我正在尝试使用Google API中的导入数据创建反应组件。我可以看到代码在console.log中工作但是当我尝试在React渲染方法中使用该代码时,我没有得到任何东西。当我在类中移动我的函数时,它会作为未定义的函数出现。我不明白为什么?
function handleTouchTap() {
console.log('CHIP selected');
authorize();
}
function handleAccounts(response) {
console.log(response.result.username);
var username = response.result.username
console.log(username);
}
function authorize(event) {
var useImmidiate = event ? false : true;
var authData = {
client_id: CLIENT_ID,
scope: SCOPES,
immidiate: useImmidiate
};
gapi.auth.authorize(authData, function (response) {
gapi.client.load('analytics', 'v3').then(function () {
console.log(response);
gapi.client.analytics.management.accounts.list().then(handleAccounts);
});
});
}
class Chips extends React.Component {
render() {
return (
<div style={styles.wrapper}>
<Chip
onTouchTap={handleTouchTap}
style={styles.chip} >
<Avatar icon={<FontIcon className="material-icons">perm_identity</FontIcon>} />
Login
</Chip>
<Chip
style={styles.chip} >
<Avatar icon={<FontIcon className="material-icons">account_circle</FontIcon>} />
{this.username}
</Chip>
</div>
);
}
}
&#13;
答案 0 :(得分:1)
在大多数情况下,当您想渲染可能会发生变化的内容时,您希望将其添加到状态中。这样,当您调用setState
时,组件知道它需要重新呈现并显示更改。
这里我将函数添加为组件方法,以便您可以在结果上调用this.setState
。理想情况下,您可能会使用redux和使用操作执行此操作,但这将作为自包含组件。
class Chips extends React.Component {
handleTouchTap = () => {
console.log('CHIP selected');
this.authorize();
}
handleAccounts = (response) => {
var username = response.result.username;
this.setState({
username
});
}
authorize = (event) => {
var useImmidiate = event ? false : true;
var authData = {
client_id: CLIENT_ID,
scope: SCOPES,
immidiate: useImmidiate
};
gapi.auth.authorize(authData, (response) => {
gapi.client.load('analytics', 'v3').then(() => {
console.log(response);
gapi.client.analytics.management.accounts.list()
.then(this.handleAccounts);
});
});
}
render() {
return (
<div style={styles.wrapper}>
<Chip
onTouchTap={this.handleTouchTap}
style={styles.chip}>
<Avatar icon={<FontIcon className="material-icons">perm_identity</FontIcon>} />
Login
</Chip>
<Chip
style={styles.chip} >
<Avatar icon={<FontIcon className="material-icons">account_circle</FontIcon>} />
{this.state.username}
</Chip>
</div>
);
}
}