我试图在我的应用程序中创建一个秒表,并为此设置一个间隔,使其每10ms运行一次,并且在每10ms运行一次的函数内部更新时间。这里的问题是,当我运行它时,百毫秒(10ms)的运行速度非常慢,好像我已经放置了100ms。
const HomeScreen = ({ route, navigation }: Props) => {
const [time, setTime] = useState({ ms: 0, s: 0, m: 0 });
const [interv, setInterv] = useState();
const [status, setStatus] = useState(0);
// Not started = 0
// started = 1
// stopped = 2
const start = () => {
run();
setStatus(1);
setInterv(setInterval(run, 10));
};
var updatedMs = time.ms,
updatedS = time.s,
updatedM = time.m;
const run = () => {
if (updatedS === 60) {
updatedM++;
updatedS = 0;
}
if (updatedMs === 100) {
updatedS++;
updatedMs = 0;
}
updatedMs++;
return setTime({ ms: updatedMs, s: updatedS, m: updatedM });
};
const stop = () => {
clearInterval(interv);
setStatus(2);
};
const reset = () => {
clearInterval(interv);
setStatus(0);
setTime({ ms: 0, s: 0, m: 0 });
};
const resume = () => start();
...
答案 0 :(得分:0)
setInterval的问题在于它取决于引擎处理代码和其他各种负载。