RCTBridge委派中的'NSInternalInconsistencyException‘失败- React Native

Question

描述

我已经成功地使用XCode 8构建了一个react-native项目，但应用程序在构建后崩溃，并显示以下错误消息。我已经尝试了所有的方法，但都没有效果，而且似乎没有类似的问题。我认为问题出在RCTBridge.m中：

- (Class)bridgeClass
{
  // In order to facilitate switching between bridges with only build
  // file changes, this uses reflection to check which bridges are
  // available.  This is a short-term hack until RCTBatchedBridge is
  // removed.

  Class batchedBridgeClass = objc_lookUpClass("RCTBatchedBridge");
  Class cxxBridgeClass = objc_lookUpClass("RCTCxxBridge");

  Class implClass = nil;

  if ([self.delegate respondsToSelector:@selector(shouldBridgeUseCxxBridge:)]) {
    if ([self.delegate shouldBridgeUseCxxBridge:self]) {
      implClass = cxxBridgeClass;
    } else {
      implClass = batchedBridgeClass;
    }
  } else if (batchedBridgeClass != nil) {
    implClass = batchedBridgeClass;
  } else if (cxxBridgeClass != nil) {
    implClass = cxxBridgeClass;
  }

  RCTAssert(implClass != nil, @"No bridge implementation is available, giving up.");
  return implClass;
}

其中，bridgeClass返回断言错误，原因是在RCTBatchedBridge类和RCTCxxBridge之间进行了选择，两者都不返回，如下面RCTBridgeDelegate.h中的注释所述

/**
 * Configure whether the legacy RCTBatchedBridge or new RCTCxxBridge
 * should be used.  If this method is implemented and the specified
 * bridge is not linked in, startup will fail.  If this method is not
 * implemented, the implementation will default to RCTBatchedBridge,
 * but if it is not linked in, will try RCTCxxBridge instead.  If
 * neither bridge is linked in, startup will fail.  This order will be
 * reversed in the near future, as the legacy bridge is closer to
 * being removed.
 *
 * @experimental
 */
- (BOOL)shouldBridgeUseCxxBridge:(RCTBridge *)bridge;

再现步骤和示例代码

所有涉及的RN模块都已安装，并与npm和CocoaPods链接等。没有以前的生成错误，并且生成处于调试模式。我也一直在使用Ignite样板，但从日志中看，它还没有转到应用程序特定的代码中。

构建成功后的错误：

2017-06-06 08:48:57.019 rn_irnext_demo[16376:122081] *** Assertion failure in -[RCTBridge bridgeClass](), myApp/node_modules/react-native/React/Base/RCTBridge.m:292
2017-06-06 08:48:57.031 rn_irnext_demo[16376:122081] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'No bridge implementation is available, giving up.'
*** First throw call stack:
(
    0   CoreFoundation                      0x0000000113344b0b __exceptionPreprocess + 171
    1   libobjc.A.dylib                     0x0000000112da9141 objc_exception_throw + 48
    2   CoreFoundation                      0x0000000113348cf2 +[NSException raise:format:arguments:] + 98
    3   Foundation                          0x000000011297869f -[NSAssertionHandler handleFailureInFunction:file:lineNumber:description:] + 165
    4   rn_irnext_demo                      0x000000010e578e27 -[RCTBridge bridgeClass] + 535
    5   rn_irnext_demo                      0x000000010e578f7d -[RCTBridge setUp] + 285
    6   rn_irnext_demo                      0x000000010e578387 -[RCTBridge initWithDelegate:bundleURL:moduleProvider:launchOptions:] + 375
    7   rn_irnext_demo                      0x000000010e5781a2 -[RCTBridge initWithBundleURL:moduleProvider:launchOptions:] + 146
    8   rn_irnext_demo                      0x000000010e54fee7 -[RCTRootView initWithBundleURL:moduleName:initialProperties:launchOptions:] + 183
    9   rn_irnext_demo                      0x000000010e540c58 -[AppDelegate application:didFinishLaunchingWithOptions:] + 280
    10  UIKit                               0x0000000111008957 -[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] + 299
    11  UIKit                               0x000000011100a23c -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4119
    12  UIKit                               0x0000000111010584 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1709
    13  UIKit                               0x000000011100d793 -[UIApplication workspaceDidEndTransaction:] + 182
    14  FrontBoardServices                  0x000000011a3775f6 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24
    15  FrontBoardServices                  0x000000011a37746d -[FBSSerialQueue _performNext] + 186
    16  FrontBoardServices                  0x000000011a3777f6 -[FBSSerialQueue _performNextFromRunLoopSource] + 45
    17  CoreFoundation                      0x00000001132eac01 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    18  CoreFoundation                      0x00000001132d00cf __CFRunLoopDoSources0 + 527
    19  CoreFoundation                      0x00000001132cf5ff __CFRunLoopRun + 911
    20  CoreFoundation                      0x00000001132cf016 CFRunLoopRunSpecific + 406
    21  UIKit                               0x000000011100c02f -[UIApplication _run] + 468
    22  UIKit                               0x00000001110120d4 UIApplicationMain + 159
    23  rn_irnext_demo                      0x000000010e54103f main + 111
    24  libdyld.dylib                       0x00000001139cb65d start + 1
    25  ???                                 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

另外还会生成一个Thread 1:signal SIGABRT error in the main.m file.

其他信息：

1) XCode 8 2) react-native: 0.44 3) macOSx

在解决这个问题上需要帮助。提前感谢您的帮助！