我有一些问题的画廊管理组件,您可以添加/删除图片。
这是库处理程序的html代码:
<img src = '{{snapshot}}' >
<div class = 'md-button l3' is-file ng-model = 'picture' blob-url = 'snapshot'>Upload</div>
<div class = 'md-button l3' ng-click = 'article.pictures.push(picture)'>Add</div>
<div gallery-manager = 'article.pictures'></div>以下是指令:
.directive("galleryManager", function($compile){
var controllerFn = function($scope, $element, $attrs){
var self = this;
self.removeItemAt = function($index){
self.pictures.splice($index, 1);
$compile($element)($scope); <--Note this
}
}
var linkFn = function($scope, $element, $attrs){
}
return {
template:"<div gallery-item = 'picture' ng-repeat = 'picture in galleryManagerCtrl.pictures track by $index'></div>",
restrict:"A",
controller:controllerFn,
controllerAs:"galleryManagerCtrl",
bindToController:{
pictures:"=galleryManager",
}
}
})
.directive("galleryItem", function(FileService){
var linkFn = function($scope, $element, $attrs, galleryManagerCtrl){
$scope.galleryItemCtrl.galleryManagerCtrl = galleryManagerCtrl;
}
var controllerFn = function($scope, $element, $attrs){
var self = this;
if ( self.item instanceof File ){
FileService.buildBlobUrl(self.item).then(function(blobUrl){
self.thumb = blobUrl;
})
}
}
return{
template:"<img src = '{{galleryItemCtrl.thumb}}'>"+
"<a class = 'delete' ng-click = 'galleryItemCtrl.galleryManagerCtrl.removeItemAt($index)'>×</span></a>",
restrict:"A",
require:"^galleryManager",
link:linkFn,
controller:controllerFn,
bindToController:{
item:"=galleryItem",
},
controllerAs:"galleryItemCtrl"
}
})现在,该指令在添加元素时运行良好,但在删除项时会出现问题;在使用:$compile($element)($scope)之前,删除后的图片库中的最后一项总是会被删除,尽管图片数组删除了正确的项,所以我在删除项后添加了$compile行。
问题是,尽管库现在做了我想做的事情,但是它在编译后一直抛出一个错误(发布完整的跟踪,也许它可以帮助某人):
angular.js:13920 TypeError: Cannot read property 'insertBefore' of null
at after (http://localhost/www/project/admin/bower_components/angular/angular.js:3644:13)
at JQLite.(anonymous function) [as after] (http://localhost/www/project/admin/bower_components/angular/angular.js:3728:17)
at domInsert (http://localhost/www/project/admin/bower_components/angular/angular.js:5282:35)
at Object.move (http://localhost/www/project/admin/bower_components/angular/angular.js:5488:9)
at ngRepeatAction (http://localhost/www/project/admin/bower_components/angular/angular.js:29865:26)
at $watchCollectionAction (http://localhost/www/project/admin/bower_components/angular/angular.js:17385:13)
at Scope.$digest (http://localhost/www/project/admin/bower_components/angular/angular.js:17524:23)
at ChildScope.$apply (http://localhost/www/project/admin/bower_components/angular/angular.js:17790:24)
at HTMLAnchorElement.<anonymous> (http://localhost/www/project/admin/bower_components/angular/angular.js:25890:23)
at defaultHandlerWrapper (http://localhost/www/project/admin/bower_components/angular/angular.js:3497:11)这似乎来自watchCollection at ngRepeatDirective。
我有一种感觉,我错过了一些基本的东西,但无法看到什么是现在,所以,这里,我来问一下,然后再深入研究角度代码。
提前谢谢你。
编辑
添加了一个工作示例:http://codepen.io/sergio0983/pen/rMEMoJ?editors=1010
编辑2
将$compile从工作样本中删除,它可以工作,是的,但会抛出错误;此外,我认为真正的问题在其他地方。在工作示例中,可以看到删除项时文件名是如何更新的,但是图片保持了原来的顺序。
发布于 2016-10-29 22:02:39
addPicture()函数添加到mainController中(这将在图片对象中添加常量唯一ID ):
.controller("mainController",函数($scope){ $scope.article ={$scope.article:[] };$scope.addPicture =函数addPicture (图片){ //设置唯一ID picture.id = $scope.article.pictures.length;$scope.article.pictures.push(图片);};})track by picture.idremoveItemAt()函数,(此处不需要$compile):
self.removeItemAt =函数removeItemAt ( id ) { //查找具有给定id = self.pictures.findIndex((item) => item.id === id)的图片的索引;self.pictures.splice(id,1);}
改进型代码:http://codepen.io/anon/pen/mrZOre?editors=1010https://stackoverflow.com/questions/40322978
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