微信小程序下載文件

<button bindtap="download">下載</button>

  download:function(){
    wx.showLoading({
      title: '正在下載...',
    })
    wx.downloadFile({
      url: 'http://192.168.0.143:8080/mock/2021%E5%B9%B4%E5%85%AC%E5%8F%B8%E6%98%A5%E8%8A%82%E6%94%BE%E5%81%87%E8%B0%83%E4%BC%91%E9%80%9A%E7%9F%A5.pdf',
      filePath: wx.env.USER_DATA_PATH + '/2021年公司春節放假調休通知.pdf',
      success: function(res) {
        wx.openDocument({
          filePath: res.filePath,
          success: function (res) {
            wx.hideLoading()
            console.log('打開文檔成功')
          }
        })
      },fail: function(res){
        console.log(res)
      }
    })
  },

如果是用uniapp

uni.downloadFile({
	url: xxx.pdf',
	success: function (res) {
	var filePath = res.tempFilePath;
	uni.openDocument({
		filePath: filePath,
		success: function (res) {
		console.log('打開文檔成功');
		}
	});
  }
});