我正在研究一个在线贷款申请示例,我需要做的是我用我拥有的值填充表格行,并且每行都有一个“extend”按钮,如果按下该按钮将更改值。我的问题是按钮是在循环中创建的,我不知道如何使它影响同样循环中也填充的值,所以总结一下我想要做的是例如当值为= 10时,如果我按下按钮,我想将其更改为20,这是我到目前为止所拥有的
export default class History extends React.Component {
constructor(props) {
super(props)
this.state = {
extended:false // refers to having the loan extended or not
};
}
/* change state variable on extend button press */
extend() {
this.setState({
extended: true
});
}
render() {
var items = this.props.loan;
var that = this;
var extendBtn = <a class="waves-effect waves-light btn small green lighten" onClick={that.extend.bind(that)}>Extend!</a>;
var itemslist = items.map( function(item, index) {
var value = item.moneyDue; // Money to be paid
var date = item.PayDay; // Date of payment
var days = item.daysNo; // Number of loan days
var extensionAmount = item.extension;
return(
<tr key={index}>
<td>{item.moneyBorrowed} Eur</td>
<td>{days}</td>
<td>{value} Eur</td>
<td>{date}<span>{extendBtn}</span></td>
</tr>
);
})
return (
<div class="row">
<div class="col s12">
<div class="card blue lighten-5">
<div class="card-content">
<table class="bordered highlight">
<thead>
<tr>
<th data-field="id">Amount Borrowed</th>
<th data-field="name">Days</th>
<th data-field="price">Total Due</th>
<th data-field="price">Payment Date</th>
</tr>
</thead>
<tbody>
{itemslist}
</tbody>
</table>
</div>
</div>
</div>
</div>
);
}
}
来自父类的贷款数据
export default class Tabs extends React.Component {
constructor(props) {
super(props)
this.state = {
loan:[]
};
}
/* updates the state variables before passing to History */
handler(money,daysCount,dueMoney,datePay,ext,date) {
loanArray.push({
moneyBorrowed:money,
daysNo:daysCount,
moneyDue: dueMoney,
PayDay:datePay,
extension:ext,
dateMilli:date
});
this.setState({
loan:loanArray
});
}
答案 0 :(得分:0)
这应该与flux或redux相当简单。 在您的情况下,您需要在Tabs中创建一个新功能来设置状态。例如:
constructor(props) {
super(props)
this.state = {
loan:[]
};
this.updateState = this.updateState.bind(this);
}
updateState(loanData) {
this.state = {
loan: loanData
};
}
您应该将此功能作为道具组件传递给道具组件。
<History updateState={this.updateState} loan={this.state.loan} />
然后在History组件中,你应该将你的功能更新为:
extend(index){
this.setState({
extended: true
});
this.props.loan[index] = "something";
this.props.updateState(this.props.loan);
}
也将此行更改为:
var extendBtn = <a class="waves-effect waves-light btn small green lighten" onClick={that.extend.bind(that, index)}>Extend!</a>;
将此行放在items.map中。
这应该可以解决问题。我没有足够的时间来测试代码。这可能不完全正确。