用react-native实现一个数独游戏(总结)
2017-12-20 本文已影响0人
ITgecko
前言
- 最近用react-native做了一个数独游戏的app,到今天基本功能已经全都完成并打包在真机上测试了,这里总结一下开发过程中的一些问题和实现的思路。
环境和平台选择
- 项目上读取的接口是我自己服务器上部署的,用node实现的接口,链接mysql数据库,数独题目就是从这里读取得到。因为服务器上只有http接口,所以app开发时也就选择的android版本。
功能及实现
- 因为只是一个简单的demo,做的功能也比较简单:新游戏/继续游戏/选择难度。页面有三个:首页/棋盘页面/关于。
- 首先在最外层的App.js里引入react-navigation,并配置路由信息,我这里用的其中的DrawerNavigator。
import React, { Component } from 'react'
import {
Platform,
StyleSheet,
Text,
View
} from 'react-native'
import MainScreen from './components/mainScreen'
import homePage from './components/app'
import aboutScreen from './components/about'
import {
DrawerNavigator
} from 'react-navigation'
const App = DrawerNavigator({
Home: {
screen: homePage,
navigationOptions: {
drawerLabel: '主菜单'
}
},
Main: {
screen: MainScreen
},
About: {
screen: aboutScreen,
navigationOptions: {
drawerLabel: '关于'
}
}
})
export default App
首页菜单
-
使用了一个RN自带的picker组件来选择难度,然后选择新游戏时将选择的难度带入到棋盘页面,点击继续时,会判断当前缓存中是否有之前保存的棋盘信息,有的话就直接进入棋盘页面。
首页.png - 点击关于则是跳转到一个介绍页面,首页暂时就这些。代码如下:
import React, { Component } from 'react'
import deviceStorage from './../common/DeviceStorage'
import {
StyleSheet,
Text,
View,
TouchableNativeFeedback,
Picker,
Alert
} from 'react-native'
export default class App extends Component {
constructor () {
super()
this.state = {
text: 'Easy',
select: ''
}
deviceStorage.get('difficulty').then(val => {
// 没有值时,val为null
if (val) {
this.setState({
text: val,
select: ''
})
}
})
}
newGamePress = () => {
let {text} = this.state
deviceStorage.save('difficulty', text).then(() => {
this.props.navigation.navigate('Main', {difficulty: text, newgame: true})
})
}
continuePress = () => {
deviceStorage.get('Checkerboard').then((arr) => {
if (arr) {
this.props.navigation.navigate('Main', {newgame: false})
} else {
return Promise.reject()
}
}).catch(() => {
Alert.alert('无法找到之前的记录,重新开始吧~')
})
}
aboutPress = () => {
this.props.navigation.navigate('About')
}
render () {
return (
<View style={styles.container}>
<Text style={styles.titleText}>数独游戏</Text>
<View style={styles.homeBtnGroup}>
<TouchableNativeFeedback onPress={this.newGamePress}>
<Text style={styles.homeBtn}>新游戏</Text>
</TouchableNativeFeedback>
<TouchableNativeFeedback onPress={this.continuePress}>
<Text style={styles.homeBtn}>继续</Text>
</TouchableNativeFeedback>
<TouchableNativeFeedback onPress={this.aboutPress}>
<Text style={styles.homeBtn}>关于</Text>
</TouchableNativeFeedback>
<View style={{width: 250, backgroundColor:'skyblue',margin:15,borderRadius: 15}}>
<Picker
selectedValue={this.state.text}
onValueChange={(lang) => this.setState({text: lang})}>
<Picker.Item label="简单" value="Easy" />
<Picker.Item label="中等" value="Medium" />
<Picker.Item label="困难" value="Hard" />
</Picker>
</View>
</View>
</View>
)
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
flexDirection: 'column'
},
homeBtn: {
width: 250,
backgroundColor: 'skyblue',
margin: 20,
borderRadius: 15,
textAlign: 'center',
fontSize: 20
},
homeBtnGroup: {
flex: 1,
flexDirection: 'column',
alignItems:'center'
},
titleText: {
fontSize: 20,
marginTop: 10,
textAlign:'center'
}
})
棋盘页面
- 数独棋盘的生成,是从数据库得到数据(事先存储了几个题目),然后再渲染出来。一开始我是打算随机生成棋盘的,但是发现生成的棋盘可能会出现多解的情况,最后想想还是算了,在网上找了几个数独题目存在数据库里。
-
用node.js在服务器上写了个接口,根据传入难度从数据库随机取一条该难度的题目返回。服务端只提供题目,结果验证在前端即可完成。
image.png - 这里交互也很简单,事先为空白的格子才是可选中的,选中后再从下面选择数字或者清空。每次修改后,也将当前棋盘存入到缓存中(其实这样做不是很好,可以监听离开当前页面,再执行存缓存的操作)。
- 触发提交按钮后,会对棋盘进行验证,有空白没有填完则返回,然后再依次判断各个点是否满足数独条件,判断方法可参考LeetCode上的一道题:Valid Sudoku,答案在这里。
- 数据存储还是使用的react-native提供的AsyncStorage,并对其进行一层包装。未完成的棋局缓存起来,继续游戏的时候再调用。
/**
* Sample React Native App
* https://github.com/facebook/react-native
* @flow
*/
import React, { Component } from 'react'
import deviceStorage from './../common/DeviceStorage'
import {
Text,
StyleSheet,
View,
Button,
TouchableHighlight,
Alert
} from 'react-native'
export default class App extends Component {
constructor () {
super()
this.state = {
arr: [],
chooseIndex: -1
}
}
componentDidMount () {
const { params } = this.props.navigation.state
if (params.newgame) {
// 新游戏
fetch(`http://101.200.35.148:8081/sudo/getSudo?difficulty=${params.difficulty}`)
.then(response => {
response.json().then(
// 这里的result就是最终的接口数据了
(data) => {
let {result} = data
this.setState({
arr: result,
})
}
)
})
} else {
// 继续游戏
deviceStorage.get('Checkerboard').then((arr) => {
this.setState({arr})
})
}
}
renderArr = () => {
let {arr, chooseIndex} = this.state
return arr.map((item, index) => {
if (typeof item == "string") {
return (
<View key={index} style={chooseIndex == index ? styles.bChoosen : styles.bRow}>
<TouchableHighlight onPress={(ev) => {this.pressAction(ev, index)}}>
<Text style={styles.editableText}>{item === '' ? ' ' : item}</Text>
</TouchableHighlight>
</View>
)
} else {
return (
<View key={index} style={styles.bRow}>
<Text style={styles.text}>{item}</Text>
</View>
)
}
})
}
pressAction = (ev, index) => {
this.setState({
chooseIndex: index
})
}
judgeResult = () => {
let arr = this.state.arr
let dp = {}
let index = 0
for (let a = 0; a < 3; a++) {
for (let b = 0; b < 3; b++) {
dp[`area${a}${b}`] = new Map()
}
}
for (let i = 0; i < 9; i++) {
dp[`x${i}`] = new Map()
dp[`y${i}`] = new Map()
}
for (let i = 0; i < 9; i++) {
for (let j = 0; j < 9; j++) {
let temp = arr[index]
if (temp !== '') {
let xIndex = 'x' + j
let yIndex = 'y' + i
let areaIndex = 'area' + Math.floor(j/3) + Math.floor(i/3)
if (dp[xIndex].has(temp) || dp[yIndex].has(temp) || dp[areaIndex].has(temp)) {
return [false, '有空格填错了哦~', index]
} else {
dp[xIndex].set(temp, true)
dp[yIndex].set(temp, true)
dp[areaIndex].set(temp, true)
}
} else {
return [false, '还有空格没填完哦~']
}
index++
}
}
return [true]
}
selectAction = (ev, item) => {
let {arr, chooseIndex} = this.state
arr[chooseIndex] = item
deviceStorage.save('Checkerboard', arr).then(() => {})
this.setState({arr})
}
cleanAction = () => {
let {arr, chooseIndex} = this.state
if (chooseIndex === -1) {
return
}
arr[chooseIndex] = ''
this.setState({arr})
}
submitAction = () => {
let {arr} = this.state
let result = this.judgeResult()
if (result[0]) {
Alert.alert(
'完成~'
)
deviceStorage.delete('Checkerboard')
this.props.navigation.navigate('Home')
} else {
Alert.alert(
result[1]
)
if (result[2]) {
this.setState({
chooseIndex: result[2]
})
}
}
}
render () {
return (
<View>
<View style={styles.container}>
<Text>mainScreen</Text>
<View style={styles.MScontainer}>
{this.renderArr()}
<View style={styles.borderView1}></View>
<View style={styles.borderView2}></View>
<View style={styles.borderView3}></View>
<View style={styles.borderView4}></View>
</View>
</View>
<View style={styles.bottomContainer}>
{
['1','2','3','4','5','6','7','8','9'].map((item, index) => {
return (
<View key={index} style={styles.bottomSpan}>
<TouchableHighlight onPress={(ev) => {this.selectAction(ev, item)}}>
<Text style={styles.text}>{item}</Text>
</TouchableHighlight>
</View>
)
})
}
<View style={styles.bottomContainer2}>
<View style={styles.buttonStyle}>
<Button
onPress={this.cleanAction}
title="清空"
color="#841584"
/>
</View>
<View style={styles.buttonStyle}>
<Button
onPress={this.submitAction}
title="提交"
color="#841584"
/>
</View>
</View>
</View>
</View>
)
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
alignItems: 'center',
},
MScontainer: {
flex: 1,
flexWrap: 'wrap',
width: 360,
flexDirection: 'row',
margin: 10
},
borderView1: {
position: 'absolute',
top: 120,
left: 0,
width: 360,
height: 0,
borderColor: 'black',
borderStyle: 'solid',
borderWidth: 1.5,
},
borderView2: {
position: 'absolute',
top: 240,
left: 0,
width: 360,
height: 0,
borderColor: 'black',
borderStyle: 'solid',
borderWidth: 1.5,
},
borderView3: {
position: 'absolute',
top: 0,
left: 120,
width: 0,
height: 360,
borderColor: 'black',
borderStyle: 'solid',
borderWidth: 1.5,
},
borderView4: {
position: 'absolute',
top: 0,
left: 240,
width: 0,
height: 360,
borderColor: 'black',
borderStyle: 'solid',
borderWidth: 1.5,
},
bottomContainer: {
flex: 1,
marginTop: 450,
width: 360,
flexDirection: 'row',
alignItems: 'center'
},
bottomContainer2: {
position: 'absolute',
top: 20,
flex: 1,
flexDirection: 'row',
},
buttonStyle: {
margin: 10,
width: 70,
height: 50
},
bottomSpan: {
margin: 5,
width: 35,
height: 35,
borderColor: 'skyblue',
borderStyle: 'solid',
borderWidth: 1,
borderRadius: 5
},
bRow: {
width: 40,
height: 40,
borderColor: 'skyblue',
borderStyle: 'solid',
borderWidth: 1
},
bChoosen: {
width: 40,
height: 40,
borderColor: 'crimson',
borderStyle: 'solid',
borderWidth: 2
},
text: {
textAlign: 'center',
fontSize: 25
},
editableText: {
textAlign: 'center',
fontSize: 25,
color: 'green'
}
})