我有一系列电子邮件（作为更大模型的一部分）。这些显示在单独的行中，每个行都有一个删除按钮（地址本身可以直接在输入框中更新）。不幸的是，当使用地图函数渲染输入时，我不知道如何在反应中做到这一点。
（我正在将流星火焰项目转换为流星反应）。
一切都会呈现，但如何附加到更改事件以便我可以更新我的电子邮件数组？ onChange + value 需要以某种方式设置。
这是地图功能
return this.data.emailGroup.emails.map((email) => {
return (
<div key={email} className="input-group">
<input type="text" className="form-control" onChange={self.handleEmailListChange} value={email}/>
<div className="input-group-btn">
<button type="button"
className="btn btn-default remove-email"><span
className="glyphicon glyphicon-remove"></span></button>
</div>
</div>
);
});
初始状态（用数据库中的数据填充：
getInitialState() {
return {
name : '',
description: '',
emails : [],
newEmailAddress : ''
}
},
根据请求，这里是渲染方法（它需要 getContent 方法。 getcontent 方法之所以存在，是因为在流星中我需要等待数据，所以同时我需要一个加载状态。
getContent() {
return (
<div className="box box-success">
<div className="box-header with-border">
<h3 className="box-title">List of emails</h3>
</div>
<form role="form" className="form-horizontal">
<div className="box-body">
<p>Below is a list of email addresses which are added to this email group. If
you
want
to add more
you can add them one by one by inputting in the box below or add a list into
the
same box (email
addresses have to be seperated by either a space or ;) then press Add to add
to
the
list. You can edit
the addresses directly as well as remove them.</p>
<div className="input-group">
<input type="text" className="form-control"
value={this.state.newEmailAddress}
onChange={this.handleAddNewEmail}
placeholder="Email addresses seperated by a space or a semicolon ; i.e. [email protected] /cdn-cgi/l/email-protection;[email protected] /cdn-cgi/l/email-protection"/>
<span className="input-group-btn">
<button type="button" onClick={this.handleAddNewEmailButton} className="btn btn-info btn-flat add-email">Add</button>
</span>
</div>
<br/>
{this.renderEmail()}
</div>
</form>
</div>
)
},
render()
{
var contentStyle = {
minHeight : '946px'
};
return (
<div className="content-wrapper" style={contentStyle}>
<section className="content-header">
<h1>
{this.data.emailGroup? this.data.emailGroup.name : 'hello'}
</h1>
<small> Created by: Christian Klinton</small>
<br/>
<small> Last updated by: Christian Klinton - 2015-11-12 08:10:11</small>
<ol className="breadcrumb">
<li><a href="/emailGroups"><i className="fa fa-dashboard"></i> Home</a></li>
<li><a href="/emailGroups">Email groups</a></li>
<li className="active">{this.data.emailGroup? this.data.emailGroup.name : 'loading'}</li>
</ol>
</section>
<section className="content">
<div className="row">
<div className="col-md-6">
<div className="box box-primary">
<div className="box-header with-border">
<h3 className="box-title">Information</h3>
</div>
<form role="form">
<div className="box-body">
<div className="form-group">
<label htmlFor="inputName">Name</label>
<input type="email" className="form-control" id="name"
onChange={this.handleNameChange}
placeholder="Set the name of the email group" autoComplete="off"
value={this.state.name}/>
</div>
<div className="form-group">
<label>Description</label>
<textarea className="form-control" rows="3" id="description"
placeholder="Enter a description what and how the template is used..."
onChange={this.handleDesriptionChange}
value={this.state.description}
></textarea>
</div>
</div>
</form>
</div>
</div>
<div className="col-md-6">
{this.data.emailGroup? this.getContent() : <p>Loading</p> }
</div>
<div className="form-group">
<div className="col-sm-offset-8 col-sm-4">
<div className="pull-right">
<button className="btn btn-primary">Delete all</button>
<button className="btn btn-primary save">Save</button>
</div>
</div>
</div>
</div>
</section>
</div>
)
}
React 要求渲染数组中的每个元素都有唯一的东西，它被称为key，它是一个属性。
如果您不知道要为键分配什么，只需为其分配数组的索引：
this.props.doors.map((door, index) => (
<div key={index} className="door"></div>
));
这是适用于您的问题的相同解决方案：
return this.data.emailGroup.emails.map((email, index) => {
return (
<div key={index} className="input-group">
<input type="text"
className="form-control"
onChange={self.handleEmailListChange.bind(this, index)} value={email}/>
</div>
);
});
注意我是如何绑定的handleEmailListChange接收修改后的电子邮件的索引。如果handleEmailListChange接受索引，它可以更新状态内修改的电子邮件：
handleEmailListChange: function(index, event) {
var emails = this.state.emails.slice(); // Make a copy of the emails first.
emails[index] = event.target.value; // Update it with the modified email.
this.setState({emails: emails}); // Update the state.
}
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