微信小程序之点赞和删除列表以及分享的功能实现

data:{ 
 likes:{ 
 iszan:false, 
 num:0 
} 
}

bindlike:function(e){ 
 var newData = this.data.release.map(function(item){ 
  if (item.id == e.currentTarget.dataset.id){ 
  console.log(item.id + e.currentTarget.dataset.id ) 
  if(item.likes.iszan){ 
   var obj = {} 
   obj.iszan = !item.likes.iszan; 
   obj.num = item.likes.num -1 ; 
   return Object.assign({},item,{likes:obj}) 
  }else { 
   var obj = {} 
   obj.iszan = !item.likes.iszan; 
   obj.num = item.likes.num + 1; 
   return Object.assign({}, item, { likes: obj }) 
  } 
  }else { 
  return item 
  } 
 }) 
 this.setData ({ 
  release:newData 
 }) 
 },

//删除评论 
 binddelete:function(e){ 
 var that = this; 
 wx.showModal({ 
  title: '提示', 
  content: '确认撤回吗？', 
 success:function(res){ 
  if(res.confirm){ 
 console.log('用户点击确定') 
 // 获取要删除数据的id 
 var dataid = e.currentTarget.dataset.id; 
 console.log(dataid) 
 // 删除数组对应的数据内容 
 var release = that.data.release; 
 that.data.release.splice(dataid,1) 
 //判断数据的长度 
 var len = that.data.release.length; 
 //通过判断数组的长度来决定是否显示隐藏的部分 
  that.setData ({ 
  release: that.data.release 
  }) 
  }else if(res.cancel){ 
  console.log('用户点击取消') 
  } 
 } 
 }) 
 },

Page({ 
 onShareAppMessage: function (res) { 
 if (res.from === 'button') { 
 // 来自页面内转发按钮 
 console.log(res.target) 
 } 
 return { 
 title: '自定义转发标题', 
 path: '/page/user?id=123' 
 } 
 } 
})