角度2 +离子2：检测对象是否被修改 [英] Angular 2 + Ionic 2: Detect if an object was modified

问题描述

Q）如果我有一个带有大量属性的对象，所有属性都绑定到表单中的字段，那么当对象发生更改时如何捕获？

我不想在每个字段上放置（模糊）事件，因为页面已经很重，这可能会导致听众太多在页面上。

I don't want to put (blur) events on every field as the page is quite heavy already and this could lead to way too many listeners on the page.

例如

对象：

var person = {
    name: string,
    email: string,
    phone: string
};

表格：

<input [(ngModel)]="person.name" type="text" />
<input [(ngModel)]="person.email" type="text" />
<input [(ngModel)]="person.phone" type="text" />

推荐答案

您可以使用表单对象并检查表单已经改变了。

you can use a form object and check if the form has changed.

我知道最新版本的Angular2和Ionic2与新的Forms模块存在一些问题，但这是我的建议。

I know that there have been some issues with latest release of Angular2 and Ionic2 with the new Forms module, but that would be my suggestion.

https://angular.io/ docs / ts / latest / guide / forms.html

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