iOS反应本机-导航不'；不能使用本机代码 我正试图使多个框架在IOS环境中协同工作，而在尝试使用由原生Read（RN）触发的本机方法时，我被卡住了。

尝试了多种方法后（其中一种方法是公开

rootViewController

并更改触发方法中的

UIViewController

），即使调用该方法，我也无法更改视图控制器

我将在下面留下一些我尝试过的代码，希望能更好地解释我正在尝试做什么

免责声明：我是obj-c的初学者，也是iOS开发的完整noob-随学随用

这是我的

AppDelegate

实现：

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  [super applicationDidFinishLaunching:application];  

  NSURL *jsCodeLocation;

  jsCodeLocation = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index.ios" fallbackResource:nil];

  RCTRootView *rootView = [[RCTRootView alloc] initWithBundleURL:jsCodeLocation
                                                      moduleName:@"SomethingMobile"
                                               initialProperties:nil
                                                   launchOptions:launchOptions];
  rootView.backgroundColor = [[UIColor alloc] initWithRed:1.0f green:1.0f blue:1.0f alpha:1];

  UIViewController *rootViewController = [[UIViewController alloc] init];
  rootViewController.view = rootView;


  self.navigationController = [[UINavigationController alloc] initWithRootViewController:   rootViewController];
  [self.window setRootViewController:self.navigationController];

//--- style the UINavigationController
  self.navigationController.navigationBar.barStyle = UIBarStyleBlackTranslucent;
  self.navigationController.navigationBar.topItem.title = @"Home";

  return YES;
}

-(void) changeView {
 // SimpleViewController is a valid UIViewController that I tested separately and it works
  [self.navigationController pushViewController:[[SimpleViewController alloc] init] animated:YES];
  self.navigationController.navigationBar.topItem.title = @"OF";
  printf("Got here");
}

@end

- (dispatch_queue_t)methodQueue
{
  return dispatch_get_main_queue();
}

然后我有一个类作为RN和本机代码之间的桥梁：

@implementation OFStarter

// The React Native bridge needs to know our module
RCT_EXPORT_MODULE()

- (NSDictionary *)constantsToExport {
  return @{@"greeting": @"Welcome to native"};
}

RCT_EXPORT_METHOD(squareMe:(int)number:(RCTResponseSenderBlock)callback) {

  AppDelegate *delegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
  [delegate changeView]; // this is getting called when I press a button in the RN view
  callback(@[[NSNull null], [NSNumber numberWithInt:(number*number)]]);
}

@end

现在由于某种我不知道的原因，当调用

changeView

方法时，什么都没有发生。据我所知，

pushViewController

是使用

UINavigationController

更改视图时要调用的方法

现在，如果我想在

didfishlaunchwithoptions

方法中使用与

changeView

中相同的代码行来更改视图控制器，它可以完美地工作

[self.navigationController pushview控制器：[[SimpleViewController alloc]init]动画：是]

更奇怪的是，有一次我点击RN按钮约20次，然后突然视图开始改变约20次

另外，我想提到的是，当我按下RN按钮时，
changeView
总是被调用

在这件事上，如果有任何帮助，我将不胜感激。我在这个问题上纠缠了一段时间，我很确定我可能错过了一些明显的东西。谢谢
 我终于解决了这个问题。更改ViewController时，必须从主线程执行此操作，否则它将无法按预期工作

我所需要做的就是将此方法添加到Starter的
实现中：

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  [super applicationDidFinishLaunching:application];  

  NSURL *jsCodeLocation;

  jsCodeLocation = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index.ios" fallbackResource:nil];

  RCTRootView *rootView = [[RCTRootView alloc] initWithBundleURL:jsCodeLocation
                                                      moduleName:@"SomethingMobile"
                                               initialProperties:nil
                                                   launchOptions:launchOptions];
  rootView.backgroundColor = [[UIColor alloc] initWithRed:1.0f green:1.0f blue:1.0f alpha:1];

  UIViewController *rootViewController = [[UIViewController alloc] init];
  rootViewController.view = rootView;


  self.navigationController = [[UINavigationController alloc] initWithRootViewController:   rootViewController];
  [self.window setRootViewController:self.navigationController];

//--- style the UINavigationController
  self.navigationController.navigationBar.barStyle = UIBarStyleBlackTranslucent;
  self.navigationController.navigationBar.topItem.title = @"Home";

  return YES;
}

-(void) changeView {
 // SimpleViewController is a valid UIViewController that I tested separately and it works
  [self.navigationController pushViewController:[[SimpleViewController alloc] init] animated:YES];
  self.navigationController.navigationBar.topItem.title = @"OF";
  printf("Got here");
}

@end

- (dispatch_queue_t)methodQueue
{
  return dispatch_get_main_queue();
}