时间:2023-02-10 10:12:51 | 栏目:AngularJS | 点击:次
引入主题背景:angular 的指令配置中的template可以直接使用硬编码写相应的代码,不过也可以根据变量,进行动态更新。那么需要用到那些变量,因用法的不同,所以需要设置合适的绑定策略。
1:先说指令域scope的@
我觉得描述很费劲,直接用代码来阐述:
AngularJS.html
<!doctype html> <html ng-app='myApp'> <head> </head> <body> <div ng-controller="listCtrl"> <input type="text" ng-model="t" /> <kid title="{{t}}" > //这个必须指定的,这里的title是指令里scope的@对应的,t就是控制域scope下的 <span>我的angularjs</span> </kid> </div> <script type="text/javascript" src="angular.js"></script> <script type="text/javascript" src="main05.js"></script> </body></html>
main05.js
var myApp=angular.module('myApp',[]); myApp.controller('listCtrl',function($scope){ $scope.logchore="motorola"; }); myApp.directive('kid',function(){ return { 'restrict':'E', scope:{ title:"@" }, template:'<div >{{title}}</div>' } });
在输入框输入数字会绑定到指令模板的title中。
2:再说说Scope的=
angularjs.html
<!doctype html> <html ng-app='myApp'> <head> </head> <body> <div ng-controller="listCtrl"> <input type="text" ng-model="t" /> <kid title="t" > //和上面相比,这个直接赋值等于scope域下的t了 <p>{{title}}</p> <span>我的angularjs</span> </kid> </div> <script type="text/javascript" src="angular.js"></script> <script type="text/javascript" src="main05.js"></script> </body></html>
main05.js代码如下:
var myApp=angular.module('myApp',[]); myApp.controller('listCtrl',function($scope){ $scope.logchore="motorola"; }); myApp.directive('kid',function(){ return { 'restrict':'E', scope:{ title:"=" }, template:'<div >{{title}}</div>' } });
3:最后说&,这个是用来方法调用的
angularjs.html代码如下:
<!doctype html> <html ng-app='myApp'> <head> </head> <body> <div ng-controller="listCtrl"> <kid flavor="logchore()" ></kid> //先比=,函数赋值的形式,而logchore函数必须是域scope下声明的函数 </div> <script type="text/javascript" src="angular.js"></script> <script type="text/javascript" src="main05.js"></script> </body></html>
main05.js代码如下:
var myApp=angular.module('myApp',[]); myApp.controller('listCtrl',function($scope){ $scope.logchore=function(){ alert('ok'); }; }); myApp.directive('kid',function(){ return { 'restrict':'E', scope:{ flavor:"&" }, template:'<div ><button ng-click="flavor()"></button></div>' } });
如果logchore带有参数,
angularjs.html代码如下:
<!doctype html> <html ng-app='myApp'> <head> </head> <body> <div ng-controller="listCtrl"> <kid flavor="logchore(t)" ></kid> </div> <script type="text/javascript" src="angular.js"></script> <script type="text/javascript" src="main05.js"></script> </body></html>
main05.js代码如下:
var myApp=angular.module('myApp',[]); myApp.controller('listCtrl',function($scope){ $scope.logchore=function(x){ alert(x); }; }); myApp.directive('kid',function(){ return { 'restrict':'E', scope:{ flavor:"&" }, template:'<div > <input type="text" ng-model="v" /> <button ng-click="flavor({t:v})"></button></div>' } });