在我的应用中,我利用UIImagePickerController录制视频。然后我将视频URL从相机胶卷保存到核心数据中,每当我想播放它时,我都会拉URL并这样做。但是,当从照片应用中删除视频时,它仍会播放几天。当它没有从照片应用程序中删除时,它仍然会在几天后删除。如何将视频保存到我的应用程序文档中,并将其保存到核心数据中?这是我目前使用的(它不起作用):
以下是无效的zip文件:http://jmp.sh/v/w4gE5SXNiRd0d7tasc3U
以下是现在可以正常运行的zip文件:http://jmp.sh/v/tzyJU3nlc1qOPI9ZzDTF
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
// Handle a movie capture
if (CFStringCompare((__bridge_retained CFStringRef)mediaType, kUTTypeMovie, 0) == kCFCompareEqualTo) {
NSString *moviePath = [NSString stringWithFormat:@"%@", [[info objectForKey:UIImagePickerControllerMediaURL] path]];
NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];
NSData *videoData = [NSData dataWithContentsOfURL:videoURL];
AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
_managedObjectContext = [appDelegate managedObjectContext];
Video *video = [NSEntityDescription insertNewObjectForEntityForName:@"Video" inManagedObjectContext:_managedObjectContext];
[video setVideoData:videoData];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
int random = arc4random() % 1000;
//[documentsDirectory stringByAppendingFormat:@"/vid1.mp4"]
NSString *tempPath = [documentsDirectory stringByAppendingPathComponent: [NSString stringWithFormat:@"vid%d%@%@.mp4", random, self.currentAthlete.first, self.currentAthlete.last]];
BOOL success = [videoData writeToFile:tempPath atomically:NO];
if (success == FALSE) {
NSLog(@"Video was not successfully saved.");
}
else{
[video setVideoURL:[NSString stringWithFormat:@"%@", tempPath]];
}
NSError *error = nil;
if (![_managedObjectContext save:&error]) {
}
if (UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(moviePath)) {
UISaveVideoAtPathToSavedPhotosAlbum(moviePath, self,
@selector(video:didFinishSavingWithError:contextInfo:), nil);
}
}
[self dismissViewControllerAnimated:YES completion:nil];
}
答案 0 :(得分:5)
核心数据本身。
等等,在您声称不应该直接将大型二进制对象存储到Core Data Store之前,我同意。你不应该。
但是,如果文件很大,Core Data中有一个选项可以使用外部存储来存储二进制数据。
现在,如果文件很大,Core Data将负责保存文件并存储URL。
保存您管理数据文件。
答案 1 :(得分:3)
不要创建这样的路径:
NSString *tempPath = [NSString stringWithFormat:@"%@/vid%d%@%@.mp4", documentsDirectory, random, self.currentAthlete.first, self.currentAthlete.last];
像这样创建:
NSString *tempPath = [documentsDirectory stringByAppendingPathComponent: [NSString stringWithFormat:@"vid%d%@%@.mp4", random, self.currentAthlete.first, self.currentAthlete.last]];
答案 2 :(得分:0)
此代码将NSData对象写入文档目录(您可以更喜欢其他位置)并指定其URL,然后将相同的URL保存到核心数据。
(H)
@property (nonatomic, retain) NSData *data;
(。m)
NSString *docsDir;
NSArray *dirPaths;
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
NSString *databasePath = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent:[@"video_" stringByAppendingString:[NSString stringWithFormat: @"%d.mp4", 0]]]];
[self.data writeToFile:databasePath atomically:YES];
NSURL *videoURL = [NSURL fileURLWithPath:databasePath];
if(videoURL)
{
//save url to core data
}