delete(){
  wx.showModal({
   title: '',
   content: '是否确认删除',
   success(res) {
    if (res.confirm) {
     console.log('用户点击确定')
    } else if (res.cancel) {
     console.log('用户点击取消')
    }
   }
  })
 }

wx.showToast({
 title: '成功',
 icon: 'success',
 duration: 2000
})

wx.showLoading({
 title: '加载中',
})
 
setTimeout(function () {
 wx.hideLoading()
}, 2000)

wx.showActionSheet({
 itemList: ['A', 'B', 'C'],
 success: function(res) {
  console.log(res.tapIndex)
 },
 fail: function(res) {
  console.log(res.errMsg)
 }
})