NG-检查= QUOT;真＆QUOT;在复选框被忽略 [英] ng-checked="true" being ignored on checkbox

问题描述

我有一个复选框的选中状态（ NG-检查）是基于计算的特性（ NG-检查=someFunction（） ）。

I have a checkbox whose checked state (ng-checked) is based on a computed property (ng-checked="someFunction()").

例如起见，我们假设其检查的状态应始终检查，即： NG-检查=真

For the sake of example, let's assume its check state should always be checked, ie: ng-checked="true".

但是，单击该复选框会取消它，这意味着还有的 NG-检查申报和复选框的实际状态之间的脱节：

However, clicking on the checkbox will uncheck it, meaning there's a disconnect between the ng-checked declaration and the actual state of the checkbox:

<input type="checkbox" ng-checked="true">

那么，为什么点击复选框使其选中，如果 NG-检查始终是真的吗？

So why does clicking the checkbox make it unchecked if ng-checked is always true?

演示Plunkr这里

推荐答案

NG-检查不打算锁定复选框的值，它是一个单向绑定，更新的复选框，只有当财产与其绑定更新。你也不能绑定到原语（在这种情况下，一个布尔值），则必须绑定到一个对象的属性。

ng-checked is not intended to lock the value of a checkbox, it is a one way binding which updates the checkbox only when the property its bound to is updated. Also you can not bind to primitives (in this case a boolean value), you must bind to a property of an object.

如果要禁用此复选框，使用禁用=true属性。

If you want to disable this checkbox, use the disabled="true" attribute.

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