RCTBridge需要dispatch_sync才能加载RCTDevSettings。这可能会导致死锁。

Question

当我将RN从0.32升级到0.44时，react升级到16.0.0-alpha.6。当我在Xcode .I上运行应用程序时，得到以下错误：

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Answer 1

打开你的/ios/YourAppName/AppDelegate.m

#import "AppDelegate.h"

// ADD THIS
#if RCT_DEV
#import <React/RCTDevLoadingView.h>
#endif
// TILL HERE

#import <React/RCTBridge.h>
#import <React/RCTBundleURLProvider.h>
#import <React/RCTRootView.h>
...

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{

...
  RCTBridge *bridge = [[RCTBridge alloc] initWithBundleURL:jsCodeLocation
                                            moduleProvider:nil
                                             launchOptions:launchOptions];
// THIS CONDITION
#if RCT_DEV
  [bridge moduleForClass:[RCTDevLoadingView class]];
#endif
  RCTRootView *rootView = [[RCTRootView alloc] initWithBridge:bridge
                                                   moduleName:@"Test"
                                            initialProperties:nil];
// TILL HERE
  ...
}

对我很管用！源here