我想在ngrx存储中订阅某个状态，并且仅在该特定状态发生更改时才接收排放。

myStr1 = b'1' myStr0 = b'0' serialC.write(myStr1) print(int(serialC.read().decode()))

export const getMatchesState = (state: State) => state.matches;

当我订阅这个赞

export const getSpainmatches = createSelector(getMatchesState,(allMatches) => {
  return Object.keys(allMatches.byId)
    .filter(key => {
      return allMatches.byId[key].tournamentId == '68';
    }).map(key => allMatches.byId[key]);
});

每次商店匹配更改时，我都会得到排放，不仅是西班牙匹配发生了变化。

更新：

我也尝试过：

this.testSub = this.store.pipe(select(fromRoot.getSpainmatches))
      .subscribe(s => console.log('@@@@',s));

export const getSpainmatches = createSelector(getMatchesState,(allMatches,props) => {
  return Object.keys(allMatches.byId)
    .filter(key => {
      return allMatches.byId[key].tournamentId == props.tournamentId ;
    }).map(key => allMatches.byId[key]);
});

谢谢