做一个二维码扫描功能

在 appdelegate.m里初始化了 instance单例

#import <UIKit/UIKit.h>
#import <WeexSDK/WXSDKInstance.h>
@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;
@property (strong, nonatomic) WXSDKInstance *instance;
@end

注册了module 初始化instance

 self.instance = [[WXSDKInstance alloc] init];
 [WXSDKEngine registerModule:@"scanEvent" withClass:[WXScanModule class]];

然后 module跳转扫描页面

-(void)startScan{

    UIViewController *vc = [currentView getCurrentVC];
    ScanViewController *scan = [[ScanViewController alloc] init];
    
  [vc presentViewController:[[UINavigationController alloc] initWithRootViewController:scan] animated:YES completion:nil];
    
}

最后在 ScanViewController 发送 fireGlobalEvent 扫描出了东西 weex页面接受不到这个fireGlobalEvent …

-(void)getScanDataString:(NSString*)scanDataString{
    
    NSLog(@"二维码内容：%@",scanDataString);
    AppDelegate *appDele = (AppDelegate *) [[UIApplication sharedApplication] delegate];
    [appDele.instance fireGlobalEvent:@"globalScan" params:@{@"scanInfo":scanDataString}];
 
    [self goBack];

}

大神们看看这个代码有啥问题啊~~