IOS检测APP是否安装(插件法)

(通过获取应用的bundleID已经证明不行就不说了)
在iOS 12,以上11,10不同系统的方法是不一样的.
方法:

• (BOOL) verifyAppWithBundle:(NSString *)bundleID{
  __block BOOL isInstall = NO;

  if ([[UIDevice currentDevice].systemVersion floatValue] >= 11.0) {

             //iOS12间接获取办法
  
       if ([[UIDevice currentDevice].systemVersion floatValue] >= 12.0){
  
           
  
                Class lsawsc = objc_getClass("LSApplicationWorkspace");
  
  
  
                NSObject* workspace = [lsawsc performSelector:NSSelectorFromString(@"defaultWorkspace")];
  
  
  
                NSArray *plugins = [workspace performSelector:NSSelectorFromString(@"installedPlugins")]; //列出所有plugins
           
                DLOG(@"installedPlugins:%@",plugins);
       
                [plugins enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
                NSString *pluginID = [obj performSelector:(@selector(pluginIdentifier))];
                    NSLog(@"pluginID：%@",pluginID);
                    if([pluginID containsString:bundleID]){
                        isInstall = YES;
                        return;
                    }
           }];
  
           return isInstall;
  
       }else{
               //iOS11获取办法
               NSBundle *container = [NSBundle bundleWithPath:@"/System/Library/PrivateFrameworks/MobileContainerManager.framework"];
  
               if ([container load]) {
  
                     Class appContainer = NSClassFromString(@"MCMAppContainer");
  
                     id test = [appContainer performSelector:@selector(containerWithIdentifier:error:) withObject:bundleID withObject:nil];
  
                     NSLog(@"%@",test);
  
                     if (test) {
                          return YES;
                      } else {
                          return NO;
                        }
  
                }else{
                    return NO;
                }
  
           }
  
   }else{
  
   //iOS10及以下获取办法
       Class lsawsc = objc_getClass("LSApplicationWorkspace");
  
       NSObject* workspace = [lsawsc performSelector:NSSelectorFromString(@"defaultWorkspace")];
  
       NSArray *appList = [workspace performSelector:@selector(allApplications)];
  
       Class LSApplicationProxy_class = object_getClass(@"LSApplicationProxy");
  
       for (LSApplicationProxy_class in appList)
  
       {
          //这里可以查看一些信息
  
           NSString *bundleID = [LSApplicationProxy_class performSelector:@selector(applicationIdentifier)];
  
           NSString *version =  [LSApplicationProxy_class performSelector:@selector(bundleVersion)];
  
           NSString *shortVersionString =  [LSApplicationProxy_class performSelector:@selector(shortVersionString)];
  
           if ([bundleID isEqualToString:bundleID]) {
               return  YES;
           }
       }
       return NO;
  
   }
  

  return NO;

}

问题一:
如何判断自己应用的插件(自己先开发一个就行很好开发的)
问题二:
私有Api能否上架,可以通过热更新的方式下发,或者通过混淆处理.(热更好了)