在控制器

Question

基本上，当用户提交对数据进行计算并将其存储在变量中时。当它在一个控制器中时，我有它工作，但现在我需要在页面之间拆分它。我想用一项服务来做这件事。正如你将看到的，我真的很困惑，我知道我基本上完全做错了。我不确定我在哪里误入歧途，或者我应该调查一下以更好地处理我的误解 - 任何帮助都非常感激。即使只是一个基本指针也不错：

.factory('meals', function() {
    var data = {
        basePrice: 0,
        taxRate: 0,
        tipPercentage: 0,
        mealCount: 0,
        tipTotal: 0,
        averageTip: 0,
        subtotal: 0,
        tip: 0,
        tipTotal: 0,
        total:0
    }
    function set(data) {
        savedData = data;
    }
    function get(){
        return savedData;
    }
    return {
        set: set,
        get: get
    }
})
.controller('HomeCtrl', [function(meals) {
}])
.controller('MealCtrl', [function(meals) {
    var ws = this;
    meals.set();
    ws.data = meals.get();

    ws.submit = function(){
        ws.tax_rate= ws.taxRate/100;
        ws.tip_rate= ws.tipPercentage/100;
        ws.subtotal= ws.basePrice*ws.tax_rate;
        ws.tip = ws.basePrice*ws.tip_rate;
        ws.total = ws.basePrice+ws.subtotal+ws.tip;
        ws.mealCount+=1;
        ws.tipTotal+=ws.tip;
        ws.averageTip=(ws.tipTotal+ws.tip)/ws.mealCount;
        items.tipTotal=ws.tipTotal;
        items.mealCount=ws.mealCount;
        items.averageTip=ws.averageTip;
    };

    ws.cancel = function(){
        ws.basePrice='';
        ws.taxRate='';
        ws.tipPercentage='';
    };

    ws.double = function(value){return value*2;};
}]).controller('EarningsCtrl', [function(meals) {

和HTML：

<h2>Enter the Meal Details</h2>

<form name="Calculator" ng-submit="ws.submit()">
    <p>Base Meal Price:</p>
    <input type="number" ng-model="ws.basePrice" required> <br>
    <p>Tax Rate: %</p>
    <input type="number" ng-model="ws.taxRate" required> <br>
    <p>Tip Percentage: %</p>
    <input type="number" ng-model="ws.tipPercentage" required> <br>
    <button>Submit</button>
</form>
<button ng-click="ws.cancel()">Cancel</button>

<h2>Customer Charges</h2>
    <p>Base Price {{ws.data.basePrice | currency}}</p>
    <p>Subtotal {{ws.subtotal | currency}}</p>
    <p>Tip {{ws.tip | currency}}</p>
    <p>Total {{ws.total | currency}}</p>