javascript 可变反应原生 - 第2部分
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export const changeBaseTheme = BaseTheme => {
//dispatch an action to change light or dark theme
return dispatch => {
dispatch({
type: "CHANGE_BASE_THEME",
baseTheme: BaseTheme
});
};
};
export const changeColorTheme = ColorTheme => {
//dispatch an action to change accent color theme theme
return dispatch => {
dispatch({
type: "CHANGE_COLOR_THEME",
colorTheme: ColorTheme
});
};
};import * as React from "react";
import { Picker } from "react-native";
import { lightTheme, darkTheme, colorOptions } from "./store/theme";
import { connect } from "react-redux";
import styled, { ThemeProvider } from "styled-components";
import { bindActionCreators } from "redux";
import { changeBaseTheme, changeColorTheme } from "./store/actions";
const Container = styled.View`
flex: 1;
flex-direction: column;
justify-content: space-between;
background-color: ${props => props.theme.PRIMARY_BACKGROUND_COLOR};
`;
const Header = styled.View`
padding-top: 10;
padding-bottom: 10;
padding-left: 10;
padding-right: 10;
background-color: ${props => props.theme.PRIMARY_COLOR};
`;
const HeaderText = styled.Text`
font-size: 24;
color: ${props => props.theme.PRIMARY_FOREGROUND_COLOR};
font-family: ${props => props.theme.PRIMARY_FONT_FAMILY};
`;
const Body = styled.View`
flex-direction: column;
justify-content: space-between;
align-items: stretch;
background-color: ${props => props.theme.PRIMARY_BACKGROUND_COLOR};
padding-top: 30;
padding-bottom: 30;
padding-left: 30;
padding-right: 30;
`;
const Segment = styled.View`
padding-top: 10;
padding-bottom: 10;
flex-direction: column;
justify-content: space-between;
align-items: stretch;
`;
const Icon = styled.Image`
height: 60;
width: 60;
`;
const Title = styled.Text`
color: ${props => props.theme.PRIMARY_TEXT_COLOR};
font-size: ${props => props.theme.FONT_SIZE_MASSIVE};
font-family: ${props => props.theme.PRIMARY_FONT_FAMILY};
`;
const Description = styled.Text`
color: ${props => props.theme.PRIMARY_TEXT_COLOR};
font-size: ${props => props.theme.FONT_SIZE_MEDIUM};
font-family: ${props => props.theme.PRIMARY_FONT_FAMILY};
padding-top: 20;
`;
const ItemPicker = styled.Picker`
color: ${props => props.theme.PRIMARY_TEXT_COLOR};
padding-top: 20;
`;
const Footer = styled.View`
padding-top: 20;
padding-bottom: 20;
padding-left: 20;
padding-right: 20;
flex-direction: column;
justify-content: center;
align-items: stretch;
background-color: ${props => props.theme.PRIMARY_BACKGROUND_COLOR};
`;
const Button = styled.TouchableOpacity`
padding-top: 10;
padding-bottom: 10;
padding-left: 10;
padding-right: 10;
flex-direction: column;
justify-content: center;
align-items: stretch;
elevation: 1
border-radius: 2;
background-color:${props => props.theme.PRIMARY_COLOR};
`;
const ButtonText = styled.Text`
text-align: center;
color: ${props => props.theme.PRIMARY_FOREGROUND_COLOR};
font-family: ${props => props.theme.PRIMARY_FONT_FAMILY};
font-size: ${props => props.theme.FONT_SIZE_LARGE};
`;
class Login extends React.Component {
render() {
return (
<ThemeProvider theme={this.props.theme}>
<Container>
<Header>
<HeaderText>Login</HeaderText>
</Header>
<Body>
<Segment>
<Icon
source={{
uri: "https://img.icons8.com/dusk/50/000000/lock-2.png"
}}
/>
</Segment>
<Segment>
<Title>Login</Title>
<Description>
Please enter your username and password to continue
</Description>
</Segment>
<Segment>
<ItemPicker
onValueChange={(itemValue, itemIndex) =>
//make redux action to change the light or dark theme
itemValue !== 0 && this.props.changeBaseTheme(itemValue)
}
selectedValue={null}
>
<Picker.Item label="Please select an base theme" value="0" />
<Picker.Item label="Dark" value={darkTheme} />
<Picker.Item label="Light" value={lightTheme} />
</ItemPicker>
</Segment>
<Segment>
<ItemPicker
style={{}}
onValueChange={(itemValue, itemIndex) =>
//make redux action to change the accent color theme
this.props.changeColorTheme(itemValue)
}
>
<Picker.Item label="Please select an color theme" value="0" />
{Object.keys(colorOptions).map((option, i) => (
//create options for each color option in our theme.js file
<Picker.Item
key={i}
label={option}
value={colorOptions[option]}
/>
))}
</ItemPicker>
</Segment>
</Body>
<Footer>
<Button>
<ButtonText>Login</ButtonText>
</Button>
</Footer>
</Container>
</ThemeProvider>
);
}
}
const mapStateToProps = state => ({
theme: state.themeReducer.theme
});
const mapDispatchToProps = dispatch => ({
changeBaseTheme: bindActionCreators(changeBaseTheme, dispatch),
changeColorTheme: bindActionCreators(changeColorTheme, dispatch)
});
export default connect(
mapStateToProps,
mapDispatchToProps
)(Login);import { base, darkTheme, lightTheme, colorOptions } from "./theme";
// blue
const initialState = {
theme: { ...base, ...lightTheme, ...colorOptions.blue }
};
const themeReducer = (state = initialState, action) => {
switch (action.type) {
case "CHANGE_BASE_THEME":
let newState = {
...state,
theme: { ...state.theme, ...action.baseTheme }
};
return newState;
case "CHANGE_COLOR_THEME":
let newStateTheme = {
...state,
theme: { ...state.theme, ...action.colorTheme }
};
return newStateTheme;
default:
return state;
}
};
export default themeReducer;以上是关于javascript 可变反应原生 - 第2部分的主要内容，如果未能解决你的问题，请参考以下文章