ios - 确定 Facebook 应用程序是否从 Unity 安装

Question

我们正在使用 Facebook SDK for Unity (v6.0)，现在我想知道是否有一种方法可以检查设备上是否安装了 Facebook 应用。

原因是 Facebook SDK 中存在错误(参见此处:bug)

我想识别这种情况(仅在安装 FB 应用程序时发生)，并做出相应的 react 。

Answer 1

"In order to use a native plugin you firstly need to write functions in a C-based language to access whatever features you need and compile them into a library. In Unity, you will also need to create a C# script which calls functions in the native library." from http://docs.unity3d.com/Manual/NativePlugins.html

因此，基本上您需要在 Objective-C 中编写代码并提供 Unity 和 native 代码之间的通信。

检查Facebook APP需要实现的代码是；

(void) checkFacebookApp
{
   if ([[UIApplication sharedApplication] canOpenURL:[NSURLURLWithString:@"fb://"]])   
   {
      return true;
   }
}

但是，您需要在 Unity 和 Xcode 项目之间进行一些通信。所以;

 class SomeScript : MonoBehaviour {

   #if UNITY_IPHONE || UNITY_XBOX360

   // On iOS and Xbox 360 plugins are statically linked into
   // the executable, so we have to use __Internal as the
   // library name.
   [DllImport ("__Internal")]

   #else

   // Other platforms load plugins dynamically, so pass the name
   // of the plugin's dynamic library.
   [DllImport ("PluginName")]

   #endif

   private static extern float checkFacebookApp ();

   void Awake () {
      // Calls the FooPluginFunction inside the plugin
      // And prints 5 to the console
      bool check = checkFacebookApp ();
   }
}