的两种方法可以做到这一点是
1.如果反应不依赖于彼此
var req1 = $.getJSON(...).then(function(response1) {
//evaluate the response and either reject or resolve a Deferred based on the results of your evaluation
if(!response1) { return $.Deferred().reject(); }
return $.Deferred().resolve(response1);
});
var req2 = $.getJSON(...).then(function(response2) {
//evaluate the response
if(!response1) { return $.Deferred().reject(); }
return $.Deferred().resolve(response2);
});
var req3 = $.getJSON(...).then(function(response3) {
//evaluate the response
if(!response1) { return $.Deferred().reject(); }
return $.Deferred().resolve(response3);
});
var req4 = $.getJSON(...).then(function(response4) {
//evaluate the response
if(!response1) { return $.Deferred().reject(); }
return $.Deferred().resolve(response4);
});
$.when(req1,req2,req3,req4)
.then(
function(response1,response2,response3,response4) { /* called when all requests are successfully complete */ },
function() { /* called when any of the requests have failed */ }
);
2.如果响应DO互相依赖
$.getJSON(...) //req1
.then(function(response1) {
//evaluate response1
if(!response1) { return $.Deferred().reject(); }
return $.Deferred().resolve(response1);
})
.then(function(response1) {
return $.getJSON(...).then(function(response2) {
//evaluate the response
if(!response2) { return $.Deferred().reject(); }
return $.Deferred().resolve(response1,response2);
});
})
.then(function(response1,response2) {
return $.getJSON(...).then(function(response3) {
//evaluate the response
if(!response2) { return $.Deferred().reject(); }
return $.Deferred().resolve(response1,response2,response3);
});
})
.then(function(response1,response2,response3) {
return $.getJSON(...).then(function(response4) {
//evaluate the response
if(!response4) { return $.Deferred().reject(); }
return $.Deferred().resolve(response1,response2,response3,response4);
});
})
.then(
function(response1,response2,response3,response4) {
//only called on success of all requests
},
function() {
//called on failure of any individual request, or if the responses of any individual request did not meet your conditions
}
)
编辑
如果你在一个函数执行这些,那么你只需要返回的承诺,并将其链接到受.then
像这样:
function makeReqs() {
//method 1
return $.when(req1,req2,req3,req4);
//method 2
return $.getJSON(...)
.then(...)
.then(...)
.then(...)
}
//call the function
makeReqs
.then(
function() { /* this is called on success */ },
function() { /* this is called on failure */ }
)
.pipe已被弃用的jQuery 1.8 – peinearydevelopment 2015-04-02 18:05:27
@peinearydevelopment的 - 感谢,我最近一直在使用旧版本。应该使用'$ .then'我会编辑。 – Adam 2015-04-02 18:06:35
谢谢,但我如何触发成功或失败的功能? – MahmoudKsemtini 2015-04-02 18:06:48