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React Native vs iOS エンジニア - iOSDC 2017
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laiso
September 16, 2017
Technology
2
780
React Native vs iOS エンジニア - iOSDC 2017
http://blog.lai.so/entry/iosdc2017-talk
laiso
September 16, 2017
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Transcript
React Native vs iOS ΤϯδχΞ iOSDC 2017
ViewΛͲ͏࡞Δ͔ʁ
Viewͷ։ൃ͍͠ • ϢʔβʔView͔ΒใΛಡΈऔΔ • ϢʔβʔViewΛ௨ͯ͡ର͢Δ • ։ൃऀViewΛ࡞Γ͍ͨ
• ੈք࠷େͷϢʔβʔنΛ࣋ͭViewͷఏڙऀ
Who am I ? • id:laiso • iOS/Android Developer •
ϑϨʔϜϫʔΫݚڀՈ
React NativeͱԿ͔ • "React" ͰiOSAndroidͷωΠςΟϒΞϓϦέʔγϣ ϯ͕։ൃͰ͖Δπʔϧ܈
ReactͱԿ͔ • JavaScriptͷViewϥΠϒϥϦ • ϓϥοτϑΥʔϜɺύϥμΠϜ
class ArticleViewController extends Component { // loadView() render() { return
( <View> <Text> {this.props.model.content} </Text> <Button title="LIKE" onPress={this._handleButtonPress} /> </View> ); } }
React NativeͷΈ • ΞϓϦόϯυϧͷJavaScriptΛಡΈࠐΈ • ViewΛ෦σʔλߏͰܭࢉ͢Δ(JavaScriptCore) • ݁ՌΛUIViewʹϦΞϧλΠϜͰదԠ͢Δ
UIKitϓϩάϥϛϯάͷ • ViewControllerΛத৺ͱͨ͠Viewͷߏ • ViewͷංେԽ
Reactͷϓϩάϥϛϯά • ViewͷඳըͷৄࡉΛϑϨʔϜϫʔΫʹͤΔ • Viewͷ݁ՌΛίʔυͰදݱ • એݴతͳView
ReactͷએݴతͳViewͷར • ঢ়ଶม͕ಉ͡ͳΒߏ͞ΕΔView(݁Ռ)ಉ͡ • ͕ͯ͢ render() ʹू·Δ • ෳࡶͳViewΛมߋ͘͢͢͠Δ
render() { return ( <View> <ArticleView model={this.article} onPress={this._handleLikePress} /> <LikeCountView
count={this.state.likeCount} /> <FooterView /> </View> ); }
ίϯϙʔωϯτࢦͳViewͷར • ཧͷ͢͠͞ • ςετͷ͢͠͞ • ڞ௨Խ
UIViewControllerͷ • ίϯϙʔωϯτͷڠௐੑ • addChildViewController() • addSubview(), didMoveToParentViewController()
·ͱΊɿReactͲ͏ViewΛ࡞Δͷ͔ʁ • એݴతͳViewΛίϯϙʔωϯτԽͯ͠ • ίϯϙʔωϯτΛΈ߹ΘͤΔ͜ͱͰViewΛ࡞Δ
·ͱΊɿUIKitͲ͏ViewΛ࡞Δͷ͔ʁ • ॳظͷը໘ఆٛΛϩʔυͯ͠ • ViewΛखಈͰॻ͖͑Δ • ͯ͢Λ1ը໘ͷViewControllerʹͤΔ
React Native is Dream • ຊདྷෳࡶͳView։ൃΛγϯϓϧʹͯ͠͠·͏ྗ • ύϥμΠϜɺΤίγεςϜͷڞ༗ • ݱ࣮ੈքͷΛղܾ͢ΔͨΊʹੜ·Εٕͨज़
UIKitϓϩάϥϛϯάͷ՝ • ໋ྩతͳViewͷଟ͞ • ॊೈੑʹ͚ܽΔComponent
UIKitϓϩάϥϛϯάͷະདྷ
CocoaόΠϯσΟϯάͷiOSαϙʔτ
XMLϨΠΞτ • Windows XAML • Android Layouts • XMLϦςϥϧ in
Swift?
ίϯϙʔωϯτࢦͷUIViewController • Storyboard NEXT • Dataflow Architecture, State Management
React NativeͰʮະདྷͷiOSϓϩάϥϛϯάʯ Λ૾ʢʣ͠·ͤΜ͔ʁ $ npm i -g react-native-cli