React Native 调用Objective-C简单例子
React Native 调用Objective-C
参考：https://colinramsay.co.uk/2015/03/27/react-native-simple-native-module.html
在Xcode中，File->New->File->Cocoa Class-> (Class:'SomeString', Subclass Of:'NSObject', Language:'Objective-C')->保存为 项目名/ios/项目名。 这时会生成SomeString.h和SomeString.m文件。
修改这两个文件的内容为:
//SomeString.h
#import "RCTBridgeModule.h"
@interface SomeString : NSObject<RCTBridgeModule>
@end
//SomeString.m
#import "SomeString.h"
@implementation SomeString
RCT_EXPORT_MODULE();
RCT_EXPORT_METHOD(get:(RCTResponseSenderBlock)callback)
{
NSString* someString = @"something, this is from Objective C";
callback(@[someString]);
}
@end
修改index.ios.js
以下是一个参考文件，项目名为Test1,目的是调用Objective-C，返回一个字符串
----
'use strict';
import React, {
AppRegistry,
Component,
StyleSheet,
Text,
View,
NativeModules,
} from 'react-native';
class Test1 extends Component {
constructor(props){
super(props);
this.state = {
text: 'hello',
};
}
componentDidMount() {
var ss = NativeModules.SomeString.get(x=>this.setState({text:x}));
}
render () {
return (
<View style={styles.container} >
<Text>{this.state.text}</Text>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
},
});
AppRegistry.registerComponent('Test1', () => Test1);
---