我正在使用以下代码捕获视频：
UIImagePickerController *ipc = [[UIImagePickerController alloc] init];
ipc.sourceType = UIImagePickerControllerSourceTypeCamera;
ipc.delegate = self;
//need to handle delegates methods
//
ipc.allowsEditing = YES;
ipc.videoQuality = UIImagePickerControllerQualityTypeMedium;
ipc.videoMaximumDuration = 30.0f; // 30 seconds
//temporary duation of 30 seconds for testing
ipc.mediaTypes = [NSArray arrayWithObject:@"public.movie"];
// ipc.mediaTypes = [NSArray arrayWithObjects:@"public.movie", @"public.image", nil];
[self presentModalViewController:ipc animated:YES];
//this controller allows to record the videos
我可以使用以下代码将录制的视频保存到相册
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
// recover video URL
NSURL *url = [info objectForKey:UIImagePickerControllerMediaURL];
// check if video is compatible with album
BOOL compatible = UIVideoAtPathIsCompatibleWithSavedPhotosAlbum([url path]);
// save
if (compatible){
UISaveVideoAtPathToSavedPhotosAlbum([url path], self, @selector(video:didFinishSavingWithError:contextInfo:), NULL);
NSLog(@"saved!!!! %@",[url path]);
}
[self dismissModalViewControllerAnimated:YES];
[picker release];
}
但我需要从相册中检索该文件并需要存储到文档目录中吗？
答案 0 :(得分：30)
将视频保存到文档目录如下：
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];
NSData *videoData = [NSData dataWithContentsOfURL:videoURL];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *tempPath = [documentsDirectory stringByAppendingFormat:@"/vid1.mp4"];
BOOL success = [videoData writeToFile:tempPath atomically:NO];
[picker dismissModalViewControllerAnimated:YES];
}
答案 1 :(得分：10)
如果有人在将来需要它，这是快速代码：
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {
let videoURL = info[UIImagePickerControllerMediaURL] as! NSURL
let videoData = NSData(contentsOfURL: videoURL)
let paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)
let documentsDirectory: AnyObject = paths[0]
let dataPath = documentsDirectory.stringByAppendingPathComponent("/vid1.mp4")
videoData?.writeToFile(dataPath, atomically: false)
self.dismissViewControllerAnimated(true, completion: nil)
}
答案 2 :(得分：4)
#pragma mark -
#pragma mark File Names and Paths
// Creates the path if it does not exist.
- (void)ensurePathAt:(NSString *)path {
NSFileManager *fm = [NSFileManager defaultManager];
if ( [fm fileExistsAtPath:path] == false ) {
[fm createDirectoryAtPath:path
withIntermediateDirectories:YES
attributes:nil
error:NULL];
}
}
- (NSString *)documentPath {
if ( ! documentPath_ ) {
NSArray *searchPaths =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
documentPath_ = [searchPaths objectAtIndex: 0];
documentPath_=[documentPath_ stringByAppendingPathComponent:@"VideoAlbum"];
[documentPath_ retain];
}
return documentPath_;
}
- (NSString *)audioPath {
if ( ! AudioPath_ ) {
AudioPath_ = [[self documentPath] stringByAppendingPathComponent:@"Demo"];
NSLog(@"%@",AudioPath_);
[AudioPath_ retain];
[self ensurePathAt:AudioPath_];
}
return AudioPath_;
}
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
NSString *type = [info objectForKey:UIImagePickerControllerMediaType];
if ([type isEqualToString:(NSString *)kUTTypeVideo] || [type isEqualToString:(NSString *)kUTTypeMovie])
{
NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];
NSData *videoData = [NSData dataWithContentsOfURL:videoURL];
tempPath = [[self audioPath] stringByAppendingFormat:@"/%@.mp4",[NSDate date]];
BOOL success = [videoData writeToFile:tempPath atomically:NO];
NSLog(@"%hhd",success);
}
[[picker presentingViewController] dismissViewControllerAnimated:YES completion:nil];
}
答案 3 :(得分：3)
R＆amp; D，这对我有用
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
NSURL *url = [info objectForKey:UIImagePickerControllerMediaURL];
// Save video to app document directory
NSString *filePath = [url path];
NSString *pathExtension = [filePath pathExtension] ;
if ([pathExtension length] > 0)
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) ;
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *localFilePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@", [filePath lastPathComponent]]];
// Method last path component is used here, so that each video saved will get different name.
NSError *error = nil ;
BOOL res = [[NSFileManager defaultManager] moveItemAtPath:filePath toPath:localFilePath error:&error] ;
if (!res)
{
NSLog(@"%@", [error localizedDescription]) ;
}
else
{
NSLog(@"File saved at : %@",localFilePath);
}
}
}
//当您必须检查app文档目录中是否存在相同的视频并且您不想创建它的多个副本时，请进行一些更改，如下所示
NSURL *url = [info objectForKey:UIImagePickerControllerMediaURL];
NSURL *videoAsset = [info objectForKey:UIImagePickerControllerReferenceURL];
__weak typeof(self) weakSelf = self;
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library assetForURL:videoAsset resultBlock:^(ALAsset *asset)
{
weakSelf.selectedFileName = [[asset defaultRepresentation] filename];
NSLog(@"Video Filename %@",weakSelf.selectedFileName);
// Save video to doc directory
NSString *filePath = [url path];
NSString *pathExtension = [filePath pathExtension] ;
if ([pathExtension length] > 0)
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) ;
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *localFilePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@", weakSelf.selectedFileName]];
//check if same video is having its copy in app directory.
//so that multiple entries of same file should not happen.
BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:localFilePath];
if (!fileExists)
{
NSError *error = nil ;
BOOL res = [[NSFileManager defaultManager] moveItemAtPath:filePath toPath:localFilePath error:&error] ;
if (!res)
{
NSLog(@"%@", [error localizedDescription]) ;
}
else
{
NSLog(@"File saved at : %@",localFilePath);
weakSelf.filePathURL = [NSURL URLWithString:localFilePath];
}
}
else
{
NSLog(@"File exist at : %@",localFilePath);
weakSelf.filePathURL = [NSURL URLWithString:localFilePath];
}
}
}
}
//其中weakSelf.selectedFileName＆amp; weakSelf.filePathURL分别是我的类的NSString和NSURL类型属性。
答案 4 :(得分：2)
我们可以使用NSFileManager的moveItemAtPath:toPath:error:方法将视频文件移动到我们应用的文档目录中。效率更高。
此外，我们应该获取视频文件的扩展名，并将其用作我们本地视频文件名的扩展名。
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
[self dismissViewControllerAnimated:YES completion:nil] ;
if ([info[UIImagePickerControllerMediaType] isEqualToString:(NSString *)kUTTypeMovie]) {
// video
NSURL *url = [info[UIImagePickerControllerMediaType] ;
NSString *filePath = [url path] ;
NSString *pathExtension = [filePath pathExtension] ;
if ([pathExtension length] > 0) {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) ;
NSString *documentsDirectory = [paths objectAtIndex:0] ;
NSString *localFilePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"temp.%@", pathExtension]] ;
NSError *error = nil ;
BOOL res = [[NSFileManager defaultManager] moveItemAtPath:filePath toPath:localFilePath error:&error] ;
if (!res) {
NSLog(@"%@", [error localizedDescription]) ;
}
}
}
}
它对我有用。
答案 5 :(得分：0)
videoUrl = [info objectForKey:UIImagePickerControllerMediaURL];
urlString=[urlvideo path];
NSLog(@"path url %@",videoUrl);
NSData *videoData = [NSData dataWithContentsOfURL:videoUrl];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *sourcePath = [documentsDirectory stringByAppendingPathComponent:@"yourfilename.mp4"];
[videoData writeToFile:sourcePath atomically:YES];
//Below code will save video to iOS Device
ALAssetsLibrary* library = [[ALAssetsLibrary alloc] init];
[library writeVideoAtPathToSavedPhotosAlbum:videoUrl
completionBlock:^(NSURL *assetURL, NSError *error){/*notify of completion*/}];
[picker dismissViewControllerAnimated:YES completion:nil];
希望这个帮助
答案 6 :(得分：0)
videoURL = info[UIImagePickerControllerMediaURL]as? NSURL
print(videoURL!)
let urlData=NSData(contentsOf: videoURL as! URL)
if((urlData) != nil)
{
let path = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
let documentDirectory = path.first! as NSString
let fileName = "Video.MOV"
let PDFPathFileName = documentDirectory.appendingPathComponent(fileName as String)
print(PDFPathFileName)
DispatchQueue.main.async( execute: {
urlData?.write(toFile: PDFPathFileName, atomically: true)
})
do {
let asset = AVURLAsset(url: videoURL as! URL , options: nil)
let imgGenerator = AVAssetImageGenerator(asset: asset)
imgGenerator.appliesPreferredTrackTransform = true
let cgImage = try imgGenerator.copyCGImage(at: CMTimeMake(0, 1), actualTime: nil)
let thumbnail = UIImage(cgImage: cgImage)
imgView.image = thumbnail
// thumbnail here
} catch let error {
print("*** Error generating thumbnail: \(error.localizedDescription)")
}
}
self.dismiss(animated: true, completion: nil)
答案 7 :(得分：0)
Swift 3/4
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) { // recover video URL let url = info[UIImagePickerControllerMediaURL] as? URL // check if video is compatible with album let compatible: Bool = UIVideoAtPathIsCompatibleWithSavedPhotosAlbum((url?.path)!) // save if compatible { UISaveVideoAtPathToSavedPhotosAlbum((url?.path)!, self, nil, nil) print("saved!!!! \(String(describing: url?.path))") } dismiss(animated: true, completion: nil) } // error func video(_ videoPath: String, didFinishSavingWithError error: Error?, contextInfo: UnsafeMutableRawPointer) { }
保存示例路径： -
"/private/var/mobile/Containers/Data/Application/EA53C844-7931-446C-800D-DA90717426BB/tmp/xxxxxx.MOV"
答案 8 :(得分：0)
只需调用此函数，它将为您完成所有事情：）
private func saveVideo(url:URL) {
DispatchQueue.global(qos: .userInitiated).async {
guard let documentsDirectoryURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first else { return }
if !FileManager.default.fileExists(atPath: documentsDirectoryURL.appendingPathComponent(url.lastPathComponent).path) {
URLSession.shared.downloadTask(with: url) { (location, response, error) -> Void in
guard let location = location else { return }
let destinationURL = documentsDirectoryURL.appendingPathComponent(response?.suggestedFilename ?? url.lastPathComponent)
do {
try FileManager.default.moveItem(at: location, to: destinationURL)
PHPhotoLibrary.requestAuthorization({ (authorizationStatus: PHAuthorizationStatus) -> Void in
if authorizationStatus == .authorized {
PHPhotoLibrary.shared().performChanges({
PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL: destinationURL)}) { completed, error in
DispatchQueue.main.async {
if completed {
self.view.makeToast(NSLocalizedString("Video Saved!", comment: "Video Saved!"), duration: 3.0, position: .center)
} else {
print(error!)
}
}
}
}
})
} catch { print(error) }
}.resume()
} else {
print("File already exists at destination url")
}
}
}