我不熟悉Objecticve-C。我正在使用它，因为我想本地/正确检查ios上是否安装了应用程序。我找到了Objective-C片段，看看是否安装了一个应用程序并理解需要一个C-wrapper来基本上与Objective-C脚本（mm文件）进行统一对话。只是不明白如何让C-wrapper获取我在mm脚本中的Objective-C值。
// UnityPluginTest-1.mm
//
// Created by OJ on 7/13/16.
//
#import <Foundation/Foundation.h>
@interface SampleClass:NSObject
/* method declaration */
- (BOOL)isFBInstalledX;
@end
@implementation SampleClass
//Objective-C value I want
- (BOOL)isFBInstalledX {
return [[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"fb://"]];
}
@end
//C-wrapper that talks to Unity
extern "C"
{
bool isFBInstalled(){
// Need to get the Objective C BOOL value from above, my c# script will get this value once retrieved
//return -(Bool) isFBInstalledX value //--this doesn't work
//return ..... // I give up :(
}
}