React Native \u306f ES2015\uff08import, from, class, and extends\uff09\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u308b<\/p>\n
<\/p>\n
JSX<\/h6>\n
<View><Text>Hello world!<\/Text><\/View><\/p>\n
- \n
- JavaScript\u306bXML\u3092\u57cb\u3081\u8fbc\u3080\u69cb\u6587<\/li>\n
- \u591a\u304f\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306f\u30de\u30fc\u30af\u30a2\u30c3\u30d7\u8a00\u8a9e\u306e\u4e2d\u306b\u30b3\u30fc\u30c9\u3092\u57cb\u3081\u8fbc\u3080\u3051\u3069\u3001React\u306f\u30de\u30fc\u30af\u30a2\u30c3\u30d7\u8a00\u8a9e\u3092\u30b3\u30fc\u30c9\u5185\u306b\u66f8\u304f<\/li>\n
- HTML\u306b\u4f3c\u3066\u308b\u3051\u3069<div>\u3068\u304b\u3092\u4f7f\u7528\u3059\u308b\u306e\u3067\u306f\u306a\u304fReact Native\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u4f7f\u7528\u3059\u308b<\/li>\n
- <Text>\u306f\u3001\u30c6\u30ad\u30b9\u30c8\u3092\u8868\u793a\u3059\u308b\u305f\u3081\u306e\u7d44\u307f\u8fbc\u307f\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3002<span>\u307f\u305f\u3044\u306a\u611f\u3058\u3002<\/li>\n
- <View>\u306f\u3001<div>\u307f\u305f\u3044\u306a\u611f\u3058<\/li>\n<\/ul>\n
<\/p>\n
Components\uff08\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\uff09<\/h6>\n
\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3001HelloWorldApp\u3092\u5b9a\u7fa9<\/p>\n
export default class HelloWorldApp extends Component {\r\n render() {\r\n return (\r\n <View style={{ flex: 1, justifyContent: \"center\", alignItems: \"center\" }}>\r\n <Text>Hello, world!<\/Text>\r\n <\/View>\r\n );\r\n }\r\n}\r\n<\/pre>\n- \n
- React Native\u30a2\u30d7\u30ea\u3092\u4f5c\u308b\u3068\u304d\u306f\u3001\u305f\u304f\u3055\u3093\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u4f5c\u308b\u3053\u3068\u306b\u306a\u308b<\/li>\n
- \u753b\u9762\u306b\u8868\u793a\u3055\u308c\u308b\u3082\u306e\u306f\u3001\u3059\u3079\u3066\u4f55\u304b\u3057\u3089\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8<\/li>\n
- \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u5fc5\u9808\u306a\u3082\u306e\u306f\u3001JSX\u3092\u8fd4\u3059\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u6a5f\u80fd<\/li>\n<\/ul>\n
\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u5236\u5fa1\u3059\u308b\u30c7\u30fc\u30bf\u30bf\u30a4\u30d7\u306b\u306f\u3001props\u3068state \u3063\u3066\u306e\u304c\u3042\u308b\u3002<\/p>\n
props<\/h2>\n
- \n
- \u89aa\u304b\u3089\u6e21\u3055\u308c\u308b\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306a\u30c7\u30fc\u30bf<\/li>\n
- \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u5185\u3067\u5024\u3092\u66f8\u304d\u63db\u3048\u308b\u3053\u3068\u306f\u306a\u3044<\/li>\n
- xxx=’hoge’\u306e\u3088\u3046\u306b\u30bf\u30b0\u5c5e\u6027\u3068\u3057\u3066\u4f7f\u3046<\/li>\n
- \u5909\u6570\u3092\u4f7f\u3046\u3068\u304d\u306f{}\u3067\u304f\u304f\u308b\u3002<Text>Hello {this.props.name},<\/Text><\/li>\n<\/ul>\n
\u578b\u30c1\u30a7\u30c3\u30af\u306e\u30e9\u30a4\u30d6\u30e9\u30ea<\/a><\/p>\n
<\/p>\n
\u753b\u50cf\u3092\u8868\u793a\u3059\u308b\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8<\/h6>\n
import React, {Component} from 'react';\r\nimport { AppRegistry, Image } from 'react-native';\r\n\r\nexport default class App extends Component {\r\n render() {\r\n let pic = {\r\n uri: 'https:\/\/upload.wikimedia.org\/wikipedia\/commons\/d\/de\/Bananavarieties.jpg'\r\n };\r\n return (\r\n <Image source={pic} style={{width: 193, height: 110}}\/>\r\n );\r\n }\r\n}\r\nAppRegistry.registerComponent('HelloWorldApp', () => App);<\/pre>\n- \n
- \u753b\u50cf\u3092\u8868\u793a\u3059\u308b\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u4f5c\u308b\u3068\u304d\u306f\u3001source\u3068\u3044\u3046prop\u3092\u4f7f\u7528\u3059\u308b<\/li>\n
- {pic}\u306f\u3001\u5909\u6570pic\u3092JSX\u306b\u57cb\u3081\u8fbc\u3093\u3067\u3044\u308b<\/li>\n
- props\u306f\u5225\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u5024\u3084\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u6e21\u3059\u3053\u3068\u304c\u3067\u304d\u308b<\/li>\n<\/ul>\n
\u89aa\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304b\u3089\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u6e21\u3059\u3068\u304d<\/p>\n
<Child props={value}\/><\/pre>\n\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8(Child)\u3067\u306f\u3001\u6e21\u3055\u308c\u305f\u5024(value)\u3092props\u3068\u3044\u3046\u540d\u524d\u3067\u6271\u3046<\/p>\n
<\/p>\n
\u30a4\u30d9\u30f3\u30c8\u3092\u89aa\u306b\u4f1d\u3048\u308b\u5834\u5408\u306fprops\u3067\u30cf\u30f3\u30c9\u30e9\u3092\u6e21\u3059<\/h3>\n
\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u5074<\/h6>\n
onPress\u30a4\u30d9\u30f3\u30c8\u3067\u3001\u89aa\u304b\u3089\u8cb0\u3063\u305fprops.onClick\u304c\u547c\u3070\u308c\u308b<\/p>\n
<Button onPress={this.props.onClick} \/><\/pre>\n<\/h6>\n
\u4f7f\u3044\u65b9<\/h6>\n
_onClick(){\r\n console.log('Clicked!!!');\r\n}\r\n\r\n<MyButton onClick={this._onClick} \/><\/pre>\n<\/p>\n
<\/p>\n
state<\/h2>\n
- \n
- \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u5185\u3067\u4fdd\u6301\u3057\u3066\u3044\u308b\u72b6\u614b\u3092\u7ba1\u7406\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/li>\n
- \u4ed6\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3068\u306f\u3084\u308a\u3068\u308a\u3057\u306a\u3044<\/li>\n
- \u5024\u3092\u66f8\u304d\u63db\u3048\u308b\u3068\u304d\u306f setState()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046<\/li>\n
- \u5024\u304c\u5909\u66f4\u3055\u308c\u308b\u3068\uff08setState()\u3059\u308b\u3068)\u3001\u52dd\u624b\u306brender\u304c\u8d70\u308a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u518d\u63cf\u753b\u3055\u308c\u308b<\/li>\n<\/ul>\n
\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u521d\u671f\u5024\u3092\u8a2d\u5b9a\u3057<\/p>\n
constructor(props) {\r\n super(props);\r\n this.state={\r\n x: 0,\r\n };\r\n}<\/pre>\nsetState\u3067\u66f4\u65b0<\/p>\n
this.setState({x: 1});<\/pre>\n<\/p>\n
\u69cb\u6587<\/h2>\n
\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u5ba3\u8a00<\/h3>\n
export default class App extends Component<{}> {<\/pre>\nexport default<\/h6>\n
\u4ed6\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u304b\u3089\u30a4\u30f3\u30dd\u30fc\u30c8\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u3002<\/p>\n
extends Component<\/h6>\n
\u5fc5\u9808\u3002React\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u5ba3\u8a00<\/p>\n
<{}><\/h6>\n
flow\u306e\u66f8\u5f0f<\/p>\n
render\u30e1\u30bd\u30c3\u30c9<\/h3>\n
render() {\r\n return (\r\n \/\/ <View>,<Text> React Native\u306e\u66f8\u5f0f\r\n \/\/ React\u3060\u3068<div>\u3068\u304b<span>\r\n <View style={styles.container}>\r\n <Text style={styles.welcome}>\r\n Welcome to React Native!\r\n <\/Text>\r\n <Text style={styles.instructions}>\r\n To get started, edit App.js\r\n <\/Text>\r\n <Text style={styles.instructions}>\r\n {instructions}\r\n <\/Text>\r\n <\/View>\r\n );\r\n }<\/pre>\nrender\u5185\u3067return\u3057\u305f\u3082\u306e\u304c\u3001\u753b\u9762\u306b\u8868\u793a\u3055\u308c\u308b\u3002<\/p>\n
<View>\u3068\u304b<Text><\/h6>\n
React Native\u306e\u66f8\u5f0f\u3002React\u3060\u3068<div>\u3068\u304b<span>\u3068\u304b\u4f7f\u3046\u3002<\/p>\n
<\/p>\n
View<\/h3>\n
- \n
- div\u306a\u611f\u899a\u3067\u4f7f\u7528\u3059\u308b<\/li>\n
- \u4e2d\u306b\u6587\u5b57\u306f\u304b\u3051\u306a\u3044<\/li>\n<\/ul>\n
Text<\/h3>\n
- \n
- span\u306a\u611f\u899a\u3067\u4f7f\u7528\u3059\u308b<\/li>\n
- \u6587\u5b57\u3092\u63cf\u753b\u3059\u308b\u5834\u5408\u306fText\u3067\u56f2\u3046<\/li>\n<\/ul>\n
StyleSheet<\/h3>\n
const styles = StyleSheet.create({\r\n container: {\r\n flex: 1,\r\n justifyContent: 'center',\r\n alignItems: 'center',\r\n backgroundColor: '#F5FCFF',\r\n },\r\n welcome: {\r\n fontSize: 20,\r\n textAlign: 'center',\r\n margin: 10,\r\n },\r\n instructions: {\r\n textAlign: 'center',\r\n color: '#333333',\r\n marginBottom: 5,\r\n },\r\n});<\/pre>\nCSS in JS \u3067\u5b9a\u7fa9\u3059\u308b<\/h6>\n
CSS\u3092JavaScript\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u5b9a\u7fa9\u3059\u308b<\/p>\n
CSS in JS \u306e\u30eb\u30fc\u30eb<\/h6>\n
- \n
- background-color\u307f\u305f\u3044\u306b\u30cf\u30a4\u30d5\u30f3\u304c\u3042\u308b\u306e\u306fbackgroundColor\u3063\u3066\u611f\u3058\u3067\u30ad\u30e3\u30e1\u30eb\u30b1\u30fc\u30b9\u3067\u5b9a\u7fa9\u3059\u308b<\/li>\n
- \u6570\u5b57\u4ee5\u5916\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u6587\u5b57\u5217\u3067\u5b9a\u7fa9\u3059\u308b\u3002\u3075\u3064\u3046\u306ecss\u3060\u3068red\u3068\u304b\u304c\u4f7f\u3048\u308b\u3051\u3069\u3001CSS in JS \u3067\u306f ‘red’ \u3063\u3066\u66f8\u304f<\/li>\n
- \u30bb\u30ec\u30af\u30bf\u306f\u306a\u3044\uff08p \u3068\u304b .class \u3068\u304b\uff09<\/li>\n
- style\u5c5e\u6027\u306b\u30b9\u30bf\u30a4\u30eb\u3092\u9069\u7528\u3059\u308b<\/li>\n<\/ul>\n
\u6700\u521d\u306e\u3046\u3061\u306fcreate\u30e1\u30bd\u30c3\u30c9\u3060\u3051\u3092\u899a\u3048\u3066\u304a\u304f<\/p>\n
https:\/\/qiita.com\/YutamaKotaro\/items\/d0cd253c998f9b28dd55<\/a><\/p>\n
<View style<\/span><\/strong>={styles.container<\/span><\/strong>}> \u2192 container<\/strong><\/span>\u3063\u3066\u3044\u3046\u30b9\u30bf\u30a4\u30eb\u3092 style\u3063\u3066\u3044\u3046\u5909\u6570<\/span><\/strong>\u306b\u5b9a\u7fa9<\/p>\n
<Text style<\/strong><\/span>={styles.welcome<\/span><\/strong>}> \u2192 welcome<\/span><\/strong>\u3063\u3066\u3044\u3046\u30b9\u30bf\u30a4\u30eb\u3092 style\u3063\u3066\u3044\u3046\u5909\u6570<\/span><\/strong>\u306b\u5b9a\u7fa9<\/p>\n
<Text style<\/span><\/strong>={styles.instructions<\/strong><\/span>}> \u2192 instructions<\/span><\/strong>\u3063\u3066\u3044\u3046\u30b9\u30bf\u30a4\u30eb\u3092 style\u3063\u3066\u3044\u3046\u5909\u6570<\/span><\/strong>\u306b\u5b9a\u7fa9<\/p>\n
container: {\r\n flex: 1,\r\n justifyContent: 'center',\r\n alignItems: 'center',\r\n backgroundColor: '#F5FCFF',\r\n },<\/pre>\nflex<\/h6>\n
- \n
- flex: 1 \u3067\u753b\u9762\u5168\u4f53\u8868\u793a<\/li>\n
- flex\u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u753b\u9762\u4e0a\u306b\u5bfe\u3059\u308b\u8981\u7d20\u306eflexDirection\u65b9\u5411\u306e\u5927\u304d\u3055\u306e\u6bd4\u7387<\/li>\n
- position:’fixed’\u304c\u306a\u3044<\/li>\n<\/ul>\n
const style = StyleSheet.create({\r\n container:{\r\n marginTop:20,\r\n flex:1,\r\n \/\/flexDirection:'column' ##defaultValue\r\n }\r\n});<\/pre>\n\u2191\u8981\u7d20\u304c\u306a\u3044\u3068\u304d\u306f\u76ee\u4e00\u676f\u5e83\u304c\u308b\u304c\u3001\u8981\u7d20\u304c\u5897\u3048\u308b\u3068\u5747\u7b49\u5272\u306b\u306a\u308b<\/p>\n
\u3053\u3093\u306a\u611f\u3058\u2193<\/h6>\n
\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8<\/p>\n
export default class App extends Component<{}> {\r\n \/\/ render\u30e1\u30bd\u30c3\u30c9\r\n \/\/ \u3053\u3053\u3067return\u3057\u305f\u3082\u306e\u304c\u753b\u9762\u306b\u8868\u793a\u3055\u308c\u308b\r\n render() {\r\n return (\r\n \/\/ <View>,<Text> React Native\u306e\u66f8\u5f0f\r\n \/\/ React\u3060\u3068<div>\u3068\u304b<span>\r\n <View style={styles.container}>\r\n <View style={styles.header}>\r\n <Text style={styles.title}>\u305f\u3044\u3068\u308b<\/Text>\r\n <\/View>\r\n <View>\r\n <Text style={styles.mainContents}>\u3081\u3044\u3093\u3053\u3093\u3066\u3093\u3064<\/Text>\r\n <\/View>\r\n <\/View>\r\n );\r\n }\r\n}<\/pre>\n\u30b9\u30bf\u30a4\u30eb<\/p>\n
const styles = StyleSheet.create({\r\n container: {\r\n flex: 1,\r\n backgroundColor: 'skyblue',\r\n },\r\n header: {\r\n \/\/fontSize: 20,\r\n \/\/textAlign: 'center',\r\n \/\/margin: 10,\r\n flex: 0.5,\r\n backgroundColor: 'pink'\r\n },\r\n title: {\r\n marginTop: 100,\r\n textAlign: 'center',\r\n fontSize: 40,\r\n },\r\n mainContents: {\r\n marginTop: 100,\r\n textAlign: 'center',\r\n fontSize: 20,\r\n }\r\n});<\/pre>\n
![\"\"](\"https:\/\/greentown.tokyo\/wp-content\/uploads\/2019\/04\/dcacb6a63ecf05b1d223beb24efc87a9-150x300.png\")
<\/a><\/p>\n![\"\"](\"https:\/\/greentown.tokyo\/wp-content\/uploads\/2019\/04\/8c2518597a0c2b872aadd4b52d2cd438-152x300.png\")
<\/a><\/p>\n