我需要在facebook上共享一个视频,并有这个视频的文件URL,但要共享,我需要这个视频的资产URL。如何在不使用uiImagePickerViewControl的情况下从本地视频获取资源URL?
最佳答案
Facebook SDK需要资产URL,因此您必须将视频文件传递到资产库并从中获取新的URL。完整的代码看起来像:
NSURL *_videoURL = [URL to local video file];
//initilize the asset library object and define the completion block
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
ALAssetsLibraryWriteVideoCompletionBlock videoWriteCompletionBlock =
^(NSURL *newURL, NSError *error) {
if (error) {
NSLog( @"Error writing image with metadata to Photo Library: %@", error );
} else {
NSLog( @"Wrote image with metadata to Photo Library %@", newURL.absoluteString);
//share to facebook when we have new asset URL
FBSDKShareVideo *shareVideo = [[FBSDKShareVideo alloc]init];
shareVideo.videoURL = newURL;
FBSDKShareVideoContent *shareContent = [[FBSDKShareVideoContent alloc] init];
shareContent.video = shareVideo;
[FBSDKShareDialog showFromViewController:self withContent:shareContent delegate:nil];
}
};
//write video file and fire up facebook sharing diaglog when complete
if ([library videoAtPathIsCompatibleWithSavedPhotosAlbum:_videoURL])
{
[library writeVideoAtPathToSavedPhotosAlbum:_videoURL
completionBlock:videoWriteCompletionBlock];
}
已更新(对于iOS SDK 9.0+):
NSURL *_videoURL = [URL to local video file];
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
PHAssetChangeRequest *changeRequest= [PHAssetChangeRequest creationRequestForAssetFromVideoAtFileURL:_videoURL];
_videoPlaceHolder= [changeRequest placeholderForCreatedAsset];
} completionHandler:^(BOOL success, NSError * _Nullable error) {
if (error) {
NSLog( @"Error writing image with metadata to Photo Library: %@", error );
} else {
NSLog( @"Wrote image with metadata to Photo Library %@", [_videoPlaceHolder localIdentifier]);
//example for localidentifier:2BC8A8A8-E974-42D9-AD0F-2F463B353914/L0/001
NSArray *id=[_videoPlaceHolder.localIdentifier componentsSeparatedByString:@"/"];
NSString *path= [NSString stringWithFormat:@"assets-library://asset/asset.MOV?id=%@&ext=MOV",id[0]];
_videoAssetURL = [NSURL URLWithString:path];
dispatch_async(dispatch_get_main_queue(), ^{
//share to facebook
FBSDKShareVideo *shareVideo = [[FBSDKShareVideo alloc]init];
shareVideo.videoURL = _videoAssetURL;
FBSDKShareVideoContent *shareContent = [[FBSDKShareVideoContent alloc] init];
shareContent.video = shareVideo;
[FBSDKShareDialog showFromViewController:self withContent:shareContent delegate:nil];
});
}
}];
关于ios - 使用iOS SDK在Facebook上分享视频,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/43919947/