异步请使用Promise

function getNewDate(flyNum)

{

return new Promise(function(resolve,reject)

{

$.ajax(

{

url: '',

type: 'GET',

dataType: 'json',

async: true,

data:

{

param1: flyNum

},

})

.done(function(res)

{

var thisDate = res.data.date; //需要返回thisDate

resolve(thisDate);

})

.fail(function(err)

{

//console.log("error");

reject(err);

})

.always(function()

{

});

});

}

getNewDate(123).then(function(resolveData)

{

//code....

console.log('resolveData',resolveData);

},function(rejectData)

{

console.log('rejectData',rejectData);

});