angularJS:如何调用子作用域功能父范围 [英] angularJS: How to call child scope function in parent scope
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问题描述
如何调用其父范围,子范围内定义的方法?
How can call a method defined in child scope from its parent scope?
function ParentCntl() {
// I want to call the $scope.get here
}
function ChildCntl($scope) {
$scope.get = function() {
return "LOL";
}
}
推荐答案
您可以使用 $广播
从父到子:
You can use $broadcast
from the parent to a child:
function ParentCntl($scope) {
$scope.msg = "";
$scope.get = function(){
$scope.$broadcast ('someEvent');
return $scope.msg;
}
}
function ChildCntl($scope) {
$scope.$on('someEvent', function(e) {
$scope.$parent.msg = $scope.get();
});
$scope.get = function(){
return "LOL";
}
}
工作小提琴: http://jsfiddle.net/wUPdW/2/
更新:还有另外一个版本,少耦合,更容易测试:
UPDATE: There is another version, less coupled and more testable:
function ParentCntl($scope) {
$scope.msg = "";
$scope.get = function(){
$scope.$broadcast ('someEvent');
return $scope.msg;
}
$scope.$on('pingBack', function(e,data) {
$scope.msg = data;
});
}
function ChildCntl($scope) {
$scope.$on('someEvent', function(e) {
$scope.$emit("pingBack", $scope.get());
});
$scope.get = function(){
return "LOL";
}
}
小提琴: http://jsfiddle.net/uypo360u/
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