AngularJs 将 HTML 中每个 ng-repeat 的实例传递给指令 [英] AngularJs pass instance of each ng-repeat in HTML to directive
问题描述
我认为这应该很简单，但我遗漏了一些东西.如何将下面的 ng-repeat 中的 flowObj 传递给我的指令?我想将它传递给我的指令，然后在单击时使用该 FlowObj，然后应用一些逻辑.我尝试在指令中使用注释代码
范围:{测试:"@"}但这似乎搞砸了我的 CSS.
HTML:
<头><title></title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><身体><div id="center_outer"><div id="center_inner" ng-controller="CtrlPageFlow"><div flowclick class="cflow" ng-repeat="flowObj in flow">{{flowObj.name}}</html>
这是我的指令
angular.module('directives', ['opsimut']).directive('flowclick', function() {返回 {/*范围: {test:"@"//在指令的作用域上设置属性名称},*/链接:函数(范围，元素，属性){elem.bind('click', function(scope) {调试器；警报(范围.flowObj)；//scope.name += '!';//scope.$apply();});}};});基于答案的解决方案:
angular.module('directives', ['opsimut']).指令('流点击'，函数(){返回 {链接:函数(e，elem，attr){//scope 是指令的作用域，//elem 是指令根元素的 jquery lite(或 jquery full)对象.//attr 是指令元素上的属性字典.elem.bind('click', function(e1) {调试器；警报(e.flowObj)；}, e);}};});解决方案:从指令中删除整个 scope 属性，一切都应该按预期工作.>
另外:您需要从这一行重命名 scope 参数:
elem.bind('click', function(scope) {类似于:
elem.bind('click', function(e) {因为您在事件处理程序中使用相同的名称覆盖了对 scope 的访问.
解释:
ng-repeat 指令使其每个克隆都有自己的新范围.由于默认情况下元素上的指令共享范围，因此与 ng-repeat 一起放置的任何其他指令共享其范围并可以访问当前迭代的 $scope 变量.换句话说，您的自定义指令已经与 ng-repeat 共享范围，并且默认可以访问 flowObj.
在自定义指令上指定 scope 属性时它不起作用的原因是这导致指令具有自己的隔离范围，该范围不与 ng-repeat<共享/code> ，因此您无权访问克隆范围内的变量.
I'm thinking this should be simple but I'm missing something. How can I pass a flowObj in my ng-repeat below to my directive? I want to pass it to my directive then, on click, use that FlowObj, then apply some logic. I tried using the commented code in my directive
scope: {
test:"@"
}
But it seems to screw up my CSS.
HTML:
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<div id="center_outer">
<div id="center_inner" ng-controller="CtrlPageFlow">
<div flowclick class="cflow" ng-repeat="flowObj in flows">
{{flowObj.name}}
</div>
</div>
</div>
</body>
</html>
Here is my directive
angular.module('directives', ['opsimut']).directive('flowclick', function() {
return {
/*
scope: {
test:"@" // set the attribute name on the directive's scope
},
*/
link: function(scope, elem, attr) {
elem.bind('click', function(scope) {
debugger;
alert(scope.flowObj);
//scope.name += '!';
//scope.$apply();
});
}
};
});
SOLUTION BASED ON ANSWER:
angular.module('directives', ['opsimut']).
directive('flowclick', function() {
return {
link: function(e, elem, attr) {
// scope is the directive's scope,
// elem is a jquery lite (or jquery full) object for the directive root element.
// attr is a dictionary of attributes on the directive element.
elem.bind('click', function(e1) {
debugger;
alert(e.flowObj);
}, e);
}
};
});
SOLUTION: Remove the whole scope property from your directive and everything should work as expected.
ALSO:
You'll need to rename the scope argument from this line:
elem.bind('click', function(scope) {
to something like:
elem.bind('click', function(e) {
because you are overwriting access to scope in your event handler by using the same name.
EXPLANATION:
The ng-repeat directive causes each of its clones to have their own new scope. Since directives on an element share scope by default, any other directives placed alongside the ng-repeat share its scope and have access to the current iteration's $scope variables. In other words, your custom directive already shares scope with ng-repeat and has access to flowObj by default.
The reason it didn't work when specifying a scope property on your custom directive is that this caused the directive to have its own isolate scope which did not share with ng-repeat and so you did not have access to variables on the clones' scopes.
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