目前,我的代码段的工作方式类似于发生错误时,它通过一条消息并在几秒钟后消失,我这样做了$timeout,即使成功响应,成功消息也会在几秒钟后出现并消失。但由于某些原因,我现在不需要这样。
$timeout
在这里,您可以查看我当前的摘录:
$http.post('http://127.0.0.1:8000/api/v1/contact/', $scope.formModel) .then(function(response) { $scope.successCallBack = 'You have successfully saved your contact'; $scope.formModel = {}; $timeout(function () { $scope.successCallBack = ''; }, 6000); }, function(response){ // Showing user exactly what error occurs var errorData = response.data $scope.errorCallBack = Object.values(errorData)[0][0]; $timeout(function () { $scope.errorCallBack = ''; }, 3000); });
在以上代码段中,如果我不使用,$timeout则成功和错误将并存。
例如:一个用户提交错误数据并得到错误消息,而在提交正确数据并获得成功消息后,此时屏幕上同时存在成功和错误消息,这很奇怪
我想要类似的内容,当成功消息出现时,它应该存在于屏幕上,如果以后再次出现错误消息,则成功消息应该消失并出现错误消息。
可选的:
在这里,您将了解如何在模板中使用:
<div class="alert alert-success" ng-if="successCallBack"> <p> {{ successCallBack }} </p> <strong>UserID :</strong>{{ userid }} <br> <strong> Name :</strong>{{ name }} <br> <strong> Email :</strong>{{ email }} <br> <strong> Phone :</strong>{{ phone }} <br> <a href="#!/crud" class="btn btn-primary">Show Me All Contacts</a> </div> <!--sucess div ended--> <div class="alert alert-danger" ng-if="errorCallBack"> <!--( Error div start )this div appear if any error occured during request--> <p>Oops! You can't save this contact !</p> <p> Cause, {{ errorCallBack }} </p> <strong>UserID :</strong>{{ userid }} <br> <strong> Name :</strong>{{ name }} <br> <strong> Email :</strong>{{ email }} <br> <strong> Phone :</strong>{{ phone }} <br> </div> <!--error div ended-->
希望你能遇到这个问题:
如果我不使用的$timeout话,成功和错误将并存。
响应和拒绝处理程序可以调用一个公共函数
$http.post('http://127.0.0.1:8000/api/v1/contact/', $scope.formModel) .then(function(response) { displayMessage("success",response); return response; }, function(response){ displayMessage("error",response); throw response; });
然后将通用代码放入通用函数中:
var timeoutId; function displayMessage(type,response) { var success = (type == "success"); $scope.messageClass = success ? "alert-success" : "alert-danger"; var messageDuration = success ? 6000 : 3000; if (success) { $scope.messageText = "Contact successfully saved."; } else if (response.status == 500) { $scope.messageTest = "Oops, Internal Server Error"; } else { $scope.messageText = "Oops, YOU DID SOMETHING WRONG!!!!"; }; //cancel previous timeout timeoutId && $timeout.cancel(timeoutId); timeoutId = $timeout(function() { $scope.messageText = ""; }, messageDuration); }
模板可以简化:
<div class="alert" ng-class="messageClass" ng-show="messageText"> <p> {{ messageText }} </p> <strong>UserID :</strong>{{ userid }} <br> <strong> Name :</strong>{{ name }} <br> <strong> Email :</strong>{{ email }} <br> <strong> Phone :</strong>{{ phone }} <br> <a href="#!/crud" class="btn btn-primary">Show Me All Contacts</a> </div>