微信小程序文件类API详解

wx.chooseImage({
  success: function(res) {
    var tempFilePaths = res.tempFilePaths
    wx.saveFile({
      tempFilePath: tempFilePaths[0],
      success: function(res) {
        var savedFilePath = res.savedFilePath
      }
    })
  }
})

wx.getSavedFileList({
  success: function(res) {
    console.log(res.fileList)
  }
})

wx.getSavedFileInfo({
  filePath: 'wxfile://somefile', //仅做示例用，非真正的文件路径
  success: function(res) {
    console.log(res.size)
    console.log(res.createTime)
  }
})

wx.getSavedFileList({
  success: function(res) {
    if (res.fileList.length > 0){
      wx.removeSavedFile({
        filePath: res.fileList[0].filePath,
        complete: function(res) {
          console.log(res)
        }
      })
    }
  }
})

wx.downloadFile({
  url: 'http://example.com/somefile.pdf',
  success: function (res) {
    var filePath = res.tempFilePath
    wx.openDocument({
      filePath: filePath,
      success: function (res) {
        console.log('打开文档成功')
      }
    })
  }
})

<view class="container">
	<button type="primary" bindtap="upload">上传文件</button>
	<text>文件的路径：{{ path}}px</text>
	<text>文件大小：{{filesize}}</text>
</view>

//获取应用实例
var app = getApp()
Page({
  	data:{
    	path:'',
    	filesize:0,
 	},
  	upload:function(){
	    var that=this
	    wx.chooseImage({
	        count: 1, 
	        sizeType: ['original', 'compressed'],// 可以指定是原图还是压缩图，默认二者都有 
	        sourceType: ['album', 'camera'],  // 可以指定来源是相册还是相机，默认二者都有
	        success: function (res) {
	            var tempFilePaths = res.tempFilePaths;
	            console.log(tempFilePaths)
	            wx.getSavedFileInfo({
				  	filePath:res.tempFilePaths[0], //仅做示例用，非真正的文件路径
				  	success: function(res) {
				  		that.setData({
					      	filesize:res.size,
					    })
				  	}
				})
	            that.setData({
	                path:tempFilePaths
	            })  
	        }
	    })
  	}
})

<view class="container">
	<button type="primary" bindtap="upload">打开文件</button>
</view>

//获取应用实例
var app = getApp()
Page({
  	data:{
    	path:'',
 	},
  	upload:function(){
	    var that=this
	    wx.downloadFile({
		  	url: 'http://192.168.56.1/sino-ui/www.941in.com.hk/m.v1/o.pptx',//文件的在本地的路径
		  	success: function (res) {
			    var filePath = res.tempFilePath
			    wx.openDocument({
			      	filePath: filePath,
			      	success: function (res) {
			        	console.log('打开文档成功')
			      	}
			    })
		  	}
		})
  	}
})