使用js的XMLHttpRequest对象，在ios中获取服务器上的txt，经常失败...

Z时代
2024-01-10
分类：IT

但是在pc上还没发现过失败，ios上失败时候的症状是，XMLHttpRequest.readyState到2之后就没有东西了。

以下是代码

ajax('/video/music20/0music_list.txt',function(data){
        if(!data)alert('音乐列表加载失败');
});
function ajax(url,options){
    var req = new XMLHttpRequest(),
        complete = options.complete||options,
        method = options.method||"POST",
        dataFormat = options.dataFormat||'JSON',
        cache = options.cache||true,
        args = options.args||'';
    var url = url+(cache?'':((url.indexOf('?')>=0?'&':'?')+"random="+Math.random()));
    if(complete){
        req.onreadystatechange = function(){
            if (req.readyState==4 && (req.status==200||req.status==304)){
                complete(req.responseText);
            }else if(req.readyState==0){
                alert(req.status);
            }else if(req.readyState==1){
                alert(req.readyState,req.status);
            }else if(req.readyState==2){
                alert(req.readyState,req.status);
            }else if(req.readyState==3){
                alert(req.readyState,req.status);
            }
        }
    }
    req.open(method,url,true);
    req.send(argString);
}