具有相同动作的减速器会影响多个屏幕
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我有两个减速器分享一些动作。问题是当我在一个屏幕上发送操作时,它会在另一个屏幕上触发操作。两个屏幕都在TabNavigator中,因此我可以很容易地看到,如果我在1个屏幕上更改字段,则同一个字段也会在另一个屏幕上更改。
减速机1
import * as Actions from '../actions/Types';
const initialState = {
email: '',
password: ''
};
const signInReducer = (state = initialState, action) => {
switch(action.type) {
case Actions.CHANGE_EMAIL_INPUT:
return Object.assign({}, state,
{ email: action.email }
);
case Actions.CHANGE_PASSWORD_INPUT:
return Object.assign({}, state,
{ password: action.password }
);
default:
return state;
}
}
export default signInReducer;
减速机2
import * as Actions from '../actions/Types';
const initialState = {
firstName: '',
lastName: '',
email: '',
password: '',
repeatPassword: ''
};
const signUpReducer = (state = initialState, action) => {
switch(action.type) {
case Actions.CHANGE_FIRST_NAME_INPUT:
return Object.assign({}, state,
{ firstName: action.firstName }
);
case Actions.CHANGE_LAST_NAME_INPUT:
return Object.assign({}, state,
{ lastName: action.lastName }
);
case Actions.CHANGE_EMAIL_INPUT:
return Object.assign({}, state,
{ email: action.email }
);
case Actions.CHANGE_PASSWORD_INPUT:
return Object.assign({}, state,
{ password: action.password }
);
case Actions.CHANGE_REPEAT_PASSWORD_INPUT:
return Object.assign({}, state,
{ repeatPassword: action.password }
);
default:
return state;
}
}
export default signUpReducer;
商店
import { createStore, combineReducers } from 'redux';
import signInReducer from '../reducers/SignIn';
import signUpReducer from '../reducers/SignUp';
import profileReducer from '../reducers/Profile';
const rootReducer = combineReducers({
signIn: signInReducer,
signUp: signUpReducer,
profile: profileReducer
});
const configureStore = () => {
return createStore(rootReducer);
}
export default configureStore;
正如您所看到的,有一些常见的操作,如CHANGE_EMAIL_INPUT和CHANGE_PASSWORD_INPUT,我不希望它们一起被触发。我可以弄清楚的一种方法是更改操作的名称,然后使屏幕更具体,但这听起来不太好。另一个可能是包装Reducer,以便我们知道被调用的内容但是没有在包装器上得到一个想法。
有什么建议。
答案
您不应在2个reducer之间重复使用相同的操作名称,以避免意外的影响,使用不同的名称。
例如
Actions.SIGNUP_ CHANGE_EMAIL_INPUT
和Actions.SIGNIN_ CHANGE_EMAIL_INPUT
否则,您可以合并您的2个Reducer,添加一个状态以了解此更改出现在哪个屏幕上。
另一答案
好吧,我通过为减速器创建一个包装器来解决它。
商店
function createNamedWrapperReducer(reducerFunction, reducerName) {
return (state, action) => {
const isInitializationCall = state === undefined;
const shouldRunWrappedReducer = reducerName(action) || isInitializationCall;
return shouldRunWrappedReducer ? reducerFunction(state, action) : state;
}
}
const rootReducer = combineReducers({
// signIn: signInReducer,
// signUp: signUpReducer,
// profile: profileReducer
signIn: createNamedWrapperReducer(signInReducer, action => action.name === 'signIn'),
signUp: createNamedWrapperReducer(signUpReducer, action => action.name === 'signUp'),
profile: createNamedWrapperReducer(profileReducer, action => action.name === 'profile'),
});
屏幕
onChangeEmail: (email) => { dispatch({name: 'signIn', type: Actions.CHANGE_EMAIL_INPUT, email: email}) },
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