你知道Deferred和递归次数限制吗？下面有个不错的实例，大家可以看看

function runAsyncTTS(text,speecher,audiopath) {

var def = jQuery.Deferred();

var args = {"SynthText": text, "VoiceSpeecher": speecher, "WordSpeed": "3", "UseCSSML": "0", "AudioPath": audiopath};

tts.asyncTTS(JSON.stringify(args),function(err,result) {

def.resolve(result);

});

return def.promise();

}

function textToSpeechBat(metaJson, speecher, audioPath) {

var def = $.Deferred();

var result = {originalWords:"", resultJsonArr:[]};

var jsons="";

for(var index=0;index < metaJson.words.length;index++) {

var audioName = metaJson.words[index]['audio'];

audioName = audioName.replace('.mp3','');

var audioFile = audioPath +"/" + audioName + '.wav';

var args = '{"SynthText": "'+metaJson.words[index]['word']+'", "VoiceSpeecher": "'+speecher+'", "WordSpeed": "3", "UseCSSML": "0", "AudioPath": "'+audioFile+'"}';

jsons += args + "|";

}

jsons = jsons.substr(0,jsons.length-1);

tts.asyncTTSBat(jsons,function(err,ret) {

result['resultJsonArr'] = ret.split('|');

def.resolve(result);

});

return def.promise();

}

function textToSpeechWithTryTimes(metaJson, speecher, audioPath,times) {

var def = $.Deferred();

var ttsRet = null;

var ttsCallBack = function(index) {

if(index < times) {

textToSpeechBat(metaJson,speecher,audioPath).done(function (ret) {

console.log("textToSpeechWithTryTimes:"+JSON.stringify(ret));

ttsRet = ret;

var resultJsonArr = ret.resultJsonArr;

var audioFlag = true;

for(var i=0;i<resultJsonArr.length;i++) {

if(resultJsonArr[i] == "") {

audioFlag = false;

break;

}

var retObj = JSON.parse(resultJsonArr[i]);

console.log(retObj['audioFlag']);

if(retObj['audioFlag'] == 'false' || retObj['result']=="") {

audioFlag = false;

break;

}

}

console.log(audioFlag);

if(audioFlag == false) {

console.log("textToSpeechWithTryTimes Fail, try again!");

ttsCallBack(++index);

}else {

console.log("textToSpeechWithTryTimes succeed,return");

def.resolve(ret);

}

});

}

if(index == times) {

console.log("textToSpeechWithTryTimes timesover,return");

def.resolve(ttsRet);

}

};

ttsCallBack(0);

return def.promise();

}

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