React|React Native与iOS交互汇总(无废话,纯干货)
前言
最近用RN开发SDK,涉及RN与iOS各种交互。
有些交互比如用iOS原生切换多个RN页面,以及iOS调用RN的方法,按照网上的方法调不通,一度不知如何是好,网上资料比较少。
于是自己看RN源码分析得出一些方法。
如有问题欢迎指正,有更好的思路方法欢迎分享。
目录
一、 iOS 调用React Native
1,打开一个React Native页面
2,多个React Native页面切换(尽量在RN内实现)
3,iOS调用RN(分是否传参数)
二、React Native调用iOS
1,无参数无回调
2,有多个参数
3,有回调
4,有多个参数多个回调
说明: 1,Demo: RNInteractionWithIOS
- demo截图:
文章图片
Snip20190319_1.png
"react": "16.4.1",
"react-native": "0.56.0"
一、 iOS 调用React Native 1,打开一个React Native页面 比如react-native init RNInteractionWithiOS 创建一个应用之后就会自动在
RNInteractionWithiOS->ios->RNInteractionWithiOS->AppDelegate.m
中生成打开一个React Native页面的代码。核心代码如下: NSURL *jsCodeLocation;
jsCodeLocation = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index" fallbackResource:nil];
RCTRootView *rootView = [[RCTRootView alloc] initWithBundleURL:jsCodeLocation
moduleName:@"RNInteractionWithiOS"
initialProperties:nil
launchOptions:launchOptions];
rootView.backgroundColor = [[UIColor alloc] initWithRed:1.0f green:1.0f blue:1.0f alpha:1];
self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
UIViewController *rootViewController = [UIViewController new];
rootViewController.view = rootView;
self.window.rootViewController = rootViewController;
[self.window makeKeyAndVisible];
2,多个React Native页面切换(尽量在RN内实现) 这个有点难度,当时还研究了半天,几乎没有资料可参考
- RN核心代码:
在index.js中
AppRegistry.registerComponent("App", () => App);
AppRegistry.registerComponent("App2", () => App2);
- iOS中OC核心代码:
- 设置
RCTBridge
的代理 - 实现代理方法
- (NSURL *)sourceURLForBridge:(RCTBridge *)bridge;
- 最关键的:通常情况下我们会使用
initWithBundleURL
创建一个RCTRootView,此处必须
使用initWithBridge
创建RCTRootView
- 设置
#import "ViewController.h"
#import
#import @interface ViewController ()
@property (nonatomic, strong) RCTBridge *bridge;
@end@implementation ViewController- (NSURL *)sourceURLForBridge:(RCTBridge *)bridge {
return [NSURL URLWithString:@"http://127.0.0.1:8081/index.bundle?platform=ios"];
// 模拟器
}- (void)viewDidLoad {
[super viewDidLoad];
_bridge = [[RCTBridge alloc] initWithDelegate:self launchOptions:nil];
}#define RNBounds CGRectMake(0, 0, UIScreen.mainScreen.bounds.size.width-50, UIScreen.mainScreen.bounds.size.height/2.f)- (IBAction)openRNOne {
[self removeRNPage];
[self loadRNView:@"App"];
}- (IBAction)openRNTwo {
[self removeRNPage];
[self loadRNView:@"App2"];
}- (IBAction)removeRNPage {
[self.view.subviews enumerateObjectsUsingBlock:^(__kindof UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
if ([obj isKindOfClass:[RCTRootView class]]) {
[obj removeFromSuperview];
return;
}
}];
}- (void)loadRNView:(NSString *)moduleName {
RCTRootView *rnView2 = [[RCTRootView alloc] initWithBridge:_bridge
moduleName:moduleName
initialProperties:nil];
rnView2.bounds = RNBounds;
rnView2.center = self.view.center;
[self.view addSubview:rnView2];
}
3,iOS调用RN(分是否传参数)
- RN核心代码
componentWillMount() {
DeviceEventEmitter.addListener('EventInit', (msg) => {
let receive = "EventInit: " + msg;
console.log(receive);
this.setState({notice: receive});
});
DeviceEventEmitter.addListener('EventLogin', (msg) => {
let receive = "EventLogin: " + msg;
console.log(receive);
this.setState({notice: receive});
});
}
- iOS核心代码:
- 创建的iOS交互类要引用
#import
和#import
,继承RCTEventEmitter
,并遵守RCTBridgeModule
- 很关键的:交互类要设置
bridge
为当前RCTRootView的bridge
,[[ReactInteraction shareInstance] setValue:rnView.bridge forKey:@"bridge"];
- 创建的iOS交互类要引用
#import
#import
#import @interface ReactInteraction : RCTEventEmitter
+ (instancetype)shareInstance;
- (void)init:(NSString *)parameter;
- (void)login;
@end
ReactInteraction.m文件
#import "ReactInteraction.h"#define INIT @"EventInit"
#define LOGIN @"EventLogin"@implementation ReactInteraction
static ReactInteraction *instance = nil;
RCT_EXPORT_MODULE();
+ (instancetype)shareInstance {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
instance = [[self alloc] init];
});
return instance;
}- (NSArray *)supportedEvents
{
return @[INIT,LOGIN];
}RCT_EXPORT_METHOD(init:(NSString *)msg) {
[self.bridge enqueueJSCall:@"RCTDeviceEventEmitter"
method:@"emit"
args:@[INIT, msg]
completion:NULL];
}RCT_EXPORT_METHOD(login) {
[self.bridge enqueueJSCall:@"RCTDeviceEventEmitter"
method:@"emit"
args:@[LOGIN]
completion:NULL];
}@end
二、React Native调用iOS
- RN核心代码:
import {NativeModules} from 'react-native';
const NativeInteraction = NativeModules.NativeInteraction;
- iOS核心代码:
- 注意点1:
RCT_EXPORT_METHOD
与RCT_REMAP_METHOD
宏定义的使用区别(个人总结,有不对请指正)-
RCT_EXPORT_METHOD
:用于仅有一个参数或回调 -
RCT_REMAP_METHOD
:用于有多个参数或(和)多个回调
(了解更多可以看RN宏定义源码1
,下面贴出关键两句)
-
- 注意点2:iOS回调方式有两种
callback(@[jsonString]); ((RCTPromiseResolveBlock)resolver)
- Promise方式:
_resolveBlock(@[jsonString]); ((RCTResponseSenderBlock)callback)
(了解更多看RN源码2
)
- 注意点1:
#define RCT_REMAP_METHOD(js_name, method) \
_RCT_EXTERN_REMAP_METHOD(js_name, method, NO) \
- (void)method RCT_DYNAMIC;
#define RCT_EXPORT_METHOD(method) \
RCT_REMAP_METHOD(, method)
源码2:
typedef void (^RCTResponseSenderBlock)(NSArray *response);
typedef void (^RCTResponseErrorBlock)(NSError *error);
typedef void (^RCTPromiseResolveBlock)(id result);
typedef void (^RCTPromiseRejectBlock)(NSString *code, NSString *message, NSError *error);
1,无参数回调
- RN核心代码:
NativeInteraction.RNTransferIOS();
- iOS核心代码:
RCT_EXPORT_METHOD(RNTransferIOS) {
NSLog(@"RN调用iOS");
}
2,有多个参数
- RN核心代码:
NativeInteraction.RNTransferIOSWithParameter('{\'para1\':\'rndata1\',\'para2\':\'rndata2\'}');
- iOS核心代码:
RCT_EXPORT_METHOD(RNTransferIOSWithParameter:(NSString *)logString) {
NSLog(@"来自RN的数据:%@",logString);
}
3,有回调
- RN核心代码:
NativeInteraction.RNTransferIOSWithCallBack((data) => {
this.setState({notice: data});
});
- iOS核心代码:
RCT_EXPORT_METHOD(RNTransferIOSWithCallBack:(RCTResponseSenderBlock)callback) {
callback(@[[NSString stringWithFormat:@"来自iOS Native的数据:%@",TestNativeJsonData]]);
}
4,有多个参数多个回调
- RN核心代码:
NativeInteraction.RNTransferIOSWithParameterAndCallBack('rndata1','rndata2').then(result =>{
let jsonString = JSON.stringify(result);
this.setState({notice: jsonString});
}).catch(error=>{
});
- iOS核心代码:
{
RCTPromiseResolveBlock _resolveBlock;
RCTPromiseRejectBlock _rejectBlock;
}
RCT_REMAP_METHOD(RNTransferIOSWithParameterAndCallBack, para1:(NSString *)para1 para2:(NSString *)para2 resolver:(RCTPromiseResolveBlock)resolver rejecter:(RCTPromiseRejectBlock)reject) {
NSLog(@"来自RN的数据:para1——%@, para2——%@",para1, para2);
_resolveBlock=resolver;
_rejectBlock=reject;
NSString *jsonString = TestNativeJsonData;
_resolveBlock(@[jsonString]);
}
如若需要完整代码,请看我写的一个小Demo: RNInteractionWithIOS
【React|React Native与iOS交互汇总(无废话,纯干货)】如上有问题欢迎各路大神留言指正,写博客不容易,大家相互学习。
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