- 数据库获得数据
[图片] 请问我要怎么获取到result.data里面的score呢,data不是一个数组嘛,可是我用result.data[0].score显示0 是undefined,求助
2018-12-05 - 云函数更新数据库
云函数里面传入name和score,对数据库的score进行更改,显示函数调用成功,但是内容没有发生改变 // 云函数入口文件 const cloud = require('wx-server-sdk') cloud.init() const db=cloud.database() // 云函数入口函数 exports.main = async (event, context) => { return await db.collection("user").doc(event.name).update({ data:{ score: event.score } }) } updateData(id){ wx.cloud.callFunction({ name:"update", data:{ name:id, score:databus.bestScore } }).then(res=>{ console.log(res) }).catch((e)=>{ console.log('e') }) }, [图片] 求大佬帮忙!!!!!!!!!
2018-12-04 - drawImage
const ctx=canvas.getContext('2d') ctx.drawImage(databus.resources.images[this.img],this.x,this.y,this.width,this.height); 发生错误:Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The provided value is not of type '(CSSImageValue or HTMLImageElement or SVGImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap or OffscreenCanvas)'
2018-11-16 - addEventListener为null问题
let resource = null return new Promise((resolve,reject)=>{ resourcesList.forEach(resName => { if (resName.endsWith('.png')) { resource = new Image() resource.src = 'images/${resName}' } else if (resName.endsWith('.mp3')) { resource = new Audio() resource.src = 'audio/${resName}' } resource.addEventListener('load', () => { loadedCount++ } }) 显示TypeError: Cannot read property 'addEventListener' of null, 求大佬帮debug
2018-11-16