模拟状况:合并增量后jsbundle文件出现部分错误
调试发现当加载jsbundle出现异常时,RN模块RCTBatchedBridge.m中以下代码会执行:post
- (void)stopLoadingWithError:(NSError *)error { RCTAssertMainThread(); if (!self.isValid || !self.loading) { return; } _loading = NO; [[NSNotificationCenter defaultCenter] postNotificationName:RCTJavaScriptDidFailToLoadNotification object:_parentBridge userInfo:@{@"bridge": self, @"error": error}]; RCTFatal(error); }
所以native模块加入监听处理RCTJavaScriptDidFailToLoadNotification通知的方法便可:测试
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(backToPreVersion) name:RCTJavaScriptDidFailToLoadNotification object:nil]; - (BOOL)backToPreVersion { // rollback }
模拟状况:若是RN代码存在Crash bug
定位代码Crash时代码会执行到RCTAssert.m中以下语句:ui
void RCTFatal(NSError *error) { _RCTLogNativeInternal(RCTLogLevelFatal, NULL, 0, @"%@", [error localizedDescription]); RCTFatalHandler fatalHandler = RCTGetFatalHandler(); if (fatalHandler) { fatalHandler(error); } else { #if DEBUG @try { #endif NSString *name = [NSString stringWithFormat:@"%@: %@", RCTFatalExceptionName, [error localizedDescription]]; NSString *message = RCTFormatError([error localizedDescription], error.userInfo[RCTJSStackTraceKey], 75); [NSException raise:name format:@"%@", message]; #if DEBUG } @catch (NSException *e) { } #endif } }
测试DEBUG模式下RN抛出异常后被catch,不会致使Crash,所以为保证RELEASE版本下程序不会Crash,依旧能更新增量包,由于能够将#if DEBUG的选项去掉,不让程序Crash。spa