ios - React-Native iOS - 如何通过按下按钮从 React-Native View 导航到非 React-Native View ( native iOS View Controller )？

Question

RN doco 和其他示例展示了如何从 native iOS View Controller 启动 React-Native View ，但反之则不然。谁能解释一下我该怎么做？

Answer 1

我能够弄清楚这一点。在我的例子中，我使用一个 Obj-C 基础项目(这是 RN 的默认项目)和我自己的 Swift native View Controller 。我的解决方案在这里，以防其他人遇到这种情况:

简单地说，答案是使用 RCTBridge 模块允许 RN JavaScript 调用原生 iOS 方法。

这里是组件的大纲，然后是实现:

1. AppDelegate.h/.m - 为初始 RN View 初始化 RN JavaScript 索引文件，同时设置将 Root View Controller 交换为 native View Controller 的方法(此方法将从 RTCBridge 模块调用。

2. MyViewController.swift - 正常 UIViewController具有标准实现。

3. MyProject-Bridging-Header.h - 提供 Obj-C <->快速沟通

4. ChangeViewBridge.h/.m - 这提供了允许您从 RN JavaScript 调用 native iOS 方法的绑定(bind)。

5. index.ios.js - 初始化您的自定义 RCTBridge 模块并调用绑定(bind)方法以通过按下按钮切换到您的 native View 。

AppDelegate.h :

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate> {
  NSDictionary *options;
  UIViewController *viewController;
}

@property (nonatomic, strong) UIWindow *window;

- (void) setInitialViewController;
- (void) goToRegisterView; // called from the RCTBridge module

@end

AppDelegate.m :

#import "AppDelegate.h"
#import <React/RCTBundleURLProvider.h>
#import <React/RCTRootView.h>
#import "FidoTestProject-Swift.h" // Xcode generated import to reference MyViewController.swift from Obj-C

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  options = launchOptions;
  [self setInitialViewController];
  return YES;
}

- (void) setInitialViewController {
  NSURL *jsCodeLocation;

  jsCodeLocation = [NSURL URLWithString:@"http://192.168.208.152:8081/index.ios.bundle?platform=ios&dev=true"];

  RCTRootView *rootView = [[RCTRootView alloc] initWithBundleURL:jsCodeLocation moduleName:@"FidoTestProject" initialProperties:nil launchOptions:options];

  self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
  UIViewController *rootViewController = [UIViewController new];
  rootViewController.view = rootView;
  self.window.rootViewController = rootViewController;

  viewController = rootViewController;

  [self.window makeKeyAndVisible];
}

// this method will be called from the RCTBridge
- (void) goToNativeView {
  NSLog(@"RN binding - Native View - MyViewController.swift - Load From "main" storyboard);
  UIViewController *vc = [UIStoryboard storyboardWithName:@"main" bundle:nil].instantiateInitialViewController;
  self.window.rootViewController = vc;
}

@end

MyViewController.swift :

class RegisterViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        print("MyViewController loaded...")
        // standard view controller will load from RN
    }
}

MyProject-Bridging-Header.h :

@import Foundation;
@import UIKit;
@import CoreLocation;
@import AVFoundation;

#import "React/RCTBridge.h"
#import "React/RCTBridgeModule.h"
#import "React/RCTBundleURLProvider.h"
#import "React/RCTRootView.h"
#import "AppDelegate.h"

ChangeViewBridge.h :

#import <React/RCTBridgeModule.h>

@interface ChangeViewBridge : NSObject <RCTBridgeModule>

- (void) changeToNativeView;

@end

ChangeViewBridge.m :

#import "RegisterBridge.h"
#import "FidoTestProject-Swift.h"
#import "AppDelegate.h"

@implementation ChangeViewBridge

// reference "ChangeViewBridge" module in index.ios.js
RCT_EXPORT_MODULE(ChangeViewBridge);

RCT_EXPORT_METHOD(changeToNativeView) {
  NSLog(@"RN binding - Native View - Loading MyViewController.swift");
  AppDelegate *appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
  [appDelegate goToNativeView];
}

@end

index.ios.js

/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 * @flow
 */

'use strict';

import React, { Component } from 'react';
import {
  AppRegistry,
  StyleSheet,
  Alert,
  Text,
  View,
  NativeModules,
  TouchableHighlight
} from 'react-native';

export default class FidoTestProject extends Component {

  constructor(props) {
     super(props)
     this.done = false;
   }

    _changeView() {
      this.done = true;
      this.render();
      NativeModules.ChangeViewBridge.changeToNativeView();
    }

  render() {
    if (!this.done) {
      return (
        <View style={styles.container}>
          <TouchableHighlight onPress={() => this._changeView()}>
            <Text color="#336699">
              Press to Change to Native View
            </Text>
          </TouchableHighlight>
        </View>
      );
    } else {
      return (<View></View>);
    }
  }
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#F5FCFF',
  }
});

AppRegistry.registerComponent('FidoTestProject', () => FidoTestProject);