我想做一个类似倒计时的效果,当倒计时为0的时候,计时器停止,但是目前不知道怎么做,求大神解答,谢谢!新手求助!
目前有如下代码:
const totalCount = 10;
class Register extends Component {
...
// 构造
constructor(props) {
super(props);
// 初始状态
this.state = {
count: totalCount
};
this.componentWillUnMount = this.componentWillUnMount.bind(this);
}
componentWillUnMount() {
clearInterval(this.timer);//FIXME:无法实现卸载时清除计时器
}
count() {
this.timer = setInterval(()=>this.setState({
count: this.state.count - 1
}
), 1000);
if (this.state.count == 0) {
//clearTimeout(this.timer)//FIXME:确定程序可以走到这里,但是无法实现清除计时器
clearInterval(this.timer);
}
}
render() {
return(
...
<TouchableOpacity onPress={this.count.bind(this)} disabled={!(this.state.count == totalCount || this.state.count == 0)}>
...
</TouchableOpacity>
)
}
}
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