React Native iOS App crashes <p>I followed the "Getting Started" to build my first React Native App.</p> <p>This is what I do:</p> <pre><code>npm install -g yarn react-native-cli react-native init AwesomeProject cd AwesomeProject react-native run-ios </code></pre> <p>However, the app crashed after building successfully.</p> <p>Then I open Xcode to run the app, but the app crashed again.</p> <p>Here is the information:</p> <pre><code>2016-12-05 13:26:26.633 [info][tid:main][RCTBatchedBridge.m:73] Initializing &lt;RCTBatchedBridge: 0x60800019f210&gt; (parent: &lt;RCTBridge: 0x6080000b1460&gt;, executor: RCTJSCExecutor) 2016-12-05 13:26:26.634 AwesomeProject[89471:10945233] *** Assertion failure in -[RCTBatchedBridge loadSource:onProgress:](), /Users/Leaf/Desktop/AwesomeProject/node_modules/react-native/React/Base/RCTBatchedBridge.m:197 2016-12-05 13:26:26.663 AwesomeProject[89471:10945233] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'bundleURL must be non-nil when not implementing loadSourceForBridge' *** First throw call stack: ( 0 CoreFoundation 0x000000010adcc34b __exceptionPreprocess + 171 1 libobjc.A.dylib 0x0000000109cda21e objc_exception_throw + 48 2 CoreFoundation 0x000000010add0442 +[NSException raise:format:arguments:] + 98 3 Foundation 0x00000001098a6d79 -[NSAssertionHandler handleFailureInFunction:file:lineNumber:description:] + 166 4 AwesomeProject 0x00000001093ef035 -[RCTBatchedBridge loadSource:onProgress:] + 997 5 AwesomeProject 0x00000001093ed1a3 -[RCTBatchedBridge start] + 883 6 AwesomeProject 0x000000010942d20c -[RCTBridge setUp] + 684 7 AwesomeProject 0x000000010942c263 -[RCTBridge initWithDelegate:bundleURL:moduleProvider:launchOptions:] + 387 8 AwesomeProject 0x000000010942c072 -[RCTBridge initWithBundleURL:moduleProvider:launchOptions:] + 146 9 AwesomeProject 0x000000010938d077 -[RCTRootView initWithBundleURL:moduleName:initialProperties:launchOptions:] + 183 10 AwesomeProject 0x0000000109376585 -[AppDelegate application:didFinishLaunchingWithOptions:] + 245 11 UIKit 0x000000010d33e0be -[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] + 290 12 UIKit 0x000000010d33fa43 -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4236 13 UIKit 0x000000010d345de9 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1731 14 UIKit 0x000000010d342f69 -[UIApplication workspaceDidEndTransaction:] + 188 15 FrontBoardServices 0x0000000110867723 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24 16 FrontBoardServices 0x000000011086759c -[FBSSerialQueue _performNext] + 189 17 FrontBoardServices 0x0000000110867925 -[FBSSerialQueue _performNextFromRunLoopSource] + 45 18 CoreFoundation 0x000000010ad71311 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 19 CoreFoundation 0x000000010ad5659c __CFRunLoopDoSources0 + 556 20 CoreFoundation 0x000000010ad55a86 __CFRunLoopRun + 918 21 CoreFoundation 0x000000010ad55494 CFRunLoopRunSpecific + 420 22 UIKit 0x000000010d3417e6 -[UIApplication _run] + 434 23 UIKit 0x000000010d347964 UIApplicationMain + 159 24 AwesomeProject 0x000000010937695f main + 111 25 libdyld.dylib 0x000000010ed1e68d start + 1 ) libc++abi.dylib: terminating with uncaught exception of type NSException (lldb) </code></pre> <p>The content of <code>AppDelegate.m</code></p> <pre><code>/** * Copyright (c) 2015-present, Facebook, Inc. * All rights reserved. * * This source code is licensed under the BSD-style license found in the * LICENSE file in the root directory of this source tree. An additional grant * of patent rights can be found in the PATENTS file in the same directory. */ #import "AppDelegate.h" #import "RCTBundleURLProvider.h" #import "RCTRootView.h" @implementation AppDelegate - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { NSURL *jsCodeLocation; jsCodeLocation = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index.ios" fallbackResource:nil]; RCTRootView *rootView = [[RCTRootView alloc] initWithBundleURL:jsCodeLocation moduleName:@"AwesomeProject" 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]; return YES; } @end </code></pre>