我在AngularJS中有这个确认需要两个回调:一个是用户点击是,另一个是用户点击对话框上的否。
我需要先询问用户是否完成了操作,如果他回答是,我还需要询问他是否要将用户添加为管理员。无论对这两个问题的回答如何,我都需要保留数据。
所以我有这个可怕的,回调地狱出没的代码来处理我上面提到的分支:
$scope.promptAndSave = function() {
// first question
$scope.confirmation.display("Confirmation", "Did you finish working on this Reference Check?", function() {
// handles Yes for first question
$scope.referenceCheck.finished = true;
var manager_name = $scope.referenceCheck.first_name + " " + $scope.referenceCheck.last_name;
$scope.confirmation.display("Add new Manager", "Do you want to add <b>" + manager_name + "</b> as a new manager to your database?", function() {
// handles Yes for second question
$scope.referenceCheck.add_manager = true;
$scope.saveReferenceCheck();
}, function() {
// handles No for second question
$scope.saveReferenceCheck();
});
}, function() {
// handles No for first question
$scope.saveReferenceCheck();
});
};
这是否可以使用promises解决?或者其他更通用的JS技术是否更适合这种情况?
我理解AngularJS提供$ q,这会有帮助吗?转换为promises时,上面的代码会如何显示?
修改
因此确认是我$scope
上的本地对象,如下所示:
$scope.confirmation = {
visible: false,
title: "",
prompt: "",
yes: function() {
this.visible = false;
this.yesHandler();
},
no: function() {
this.visible = false;
this.noHandler();
},
display: function(title, prompt, yesHandler, noHandler) {
this.title = title;
this.prompt = prompt;
this.yesHandler = yesHandler;
this.noHandler = noHandler;
this.visible = true;
}
};
我有模板HTML代码,它与对象交互以显示提示符:
<div id="confirmationForm" ng-show="confirmation.visible">
<div class="form-title">{{ confirmation.title }}</div>
<div class="form-body">
<div class="message" ng-bind-html-unsafe="confirmation.prompt"></div>
<div class="actions">
<span>
<button ng-click="confirmation.yes()">Yes</button>
<button ng-click="confirmation.no()">No</button>
</span>
<img src="/assets/spinner.gif" ng-show="confirmation.busy">
</div>
</div>
</div>
编辑2
在一些帮助下,我设法将它们放在一起:http://jsfiddle.net/LJr5z/1/
编辑3
要完成,$ q不支持Angular 1.0.3中的finally
,所以这里是最后一个版本的JSFiddle,使用AngularJS 1.2 - http://jsfiddle.net/LJr5z/3/
答案 0 :(得分:5)
所以注入$q
并试试这个。
$scope.confirmation = {
visible: false,
title: "",
prompt: "",
yes: function() {
this.visible = false;
this.dfd.resolve();
},
no: function() {
this.visible = false;
this.dfd.reject();
},
display: function(title, prompt) {
this.dfd = $q.defer();
this.title = title;
this.prompt = prompt;
this.visible = true;
return this.dfd.promise;
}
};
要打电话:
$scope.confirmation.display('title', 'prompt')
.then(function() {
// return another promise here, yes clicked
}, function() {
// no clicked
})
.then(...);