Unity实现IOS原生分享

   一开始我以为接入ShareSDK去实现分享功能，没想到要实现IOS的原生分享去实现这个功能。本人对OC一点都不熟悉，一脸蒙蔽。然后我开始在网上去找资料，发现一篇Unity实现IOS的截屏分享功能，然后我改一下他的源代码去实现了这个功能。代码如下（功能是实现了，但是不熟悉OC，源代码不敢修改的太多，有空再来搞）。

一 在Unity中声明OC中的函数并且调用OC函数

using System.Collections;  
using System.Collections.Generic;  
using UnityEngine;  
#if UNITY_IPHONE && !UNITY_EDITOR  
using System.Runtime.InteropServices;  
#endif  

public class GJCNativeShare : MonoBehaviour {  
	//声明OS函数
	#if UNITY_IPHONE && !UNITY_EDITOR  
	[DllImport ("__Internal")]  
	private static extern void _GJC_NativeShare(string text, string encodedMedia);  
	#endif  
	//回调的委托
	public delegate void OnShareSuccess(string platform);  
	public delegate void OnShareCancel(string platform);  

	public OnShareSuccess onShareSuccess = null;  
	public OnShareCancel onShareCancel = null;  

	//单利
	private static GJCNativeShare _instance = null;  
	public static GJCNativeShare Instance {  
		get {  
			if (_instance == null) {  
				_instance = GameObject.FindObjectOfType(typeof(GJCNativeShare)) as GJCNativeShare;  
				if (_instance == null) {  
					_instance = new GameObject ().AddComponent<GJCNativeShare> ();  
					_instance.gameObject.name = _instance.GetType ().FullName;  
				}  
			}  
			return _instance;  
		}  
	}  
	/// <summary>
	/// 调用OC函数
	/// </summary>
	public void NativeShare() {  
		Debug.Log("NativeShare");  
		#if UNITY_IPHONE && !UNITY_EDITOR  

		_GJC_NativeShare("", "");  

		#endif  
	}  

	/// <summary>
	/// 分享成功的回调
	/// </summary>
	/// <param name="result">Result.</param>
	private void OnNativeShareSuccess(string result){  
		// Debug.Log("success: " + result);  
		if (onShareSuccess!=null){  
			onShareSuccess(result);  
		}  
	}  
	/// <summary>
	/// 分享失败的回到
	/// </summary>
	/// <param name="result">Result.</param>
	private void OnNativeShareCancel(string result){  
		// Debug.Log("cancel: " + result);  
		if (onShareCancel != null){  
			onShareCancel(result);  
		}  
	}  


}  

 2 在Xcode中编写GJCSocialShare.h文件

#import <UIKit/UIKit.h>

@interface GJCSocialShare : NSObject

+ (id) sharedInstance;

- (void) nativeShare:(NSString*)text media: (NSString*) media;

@end

@interface GJC_DataConvertor : NSObject

+ (NSString*) charToNSString: (char*)value;
+ (const char*) NSIntToChar: (NSInteger) value;
+ (const char*) NSStringToChar: (NSString *) value;
+ (NSArray*) charToNSArray: (char*)value;

+ (const char*) serializeErrorWithData:(NSString *)description code: (int) code;
+ (const char*) serializeError:(NSError *)error;

+ (NSMutableString *) serializeErrorWithDataToNSString:(NSString *)description code: (int) code;
+ (NSMutableString *) serializeErrorToNSString:(NSError *)error;


+ (const char*) NSStringsArrayToChar:(NSArray *) array;
+ (NSString *) serializeNSStringsArray:(NSArray *) array;

@end

 3 在Xcode中编写GJCSocialShare.mm文件

#import "GJCSocialShare.h"
#import <Social/Social.h>

NSString * const STR_SPLITTER = @"|";
NSString * const STR_EOF = @"endofline";
NSString * const STR_ARRAY_SPLITTER = @"%%%";

@implementation GJCSocialShare

static GJCSocialShare * gjc_sharedInstance;

+ (id)sharedInstance {
    
    if (gjc_sharedInstance == nil)  {
        gjc_sharedInstance = [[self alloc] init];
    }
    
    return gjc_sharedInstance;
}

-(void) nativeShare:(NSString *)text  media:(NSString *)media {
    NSLog(@"==============>nativeShare");
    
    //UIImage *shareImg = [UIImage imageNamed:@"9.jpg"];
    //  UIImage *shareImg1 = [UIImage imageNamed:@"14.jpg"];
    NSString *shareTitle = @"分享 触不到的你 下载链接";
    NSURL *shareURL = [NSURL URLWithString:@"http://www.baidu.com"];
    
    NSArray *activityItems = @[shareURL,shareTitle];
    // UIActivityViewController *activeViewController = [[UIActivityViewController alloc]initWithActivityItems:activityItems applicationActivities:nil];
    UIActivityViewController *controller;
    
    controller =[[UIActivityViewController alloc]initWithActivityItems:activityItems applicationActivities:nil];
 
    UIViewController *vc =  UnityGetGLViewController();
    
    
    NSArray *vComp = [[UIDevice currentDevice].systemVersion componentsSeparatedByString:@"."];
    if ([[vComp objectAtIndex:0] intValue] >= 8) {
        UIPopoverPresentationController *presentationController = [controller popoverPresentationController];
        presentationController.sourceView = vc.view;
        presentationController.sourceRect = CGRectMake(vc.view.bounds.origin.x+vc.view.bounds.size.width/2,
                                                       vc.view.bounds.origin.y+vc.view.bounds.size.height,
                                                       0, 0);
        presentationController.permittedArrowDirections = 0;
    }
    
    [vc presentViewController:controller animated:YES completion:nil];
    
    controller.completionWithItemsHandler = ^(UIActivityType  _Nullable activityType, BOOL completed, NSArray * _Nullable returnedItems, NSError * _Nullable activityError) {
        //        NSLog(@"activityType :%@", activityType);
        if (completed){
            //回调Unity函数
            UnitySendMessage("GJCNativeShare", "OnNativeShareSuccess", [GJC_DataConvertor NSStringToChar:activityType]);
            //            NSLog(@"completed!");
        }else{
            if (activityType != nil){
                //回调Unity函数
                UnitySendMessage("GJCNativeShare", "OnNativeShareCancel", [GJC_DataConvertor NSStringToChar:activityType]);
            }else{
                //回调Unity函数
                UnitySendMessage("GJCNativeShare", "OnNativeShareCancel", [GJC_DataConvertor NSStringToChar:@""]);
            }
            //            NSLog(@"cancel!");
        }
    };
}

@end


@implementation GJC_DataConvertor


+(NSString *) charToNSString:(char *)value {
    if (value != NULL) {
        return [NSString stringWithUTF8String: value];
    } else {
        return [NSString stringWithUTF8String: ""];
    }
}

+(const char*)NSIntToChar:(NSInteger)value {
    NSString *tmp = [NSString stringWithFormat:@"%ld", (long)value];
    return [tmp UTF8String];
}

+ (const char*) NSStringToChar:(NSString *)value {
    return [value UTF8String];
}

+ (NSArray *)charToNSArray:(char*)value {
    NSString* strValue = [GJC_DataConvertor charToNSString:value];
    
    NSArray *array;
    if([strValue length] == 0) {
        array = [[NSArray alloc] init];
    } else {
        array = [strValue componentsSeparatedByString:STR_ARRAY_SPLITTER];
    }
    
    return array;
}

+ (const char*) NSStringsArrayToChar:(NSArray *) array {
    return [GJC_DataConvertor NSStringToChar:[GJC_DataConvertor serializeNSStringsArray:array]];
}

+ (NSString *) serializeNSStringsArray:(NSArray *) array {
    
    NSMutableString * data = [[NSMutableString alloc] init];
    
    
    for(NSString* str in array) {
        [data appendString:str];
        [data appendString: STR_ARRAY_SPLITTER];
    }
    
    [data appendString: STR_EOF];
    
    NSString *str = [data copy];
#if UNITY_VERSION < 500
    [str autorelease];
#endif
    
    return str;
}


+ (NSMutableString *)serializeErrorToNSString:(NSError *)error {
    NSString* description = @"";
    if(error.description != nil) {
        description = error.description;
    }
    
    return  [self serializeErrorWithDataToNSString:description code: (int) error.code];
}

+ (NSMutableString *)serializeErrorWithDataToNSString:(NSString *)description code:(int)code {
    NSMutableString * data = [[NSMutableString alloc] init];
    
    [data appendFormat:@"%i", code];
    [data appendString: STR_SPLITTER];
    [data appendString: description];
    
    return  data;
}



+ (const char*) serializeErrorWithData:(NSString *)description code: (int) code {
    NSString *str = [GJC_DataConvertor serializeErrorWithDataToNSString:description code:code];
    return [GJC_DataConvertor NSStringToChar:str];
}

+ (const char*) serializeError:(NSError *)error  {
    NSString *str = [GJC_DataConvertor serializeErrorToNSString:error];
    return [GJC_DataConvertor NSStringToChar:str];
}

@end


extern "C" {
    void _GJC_NativeShare(char* text, char* encodedMedia) {
        NSString *status = [GJC_DataConvertor charToNSString:text];
        NSString *media = [GJC_DataConvertor charToNSString:encodedMedia];
        
        [[GJCSocialShare sharedInstance] nativeShare:status media:media];
    }
}

 4 然后将写好的.h和.mm文件导入到Unity中Plugins文件中，并且勾上Social Framework dependences 这个库。