ExtJs的store默认是异步的，但有时候我们必须要发送同步请求才能满足需求，比如在多线程中，要实现同步很简单，只需继承Ext.data.proxy.Ajax，重写的同步类如下：
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Ext.define('Ext.ux.data.proxy.Ajax', { extend: 'Ext.data.proxy.Ajax', async:true, doRequest: function(operation, callback, scope) { var writer = this.getWriter(), request = this.buildRequest(operation); if (operation.allowWrite()) { request = writer.write(request); } Ext.apply(request, { async : this.async, binary : this.binary, headers : this.headers, timeout : this.timeout, scope : this, callback : this.createRequestCallback(request, operation, callback, scope), method : this.getMethod(request), disableCaching: false }); Ext.Ajax.request(request); return request; } }); |
使用的时候，只需修改代理即可,async：false表示同步，true为异步:
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proxy: Ext.create("Ext.ux.data.proxy.Ajax",{ async:false, url:" ", reader: { type: 'json', root: 'root' } }) |
from:https://my.oschina.net/wangdaoliang/blog/776567