所以我有一个情况,我有多个未知长度的承诺链。我想要一些操作运行时,所有的CHAINS已经处理。这是可能吗?这里是一个例子:
app.controller('MainCtrl',function($scope,$q,$timeout) { var one = $q.defer(); var two = $q.defer(); var three = $q.defer(); var all = $q.all([one.promise,two.promise,three.promise]); all.then(allSuccess); function success(data) { console.log(data); return data + "Chained"; } function allSuccess(){ console.log("ALL PROMISES RESOLVED") } one.promise.then(success).then(success); two.promise.then(success); three.promise.then(success).then(success).then(success); $timeout(function () { one.resolve("one done"); },Math.random() * 1000); $timeout(function () { two.resolve("two done"); },Math.random() * 1000); $timeout(function () { three.resolve("three done"); },Math.random() * 1000); });
在这个例子中,我为promise 1,2和3设置了一个$ q.all(),它将在随机的时间得到解决。然后我将promise添加到一和三的结尾。我想要所有的链解决后,所有的链解决。这里是我运行这段代码时的输出:
one done one doneChained two done three done ALL PROMISES RESOLVED three doneChained three doneChainedChained
有没有办法等待链解决?
I want the all to resolve when all the chains have been resolved.
当然,然后只是通过每个链的承诺到all(),而不是初始的承诺:
$q.all([one.promise,three.promise]).then(function() { console.log("ALL INITIAL PROMISES RESOLVED"); }); var onechain = one.promise.then(success).then(success),twochain = two.promise.then(success),threechain = three.promise.then(success).then(success).then(success); $q.all([onechain,twochain,threechain]).then(function() { console.log("ALL PROMISES RESOLVED"); });