Angularjs ng-model 在 ng-if 中不起作用 - Angularjs ng-model doesn't work inside ng-if

問題：

Here is the fiddle showing the problem.這是顯示問題的小提琴。 http://jsfiddle.net/Erk4V/1/ http://jsfiddle.net/Erk4V/1/

It appears if I have an ng-model inside of an ng-if, the model does not work as expected.看來如果我在 ng-if 中有一個 ng-model，該模型不會按預期工作。

I am wondering if this is a bug or if I am misunderstanding the proper usage.我想知道這是一個錯誤還是我誤解了正確的用法。

<div ng-app >
    <div ng-controller="main">

        Test A: {{testa}}<br />
        Test B: {{testb}}<br />
        Test C: {{testc}}<br />

        <div>
            testa (without ng-if): <input type="checkbox" ng-model="testa" />
        </div>
        <div ng-if="!testa">
            testb (with ng-if): <input type="checkbox" ng-model="testb" />
        </div>
        <div ng-if="!someothervar">
            testc (with ng-if): <input type="checkbox" ng-model="testc" />
        </div>

    </div>
</div>

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解決方案：

參考一： https://en.stackoom.com/question/1ExpV
參考二： https://stackoom.com/question/1ExpV