unity iOS分享视频到Facebook、Tik Tok

Facebook提供的unity插件，关于分享部分的功能，只提供了分享好友和ShareApplinks，并没有提供其他的分享，比如分享视频。
正好最近的项目有分享视频到facebook和分享到Tik Tok的功能，1.检测相关权限，2.复制相关视频到相册目录3.分享视频到对应平台。
相关代码如下，贴出来与大家共享，可参考实现自己的功能。

1. 引入头文件

#import <AssetsLibrary/AssetsLibrary.h>
#import "FBSDKShareVideo.h"
#import "FBSDKShareVideoContent.h"
#import "FBSDKShareDialog.h"
#import "FBSDKHashtag.h"
#import <TikTokOpenSDK/TikTokOpenSDKShare.h>

2. 回调unity方法

/// unity回调
/// @param methodName unity方法名
/// @param message 参数字符串
- (void)SendMessage:(NSString*)methodName message:(NSString*)message
{
    NSLog(@"message->%@",message);
    NSLog(@"methodName->%@", methodName);
    UnitySendMessage("GameLaunch", [methodName UTF8String], [message UTF8String]);
}

3. 申请相册权限

-(void)GetAlbumPermissions:(NSString*)title message:(NSString*)message confirm:(NSString*)confirm cancel:(NSString*)cancel{
    PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus];
       if (status == PHAuthorizationStatusAuthorized) {
           [self SendMessage:@"IosAlbumPermission" message:@"1"];
           return;
       }
       if (status == PHAuthorizationStatusRestricted || status == PHAuthorizationStatusDenied) {
           [self SendMessage:@"IosAlbumPermission" message:@"0"];
           
           dispatch_async(dispatch_get_main_queue(), ^{
               UIAlertController *alertController = [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert];
           UIAlertAction *okAction = [UIAlertAction actionWithTitle:confirm style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
                       [[UIApplication sharedApplication]openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];
           }];
           UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:cancel style:UIAlertActionStyleDefault handler:nil];
           [alertController addAction:cancelAction];
           [alertController addAction:okAction];
                       
           UIViewController *viewController = [[[[UIApplication sharedApplication] delegate] window] rootViewController];
           if (viewController.presentedViewController && !viewController.presentedViewController.isBeingDismissed ) {
               viewController = viewController.presentedViewController;
           }

           NSLayoutConstraint *constraint = [NSLayoutConstraint
               constraintWithItem:alertController.view
               attribute:NSLayoutAttributeHeight
               relatedBy:NSLayoutRelationLessThanOrEqual
               toItem:nil
               attribute:NSLayoutAttributeNotAnAttribute
               multiplier:1
               constant:viewController.view.frame.size.height*2.0f];

               [alertController.view addConstraint:constraint];
               [viewController presentViewController:alertController animated:YES completion:^{}];
           });
           return ;
       }
       
       if (status == PHAuthorizationStatusNotDetermined) {
           [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
               // 回调是在子线程的
               NSLog(@"%@",[NSThread currentThread]);
               dispatch_async(dispatch_get_main_queue(), ^{
                   if (status != PHAuthorizationStatusAuthorized) {
                         NSLog(@"未开启相册权限,请到设置中开启");
                        [self SendMessage:@"IosAlbumPermission" message:@"0"];
                         return ;
                     }
                   [self SendMessage:@"IosAlbumPermission" message:@"1"];
               });
     
           }];
       }
}

4. 保存视频到相册目录(videoPath由unity提供)

- (void) SaveVideoToPhotoAlbum:(NSString*) videoPath {
    PHPhotoLibrary *photoLibrary = [PHPhotoLibrary sharedPhotoLibrary];
    [photoLibrary performChanges:^{
        [PHAssetChangeRequest creationRequestForAssetFromVideoAtFileURL:[NSURL fileURLWithPath:videoPath]];
    } completionHandler:^(BOOL success, NSError * _Nullable error) {
        if (success) {
            NSLog(@"已保存视频到相册");
        } else {
            NSLog(@"未能保存视频到相册");
        }
    }];
}

5. 获取相册视频（可根据自己需求，获取对应的视频文件）

/// 获取相册中最后一个视频
/// - Returns: 视频信息
- (PHAsset*) getLastVideo{
    PHAssetCollection *cameraRoll = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeSmartAlbumUserLibrary options:nil].lastObject;
    // 相机胶卷相簿存储到数组
    PHFetchResult<PHAsset *> *albumAssets = [PHAsset fetchAssetsInAssetCollection:cameraRoll options:nil];
    PHAsset *videoAsset;
    for(PHAsset *asset in albumAssets){
        int fileType = (int)asset.mediaType;
        if(fileType == PHAssetMediaTypeVideo)
        {
            videoAsset = asset;
        }
    }
    return videoAsset;
}

6. facebook分享

- (void) FBShareVideo:(NSString*) shareTag
{
    PHAsset *videoAsset = [self getLastVideo];
    NSArray *array = [videoAsset.localIdentifier componentsSeparatedByString:@"/"];
    NSString* assetStr = [NSString stringWithFormat:@"assets-library://asset/asset.mp4?id=%@&ext=mp4",[array objectAtIndex:0]];
    NSURL* assetURL = [NSURL URLWithString:assetStr];
    FBSDKShareVideo *video = [[FBSDKShareVideo alloc] init];
    if (@available(iOS 11, *)) {
        video.videoAsset = videoAsset;
    }else{
        video.videoURL = assetURL;
    }
    //调用fb的弹窗分享
    FBSDKShareVideoContent *content = [[FBSDKShareVideoContent alloc] init];
    content.video = video;
    FBSDKHashtag* hashTag = [FBSDKHashtag hashtagWithString:shareTag];
    content.hashtag = hashTag;
    FBSDKShareDialog *dialog = [[FBSDKShareDialog alloc] init];
    dialog.shareContent = content;
    dialog.fromViewController = UnityGetGLViewController();
    dialog.delegate = self;
    dialog.mode = FBSDKShareDialogModeNative;

    BOOL state = [dialog show];
    NSLog(@"assetURL is %@", assetURL);
    NSLog(@"FBSDKShareDialog state %i", state);
}

7. facebook分享回调

- (void)sharer:(id<FBSDKSharing>)sharer didCompleteWithResults :(NSDictionary*)results {
    NSLog(@"FB: SHARE RESULTS=%@\n",[results debugDescription]);
    bool complete = [results objectForKey:@"didComplete"];
    if(complete){
        [self SendMessage:@"ShareVideoResult" message:@"0|1|null"];
    }
}
 
- (void)sharer:(id<FBSDKSharing>)sharer didFailWithError:(NSError *)error {
    NSLog(@"FB: ERROR=%@\n",[error debugDescription]);
    NSString* msg = [NSString stringWithFormat:@"0|0|error:%@",[error debugDescription]];
    [self SendMessage:@"ShareVideoResult" message:msg];
}

- (void)sharerDidCancel:(id<FBSDKSharing>)sharer {
    NSLog(@"FB: CANCELED SHARER=%@\n",[sharer debugDescription]);
    [self SendMessage:@"ShareVideoResult" message:@"0|0|cancel"];
}

8. Tik Tok分享

- (void) TikTokShareVideo
{
    PHAsset *videoAsset = [self getLastVideo];
    NSMutableArray<NSString *> *mediaLocalIdentifiers = [NSMutableArray array];
    [mediaLocalIdentifiers addObject:videoAsset.localIdentifier];
    TikTokOpenSDKShareRequest *req = [[TikTokOpenSDKShareRequest alloc] init];
    req.mediaType = TikTokOpenSDKShareMediaTypeVideo;
    req.localIdentifiers = [mediaLocalIdentifiers copy];
    req.landedPageType = TikTokOpenSDKLandedPageClip;
    [req sendShareRequestWithCompletionBlock:^(TikTokOpenSDKShareResponse * _Nonnull Response) {
        if(Response.errCode==0){
            NSLog(@"分享成功");
            [self SendMessage:@"ShareVideoResult" message:@"1|1|null"];
        }else{
            NSLog(@"分享失败，错误码：%li",Response.errCode);
            NSLog(@"分享失败，shareState：%li",Response.shareState);
            NSString* msgTemp = [NSString stringWithFormat:@"1|0|errorCode:%li,shareState:%li",Response.errCode,Response.shareState];
            [self SendMessage:@"ShareVideoResult" message:msgTemp];
        }
    }];
}