微信小程序实现拖拽功能

// pages/cateDetaile/cateDetaile.js
const app = getApp()
Page({
 
  
  data: {
    // 拖拽参数
    writePosition: [80, 90], //默认定位参数
    writesize: [0, 0],// X Y 定位
    window: [0, 0], //屏幕尺寸
    write: [0, 0], //定位参数
    scrolltop: 0,//据顶部距离
  },
 
  
  onLoad: function (options) {
    // 在页面中定义插屏广告
    let that = this;
    that.getSysdata();
  },
  //计算默认定位值
  getSysdata: function () {
    var that = this;
    wx.getSystemInfo({
      success: function (e) {
 that.data.window = [e.windowWidth, e.windowHeight];
 var write = [];
 write[0] = that.data.window[0] * that.data.writePosition[0] / 100;
 write[1] = that.data.window[1] * that.data.writePosition[1] / 100;
 console.log(write,45)
 that.setData({
   write: write
 }, function () {
   // 获取元素宽高
   wx.createSelectorQuery().select('.collectBox').boundingClientRect(function (res) {
     console.log(res.width)
     that.data.writesize = [res.width, res.height];
   }).exec();
 })
      },
      fail: function (e) {
 console.log(e)
      }
    });
  },
  //开始拖拽  
  touchmove: function (e) {
    var that = this;
    var position = [e.touches[0].pageX - that.data.writesize[0] / 2, e.touches[0].pageY - that.data.writesize[1] / 2 - this.data.scrolltop];
    that.setData({
      write: position
    });
  },
  onPageScroll(e) {
    this.data.scrolltop = e.scrollTop;
  },
})

总结

以上所述是小编给大家介绍的微信小程序实现拖拽功能,希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对考高分网网站的支持！
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