setTimeout(() => {       context.draw(true,()=>{         wx.canvasToTempFilePath({           x: 0,           y: 0,           width: 340,           height: 500,           destWidth: 680,           destHeight: 1000,           canvasId: 'share',           success: function (res) {             console.log(res.tempFilePath)             wx.saveImageToPhotosAlbum({               filePath: res.tempFilePath,               success: (res) => {                 console.log(res)                 that.setData({                   showModal: false                 })                 wx.hideToast({                   complete: (res) => {},                   fail: (res) => {},                   success: (res) => {},                 })               },               fail: (err) => {                 console.log(err)                 that.setData({                   showModal: false                 })                 wx.hideToast({                   complete: (res) => {},                   fail: (res) => {},                   success: (res) => {},                 })               }             })           },           fail: function (e) {             console.log(e)           }         })       });     }, 1000);   }, 这是运行代码 在开发工具上面能导出图片但是在真实手机上面就运行不起来