Javascript 如何使用AngularJS ui date指令格式化初始日期值?
当我从服务器获取模型时,它如下所示:Javascript 如何使用AngularJS ui date指令格式化初始日期值?,javascript,angularjs,jquery-ui,angularjs-directive,angular-ui,Javascript,Angularjs,Jquery Ui,Angularjs Directive,Angular Ui,当我从服务器获取模型时,它如下所示: $scope.m = { name: "John", Dt: "2013-10-03T18:47:33.5049087-07:00" }; $http.get('data.json').success(function(data) { data.date = Date.parse(data.date); $scope.model = data; } 视图看起来像: <input title="Date" ui-da
$scope.m =
{
name: "John",
Dt: "2013-10-03T18:47:33.5049087-07:00"
};
$http.get('data.json').success(function(data) {
data.date = Date.parse(data.date);
$scope.model = data;
}
视图看起来像:
<input title="Date" ui-date ng-model="m.Dt" />
但输入的初始值保持为“2013-10-03T18:47:33.5049087-07:00”。如果我使用日期选择器更改日期,它的格式仅为mm dd yy
如何将初始值也设置为
mm-dd-yy
格式?您的$scope.m.Dt属性应为日期类型,而不是字符串
$scope.m =
{
name: "John",
Dt: new Date()
};
要设置日期格式,请使用ui-date-format指令,如:
<input title="Date" ui-date ui-date-format="mm-dd-yy" ng-model="m.Dt" />
请参阅自述文件中的示例:问题在于“日期”只是一个字符串,它需要一个本机日期对象(或时间戳)
我找到了两种处理方法:立即清除数据,或者观察变量并重新指定其类型
我的首选解决方案是在数据被引入时咀嚼数据。因为我知道对象有一个日期
,所以我只需从$http
成功
承诺中删除JSON数据,如下所示:
$scope.m =
{
name: "John",
Dt: "2013-10-03T18:47:33.5049087-07:00"
};
$http.get('data.json').success(function(data) {
data.date = Date.parse(data.date);
$scope.model = data;
}
在将数据分配给$scope
之前对其进行转换,以便Angular将$scope.model.date
视为本机JS日期对象,并正确格式化它
另一种解决方案是专门$watch
变量的类型。在控制器的某个位置,添加以下内容:
$scope.$watch('model.date', function() {
if (typeof $scope.model.date === 'string') {
$scope.model.date = Date.parse($scope.model.date);
}
});
每次修改
$scope.model.date
时检查类型。显然,这会增加开销,但在某些情况下可能会有用 我也有同样的问题。下面是我在Angularjs中使用Jquery UI日历所做的
日期格式为“2015-03-24T04:00:00”
首先修剪日期字符串以仅获取年、月和日期
var date = "2015-03-24T04:00:00"
var formattedDate = date.match(/[\d-]+/).pop();
// formattedDate is now "2015-03-24" which is passed into
// the directive below as the input.$modelValue.
现在,在指令或控制器中执行以下操作
// Here is directive example.
link: function( scope, element, attrs, input ){
element.datepicker( optionsObjectHere );
setInitialDateFormatOnInput();
function setInitialDateFormatOnInput(){
setTimeout(function(){ // This timeout is required to delay the directive for the input.modelValue to resolve, however, no actual delay occurs!
element.datepicker( "setDate", formatToJqueryUIDateFormat());
});
}
function formatToJqueryUIDateFormat(){
return $.datepicker.parseDate( 'yy-mm-dd', input.$modelValue );
// 'yy-mm-dd' needs to match the input.$modelValue format from above.
}
} // link
这就是我在输入上使用整个jquery UI的方式
HTML
指示
app.directive('myCalendarPopup', function(){
var defaultOptions = { minDate: 0, buttonImage: "calendar-icon.png", buttonImageOnly: 'true', showOn: "both", dateFormat: "MM d, yy" };
// defaultOptions just in case someone doesn't pass in options.
return {
require:'?ngModel',
restrict: 'A',
link: function( scope, element, attrs, input ){
if ( !input ){ return; } // If no ngModel then return;
element.datepicker( createCalendarOptions());
setInitialDateFormatOnInput();
function createCalendarOptions(){
if( !attrs.rsCalendarPopup ){ return addRequiredJqueryFunction( defaultOptions );}
return formatOptions();
}
function formatOptions() {
var options = scope.$eval( attrs.rsCalendarPopup );
// Turn string into object above.
return addRequiredJqueryFunction( options );
}
function addRequiredJqueryFunction( options ){
options.onSelect = changeDate;
// add onSelect to passed in object and reference local changeDate function, which will update changes to input.$modelValue.
return options;
}
function changeDate( date ){
input.$setViewValue( date );
}
function setInitialDateFormatOnInput(){
setTimeout(function(){
// This timeout is required to delay the directive for the input.modelValue to resolve.
// However, there is no actual timeout time. This is a must to get
// Angular to behave.
element.datepicker( "setDate", formatToJqueryUIDateFormat());
});
}
function formatToJqueryUIDateFormat(){
return $.datepicker.parseDate( 'yy-mm-dd', input.$modelValue );
// 'yy-mm-dd' is not the format you want the calendar to be
// it is the format the original date shows up as.
// you set your actual formatting using the calendar options at
// the top of this directive or inside the passed in options.
// The key is called dateFormat, in this case it's set as
// dateFormat: "MM d, yy" which makes June 30, 2015.
}
} // link
} // return
});
注意:我只能在它显示的配置中工作。我已将其添加到控制器,甚至是指令控制器,无法重新创建初始日期条件。我还不知道为什么会这样。也许这个解决方案只在嵌入到另一个独立的scope指令中的link函数中起作用,并且由于特定的定时而起作用
是的,我知道它适用于日期对象,但在一个真实的示例中,您的数据可能通过JSON来自服务器,并且您的日期将不是对象,而是字符串。我可以编写一个通过模型递归并将日期字符串转换为对象的方法,但我认为对于这样一个常见的场景,它已经被处理了。它不是以angular方式处理的,但您可以使用递归方法创建http拦截器,以将日期字符串转换为您提到的对象。例如,请参阅此帖子:
app.directive('myCalendarPopup', function(){
var defaultOptions = { minDate: 0, buttonImage: "calendar-icon.png", buttonImageOnly: 'true', showOn: "both", dateFormat: "MM d, yy" };
// defaultOptions just in case someone doesn't pass in options.
return {
require:'?ngModel',
restrict: 'A',
link: function( scope, element, attrs, input ){
if ( !input ){ return; } // If no ngModel then return;
element.datepicker( createCalendarOptions());
setInitialDateFormatOnInput();
function createCalendarOptions(){
if( !attrs.rsCalendarPopup ){ return addRequiredJqueryFunction( defaultOptions );}
return formatOptions();
}
function formatOptions() {
var options = scope.$eval( attrs.rsCalendarPopup );
// Turn string into object above.
return addRequiredJqueryFunction( options );
}
function addRequiredJqueryFunction( options ){
options.onSelect = changeDate;
// add onSelect to passed in object and reference local changeDate function, which will update changes to input.$modelValue.
return options;
}
function changeDate( date ){
input.$setViewValue( date );
}
function setInitialDateFormatOnInput(){
setTimeout(function(){
// This timeout is required to delay the directive for the input.modelValue to resolve.
// However, there is no actual timeout time. This is a must to get
// Angular to behave.
element.datepicker( "setDate", formatToJqueryUIDateFormat());
});
}
function formatToJqueryUIDateFormat(){
return $.datepicker.parseDate( 'yy-mm-dd', input.$modelValue );
// 'yy-mm-dd' is not the format you want the calendar to be
// it is the format the original date shows up as.
// you set your actual formatting using the calendar options at
// the top of this directive or inside the passed in options.
// The key is called dateFormat, in this case it's set as
// dateFormat: "MM d, yy" which makes June 30, 2015.
}
} // link
} // return
});