摘要
本文主要讲述了：
- 什么是 Scheduler
- Scheduler 分类
正文
什么是 Scheduler
Scheduler，意为调度程序。
Scheduler 用于控制如何推送通知。
示例：使用asyncScheduler
使用前：同步推送
输入：
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
| <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>Document</title>
<script src="https://unpkg.com/core-js-bundle/index.js"></script>
<script src="https://unpkg.com/regenerator-runtime/runtime.js"></script>
<script src="https://unpkg.com/@babel/standalone@7/babel.min.js"></script>
<script src="https://unpkg.com/@reactivex/rxjs@6/dist/global/rxjs.umd.js"></script>
<script type="text/babel">
const observable = new rxjs.Observable(function (subscriber) {
subscriber.next(1);
subscriber.next(2);
subscriber.next(3);
});
console.log('begin');
observable.subscribe({
next(x) {
console.log(x);
},
});
console.log('end');
</script>
</head>
<body></body>
</html>
|
输出：
使用后：异步推送
输入：
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
| <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>Document</title>
<script src="https://unpkg.com/core-js-bundle/index.js"></script>
<script src="https://unpkg.com/regenerator-runtime/runtime.js"></script>
<script src="https://unpkg.com/@babel/standalone@7/babel.min.js"></script>
<script src="https://unpkg.com/@reactivex/rxjs@6/dist/global/rxjs.umd.js"></script>
<script type="text/babel">
const observable = new rxjs.Observable(function (subscriber) {
subscriber.next(1);
subscriber.next(2);
subscriber.next(3);
}).pipe(rxjs.operators.observeOn(rxjs.asyncScheduler));
console.log('begin');
observable.subscribe({
next(x) {
console.log(x);
},
});
console.log('end');
</script>
</head>
<body></body>
</html>
|
输出：
Scheduler 分类
null
未传递任何 Scheduler。此时通知将以同步的形式推送。
asyncScheduler
此时通知将以异步的形式推送。
参考资料
本文对你有帮助？请支持我
支付宝
微信