iOS端React Native差异化增量更新的实现方法

react-native bundle
Options:
--entry-file <path>   Path to the root JS file, either absolute or relative to JS root
（一般为index.js文件）
--platform [string]   Either "ios" or "android"
（RN入口文件的路径, 绝对路径或相对路径）
--transformer [string]  Specify a custom transformer to be used

--dev [boolean]    If false, warnings are disabled and the bundle is minified
（如果为false, 警告会不显示并且打出的包的大小会变小，默认为--dev true）
--prepack     When passed, the output bundle will use the Prepack format.
（当通过时, 打包输出将使用Prepack格式化，默认为--prepack false）
--bridge-config [string]  File name of a a JSON export of __fbBatchedBridgeConfig. Used by Prepack. Ex. ./bridgeconfig.json
（使用Prepack的一个json格式的文件__fbBatchedBridgeConfig 例如: ./bridgeconfig.json）
 --bundle-output <string>  File name where to store the resulting bundle, ex. /tmp/groups.bundle
（打包后的文件输出目录, 例: /tmp/groups.bundle）
--bundle-encoding [string] Encoding the bundle should be written in (https://nodejs.org/api/buffer.html#buffer_buffer).[default: "utf8"]
（打离线包的格式 可参考链接https://nodejs.org/api/buffer.html#buffer_buffer.默认为utf-8格式）
---sourcemap-output [string] File name where to store the sourcemap file for resulting bundle, ex. /tmp/groups.map
（生成Source Map，但0.14之后不再自动生成source map，需要手动指定这个参数。例: /tmp/groups.map）
--assets-dest [string]  Directory name where to store assets referenced in the bundle
（打包时图片资源的存储路径）
--verbose     Enables logging
（显示打包过程）
--reset-cache    Removes cached files
（移除缓存文件）
--config [string]   Path to the CLI configuration file
（命令行的配置文件路径）

- (void)demo1{
 // 获取l1.txt文件路径
 NSString *path01 = [[NSBundle mainBundle]pathForResource:@"l1" ofType:@"txt"];
 // 根据l1.txt文件路径获取data内容
 NSData *data01 = [NSData dataWithContentsOfFile:path01];
 // 将data内容转换成字符串格式
 NSString *str01 = [[NSString alloc] initWithData:data01 encoding:NSUTF8StringEncoding];
 // 获取l2.txt文件路径
 NSString *path02 = [[NSBundle mainBundle]pathForResource:@"l2" ofType:@"txt"];
 // 根据l2.txt文件路径获取data内容
 NSData *data02 = [NSData dataWithContentsOfFile:path02];
 // 将data内容转换成字符串格式
 NSString *str02 = [[NSString alloc] initWithData:data02 encoding:NSUTF8StringEncoding];
 // 创建DiffMatchPatch工具类对象
 DiffMatchPatch *patch = [[DiffMatchPatch alloc]init];
 // 对比文件内容
 // 执行该语句之后会在bundle目录下生成patches.bat文件(差异补丁文件)
 NSMutableArray *patchesArr = [patch diff_mainOfOldString:str01 andNewString:str02 checkLines:YES];
 // 生成差异补丁包
 NSArray *patchesArr1 = [patch patch_makeFromDiffs:patchesArr];
 // 解析补丁包
 NSArray *newArray = [patch patch_apply:patchesArr1 toString:str01];
 //写入到新文件(注意:这边为了在PC端更加直观的看,直接写入到绝对路径)
 BOOL isTrue = [newArray[0] writeToFile:@"/Users/devil/Desktop/自己的/RNPlatForm/ios/l1.txt" atomically:YES encoding:NSUTF8StringEncoding error:nil];
 if (isTrue) {
 NSLog(@"写入成功");
 }else{
 NSLog(@"写入失败");
 }
}

NSMutableArray *patchesArr = [patch diff_mainOfOldString:str01 andNewString:str02 checkLines:YES];

- (void)demo2{
 // 获取l1.txt文件路径
 NSString *path01 = [[NSBundle mainBundle]pathForResource:@"l1" ofType:@"txt"];
 // 根据l1.txt文件路径获取data内容
 NSData *data01 = [NSData dataWithContentsOfFile:path01];
 // 将data内容转换成字符串格式
 NSString *str01 = [[NSString alloc] initWithData:data01 encoding:NSUTF8StringEncoding];
 // 创建DiffMatchPatch工具类对象
 DiffMatchPatch *patch = [[DiffMatchPatch alloc]init];
 // 获取差异化文件包路径
 NSString *patchesPath = [[NSBundle mainBundle]pathForResource:@"patches.pat" ofType:nil];
 //获取差异化文件内容
 NSData *patchesData = [NSData dataWithContentsOfFile:patchesPath];
 //解析差异化文件内容
 NSString *patchesStr = [[NSString alloc]initWithData:patchesData encoding:NSUTF8StringEncoding];
 //转换pat
 NSMutableArray *patchesArr = [patch patch_fromText:patchesStr error:nil];
 // 解析补丁包
 NSArray *newArray = [patch patch_apply:patchesArr toString:str01];
 //获取新文件路径
// NSString *newFilePath = [[NSBundle mainBundle]pathForResource:@"text3" ofType:@"txt"];
 //写入到新文件(注意:这边为了在PC端更加直观的看,直接写入到绝对路径)
 BOOL isTrue = [newArray[0] writeToFile:@"/Users/devil/Desktop/自己的/RNPlatForm/ios/text3.txt" atomically:YES encoding:NSUTF8StringEncoding error:nil];
 if (isTrue) {
 NSLog(@"写入成功");
 }else{
 NSLog(@"写入失败");
 }
}

//创建两个按钮，第一个按钮跳转RN界面，加载jsbundle包，第二个按钮负责更新jsbundle包
UIButton *btn4 = [[UIButton alloc]init];
 [btn4 setTitle:@"第五个" forState:UIControlStateNormal];
 [btn4 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
 btn4.frame = CGRectMake(40, 170, 60, 30);
 [btn4 addTarget:self action:@selector(clickFifth) forControlEvents:UIControlEventTouchUpInside];
 [self.view addSubview:btn4];
 
 UIButton *btn5 = [[UIButton alloc]init];
 [btn5 setTitle:@"更新第五个界面" forState:UIControlStateNormal];
 [btn5 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
 btn5.frame = CGRectMake(40, 200, 60, 30);
 [btn5 addTarget:self action:@selector(demo2) forControlEvents:UIControlEventTouchUpInside];
 [self.view addSubview:btn5];
//btn4按钮点击事件
- (void)clickFifth{
 NSURL *jsCodeLocation;
 jsCodeLocation = [[NSBundle mainBundle]URLForResource:@"test01old" withExtension:@"jsbundle"];
 [self creactRNPath:jsCodeLocation moduleName:@"test01platcode"]; 
}

- (void)creactRNPath:(NSURL *)jsCodeLocation moduleName:(NSString *)moduleName{
 RCTRootView *rootView = [[RCTRootView alloc] initWithBundleURL:jsCodeLocation
              moduleName:moduleName
            initialProperties:nil