标签:turn bsp name 请求 调用 class count pre 构造函数
export default class HelloLoading{ constructor(collection_name,db){ this.collection_name = collection_name this.db = db this.setPageCount(db) } pageCount = 0;
setPageCount(db){ db.collection(this.collection_name).count({ success:function(res){ // console.log(res.total) this.pageCount = res.total }, fail: console.error }) }
getPageCount(){ return this.pageCount } }
如上,当请求getPageCount() 的时候,构造函数的setPageCount还没有执行结束呢!怎么办?
回调函数!
export default class HelloLoading{ static pageCount = 0; constructor(collection_name){ this.collection_name = collection_name this.db = wx.cloud.database() } setPageCount(callback){ this.db.collection(this.collection_name).count({ success:function(res){ console.log(res.total) HelloLoading.pageCount = res.total callback() }, fail: console.error }) } getPageCount(){ return HelloLoading.pageCount; } }
外部调用的时候,使用
loadingdata.setPageCount(function(){ console.log(loadingdata.getPageCount()) })
标签:turn bsp name 请求 调用 class count pre 构造函数
原文地址:https://www.cnblogs.com/xixiaohui/p/12168141.html