小程序如何防止网络操作延迟导致无法获取数据

Question

小程序网络请求异步，如何防止网络操作延迟导致无法获取数据？例如官方quikStart项目demo中的有没有简单易用的解决方法？

Answer 1

var Callback = function(keys, callback) {&nbsp; &nbsp; keys = [].concat(keys);&nbsp; &nbsp; var value;&nbsp; &nbsp; this.value = function(v) {&nbsp; &nbsp; &nbsp; &nbsp; if (v === undefined) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return value;&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; value = v;&nbsp; &nbsp; };&nbsp; &nbsp; this.emit = function(key) {&nbsp; &nbsp; &nbsp; &nbsp; var i = keys.indexOf(key);&nbsp; &nbsp; &nbsp; &nbsp; if (i>=0) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; keys.splice(i, 1);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (keys.length<=0) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; callback(value);&nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; };};var c= new Callback(['test1', 'test2'], console.log);setTimeout(function() {&nbsp; &nbsp; c.value(1);&nbsp; &nbsp; c.emit('test1');},100);setTimeout(function() {&nbsp; &nbsp; c.emit('test2');},101);

Answer 2

异步过程，使用回调。getUserInfo的success里面有回调，回调数据是data，只需要将对data的处理放到success回调里面即可。如果对data的处理需要异步，则构造一个dataProduce函数，并设置回调，继而通过回调完成dataProduce。