angularJS自定义指令

1.指令内容

myApp.directive('ngKeydown', function() {
    return {
        restrict: 'A',
        link: function(scope, elem, attrs) {
             // this next line will convert the string
             // function name into an actual function
             var functionToCall = scope.$eval(attrs.ngKeydown);
             //console.log(attrs.ngKeydown)
             elem.on('keydown', function(e){
                  functionToCall(e);
             });
        }
    };
});

2.指令的使用

 ng-keydown="keyUpNumber"
//$scope.keyUpNumber = function(){}