Ext--detailed explanation of delayed loading examples

Everyone should have encountered the following situations when using extjs under multi-threading:

Delayed loading of images is a commonly used technology in APP. The image will first generate a preview image, and wait until the original image After the download is complete, replace it.

When rendering several components at the same time, if the content of the component is dynamically read, sometimes the content of the subsequent components does not appear in the correct rendering order. For example, two forms are rendered at the same time. The fields of the form are obtained dynamically, and the result is form2. fields in The fields of form1 are overwritten. This situation is due to the fact that extjs is an asynchronous operation, and all loads are accessed at the same time. There are many ways to avoid this problem, here is one: extjs Lazy loading task

The following is the task code:

//创建延迟加载对象
var task = new Ext.util.DelayedTask(function(){
    //这里放置要延迟加载的代码段
    getActNameChanged();
    //alert("延迟加载");
});
//调用延迟加载对象的delay方法执行  参数为毫秒 本示例延迟0.1秒执行
task.delay(100);

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