitles = [];

var mCurrentPage = 0;

// 引入utils包下的js文件
var Constant = require('../../utils/constant.js');

/**
 * 请求数据
 * @param that Page的对象，用来setData更新数据
 * @param targetPage 请求的目标页码
 */
function requestData(that, targetPage) {
  wx.showToast({
    title: '加载中',
    icon: 'loading'
  });
  wx.request({
    url: Constant.GET_MEIZHI_URL + targetPage,
    header: {
      "Content-Type": "application/json"
    },
    success: function (res) {
      if (res == null ||
        res.data == null ||
        res.data.results == null ||
        res.data.results.length <= 0) {

        console.error("god bless you...");
        return;
      }


      for (var i = 0; i < res.data.results.length; i++)
        bindData(res.data.results[i]);

      //将获得的各种数据写入itemList，用于setData
      var itemList = [];
      for (var i = 0; i < mUrl.length; i++)
        itemList.push({ url: mUrl[i], desc: mDesc[i], who: mWho[i], time: mTimes[i], title: mTitles[i] });

      that.setData({
        items: itemList,
        hidden: true,
        // loadmorehidden:false,
      });

      mCurrentPage = targetPage;

      wx.hideToast();
    }
  });
}

/**
 * 绑定接口中返回的数据
 * @param itemData Gank.io返回的content;
 */
function bindData(itemData) {

  var url = itemData.url.replace("//ww", "//ws");
  var desc = itemData.desc;
  var who = itemData.who;
  var times = itemData.publishedAt.split("T")[0];

  mUrl.push(url);
  mDesc.push(desc);
  mWho.push(who);
  mTimes.push(times);
  mTitles.push("publish by：" + "@" + who + " —— " + times);
}
b) .json
{}
c) .wxml
<!--index.wxml-->
<view>

  <view class= "card" wx:for = "{{items}}">
  
    <view  data-url="{{item.url}}" bindtap = "onItemClick">
       <image class= "image" mode="aspectFill" src="{{item.url}}"/>
       <view class="title">{{item.title}}</view>
    </view>

  </view>

</view>
d) .wxss
/**index.wxss**/
.card {
    border: 2px solid #ffffff;
    border-radius: 5px;
    background-color: #ffffff;
    box-shadow: 0px 5px 1px #cccccc;
    margin: 8px;
    position: relative;
}

.loadmore {
    border: 0px solid #ffffff;
    border-radius: 5px;
    background-color: #ffffff;
    box-shadow: 0px 5px 1px #cccccc;
    margin: 8px;
}

.image{
  width:100%;
  height:240px; 
}

.title {
    padding: 14px;
    font-size: 14px;
}
e)
3、
3.返回顶部
 
4.返回顶部
1、https://gank.io/api/data/%E7%A6%8F%E5%88%A9/10/1
{"error":false,"results":[{"_id":"5b7b836c9d212201e982de6e","createdAt":"2018-08-21T11:13:48.989Z","desc":"2018-08-21","publishedAt":"2018-08-21T00:00:00.0Z","source":"web","type":"u798fu5229","url":"https://ws1.sinaimg.cn/large/0065oQSqly1fuh5fsvlqcj30sg10onjk.jpg","used":true,"who":"lijinshanmx"},{"_id":"5b74e9409d21222c52ae4cb4","createdAt":"2018-08-16T11:02:24.289Z","desc":"2018-08-16","publishedAt":"2018-08-16T00:00:00.0Z","source":"api","type":"u798fu5229","url":"https://ws1.sinaimg.cn/large/0065oQSqly1fubd0blrbuj30ia0qp0yi.jpg","used":true,"who":"lijinshan"},{"_id":"5b7102749d2122341d563844","createdAt":"2018-08-13T12:00:52.458Z","desc":"2018-08-13","publishedAt":"2018-08-13T00:00:00.0Z","source":"api","type":"u798fu5229","url":"https://ww1.sinaimg.cn/large/0065oQSqly1fu7xueh1gbj30hs0uwtgb.jpg","used":true,"who":"lijinshan"},{"_id":"5b6bad449d21226f45755582","createdAt":"2018-08-09T10:56:04.962Z","desc":"2018-08-09","publishedAt":"2018-08-09T00:00:00.0Z","source":"web","type":"u798fu5229","url":"https://ww1.sinaimg.cn/large/0065oQSqgy1fu39hosiwoj30j60qyq96.jpg","used":true,"who":"lijinshanmx"},{"_id":"5b67b7fd9d2122195bdbd806","createdAt":"2018-08-06T10:52:45.809Z","desc":"2018-08-06","publishedAt":"2018-08-06T00:00:00.0Z","source":"api","type":"u798fu5229","url":"https://ww1.sinaimg.cn/large/0065oQSqly1ftzsj15hgvj30sg15hkbw.jpg","used":true,"who":"lijinshan"},{"_id":"5b63cd4e9d21225e0d3f58c9","createdAt":"2018-08-03T11:34:38.672Z","desc":"2018-08-03","publishedAt":"2018-08-03T00:00:00.0Z","source":"api","type":"u798fu5229","url":"https://ww1.sinaimg.cn/large/0065oQSqgy1ftwcw4f4a5j30sg10j1g9.jpg","used":true,"who":"lijinshan"},{"_id":"5b6151509d21225206860f08","createdAt":"2018-08-01T14:21:04.556Z","desc":"2018-08-01","publishedAt":"2018-08-01T00:00:00.0Z","source":"api","type":"u798fu5229","url":"https://ww1.sinaimg.cn/large/0065oQSqly1ftu6gl83ewj30k80tites.jpg","used":true,"who":"lijinshan"},{"_id":"5b60356a9d212247776a2e0e","createdAt":"2018-07-31T18:09:46.825Z","desc":"2018-07-31","publishedAt":"2018-07-31T00:00:00.0Z","source":"api","type":"u798fu5229","url":"http://ww1.sinaimg.cn/large/0065oQSqgy1ftt7g8ntdyj30j60op7dq.jpg","used":true,"who":"lijinshan"},{"_id":"5b5e93499d21220fc64181a9","createdAt":"2018-07-30T12:25:45.937Z","desc":"2018-07-30","publishedAt":"2018-07-30T00:00:00.0Z","source":"web","type":"u798fu5229","url":"https://ww1.sinaimg.cn/large/0065oQSqgy1ftrrvwjqikj30go0rtn2i.jpg","used":true,"who":"lijinshanmx"},{"_id":"5b50107f421aa917a31c0565","createdAt":"2018-07-19T12:15:59.226Z","desc":"2018-07-19","publishedAt":"2018-07-19T00:00:00.0Z","source":"web","type":"u798fu5229","url":"https://ww1.sinaimg.cn/large/0065oQSqly1ftf1snjrjuj30se10r1kx.jpg","used":true,"who":"lijinshanmx"}]}
2、
5.返回顶部
0、
1、
 
6.返回顶部
 
warn 作者：ylbtech
出处：http://ylbtech.cnblogs.com/
本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。
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原文地址：https://www.cnblogs.com/storebook/p/9513112.html