這是我找到的最適合我的解決方案 - 作爲AMD模塊。受到Underscore的啓發。
/**
* Service function that helps to avoid multiple calls
* of a function (typically save()) during angular digest process.
* $apply will be called after original function returns;
*/
define(['app'], function (app) {
app.factory('debounce', ['$timeout', function ($timeout) {
return function(fn){ // debounce fn
var nthCall = 0;
return function(){ // intercepting fn
var that = this;
var argz = arguments;
nthCall++;
var later = (function(version){
return function(){
if (version === nthCall){
return fn.apply(that, argz);
}
};
})(nthCall);
return $timeout(later,0, true);
};
};
}]);
});
/*************************/
//Use it like this:
$scope.$watch('order', function(newOrder){
$scope.orderRules.apply(newOrder); // changing properties on order
}, true);
$scope.$watch('order.valid', function(newOrder){
$scope.save(newOrder); //will be called multiple times while digested by angular
});
$scope.save = debounce(function(order){
// POST your order here ...$http....
// debounce() will make sure save() will be called only once
});
爲什麼你想檢查對象是髒的,因爲角會自動檢查它 – 2013-04-29 12:13:37
這些更改是因爲用戶與UI交互?還是有另一個原因? – 2013-04-29 12:20:40