音楽ファイルに関する質問があります。iOSライブラリから音楽を選択して送信/保存する
iPhone/iTouch/iPadの音楽ライブラリから1つ以上の音楽ファイルを選択し、[マイドキュメント]フォルダに保存するか、またはサーバーに送信します。
おおよそMPMediaPickerControllerとAddMusic(Sample Code)です。 しかし、私はソングを選んで演奏することの詳細しか得ることができませんでした。
選択した曲を保存します。私はサーバーに送信することもできますか？
おかげ
それは私もサーバーに送信するために使用することができ、それらの選択した曲を、保存することは可能ですか？
いいえ、iTunesライブラリからのみ曲を再生できます。
おそらく著作権保護のために、生のオーディオファイルにアクセスできません。
はい、可能です。
は、私はそれはあなたが
// Have to add this framework
//CoreMedia.framework
//AudioToolbox.framework
//CoreAudio.framework
//MediaPlayer.framework
//AVFoundation.framework
//in UploadAudioViewController.h file
#import <UIKit/UIKit.h>
#import <CoreAudio/CoreAudioTypes.h>
#import <AudioToolbox/AudioToolbox.h>
#import <MediaPlayer/MediaPlayer.h>
#import <AVFoundation/AVFoundation.h>
#import <CoreMedia/CoreMedia.h>
@interface UploadAudioViewController : UIViewController<UIActionSheetDelegate,UINavigationControllerDelegate,UIImagePickerControllerDelegate,MPMediaPickerControllerDelegate,AVAudioRecorderDelegate, AVAudioPlayerDelegate,AVAudioSessionDelegate>{
MPMediaItem *song;
NSURL *exportURL;
}
@property (nonatomic, retain) NSData *audioData;
// in UploadAudioViewController.m file
#import "UploadAudioViewController.h"
//#import < AudioToolbox/AudioToolbox.h>
@interface UploadAudioViewController()
@end
@implementation UploadAudioViewController
@synthesize musicPlayer,audioData;
-(id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
-(void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
self.title = @"Upload Audio";
self.musicPlayer = [MPMusicPlayerController iPodMusicPlayer];
self.audioData=nil;
}
#pragma mark Browse Audio from Device
-(void)PickAudioForIndex_iPhone
{
if ([[[UIDevice currentDevice] model] isEqualToString:@"iPhone Simulator"]) {
//device is simulator
UIAlertView *alert1;
alert1 = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"There is no Audio file in the Device" delegate:self cancelButtonTitle:nil otherButtonTitles:@"Ok",nil];
alert1.tag=2;
[alert1 show];
//[alert1 release],alert1=nil;
}else{
MPMediaPickerController *mediaPicker = [[MPMediaPickerController alloc] initWithMediaTypes:MPMediaTypeMusic];
mediaPicker.delegate = self;
mediaPicker.allowsPickingMultipleItems = NO; // this is the default
[self presentViewController:mediaPicker animated:YES completion:nil];
}
}
#pragma mark Media picker delegate methods
-(void)mediaPicker:(MPMediaPickerController *)mediaPicker didPickMediaItems:(MPMediaItemCollection *)mediaItemCollection {
// We need to dismiss the picker
[self dismissViewControllerAnimated:YES completion:nil];
// Assign the selected item(s) to the music player and start playback.
if ([mediaItemCollection count] < 1) {
return;
}
song = [[mediaItemCollection items] objectAtIndex:0];
[self handleExportTapped];
}
-(void)mediaPickerDidCancel:(MPMediaPickerController *)mediaPicker {
// User did not select anything
// We need to dismiss the picker
[self dismissViewControllerAnimated:YES completion:nil ];
}
-(void)handleExportTapped{
// get the special URL
if (! song) {
return;
}
//[self startLoaderWithLabel:@"Preparing for upload..."];
NSURL *assetURL = [song valueForProperty:MPMediaItemPropertyAssetURL];
AVURLAsset *songAsset = [AVURLAsset URLAssetWithURL:assetURL options:nil];
NSLog (@"Core Audio %@ directly open library URL %@",
coreAudioCanOpenURL (assetURL) ? @"can" : @"cannot",
assetURL);
NSLog (@"compatible presets for songAsset: %@",
[AVAssetExportSession exportPresetsCompatibleWithAsset:songAsset]);
/* approach 1: export just the song itself
*/
AVAssetExportSession *exporter = [[AVAssetExportSession alloc]
initWithAsset: songAsset
presetName: AVAssetExportPresetAppleM4A];
NSLog (@"created exporter. supportedFileTypes: %@", exporter.supportedFileTypes);
exporter.outputFileType = @"com.apple.m4a-audio";
NSString *exportFile = [myDocumentsDirectory() stringByAppendingPathComponent: @"exported.m4a"];
// end of approach 1
// set up export (hang on to exportURL so convert to PCM can find it)
myDeleteFile(exportFile);
//[exportURL release];
exportURL = [NSURL fileURLWithPath:exportFile];
exporter.outputURL = exportURL;
// do the export
[exporter exportAsynchronouslyWithCompletionHandler:^{
int exportStatus = exporter.status;
switch (exportStatus) {
case AVAssetExportSessionStatusFailed: {
// log error to text view
NSError *exportError = exporter.error;
NSLog (@"AVAssetExportSessionStatusFailed: %@", exportError);
//errorView.text = exportError ? [exportError description] : @"Unknown failure";
//errorView.hidden = NO;
//[self stopLoader];
//[self showAlertWithMessage:@"There ia an error!"];
break;
}
case AVAssetExportSessionStatusCompleted: {
NSLog (@"AVAssetExportSessionStatusCompleted");
//fileNameLabel.text = [exporter.outputURL lastPathComponent];
// set up AVPlayer
//[self setUpAVPlayerForURL: exporter.outputURL];
///////////////// get audio data from url
//[self stopLoader];
//[self showAlertWithMessage:@"There ia an error!"];
NSURL *audioUrl = exportURL;
NSLog(@"Audio Url=%@",audioUrl);
self.audioData = [NSData dataWithContentsOfURL:audioUrl];
break;
}
case AVAssetExportSessionStatusUnknown: {
NSLog (@"AVAssetExportSessionStatusUnknown");
//[self stopLoader];
//[self showAlertWithMessage:@"There ia an error!"];
break;
}
case AVAssetExportSessionStatusExporting: {
NSLog (@"AVAssetExportSessionStatusExporting");
//[self stopLoader];
//[self showAlertWithMessage:@"There ia an error!"];
break;
}
case AVAssetExportSessionStatusCancelled: {
NSLog (@"AVAssetExportSessionStatusCancelled");
//[self stopLoader];
//[self showAlertWithMessage:@"There ia an error!"];
break;
}
case AVAssetExportSessionStatusWaiting: {
NSLog (@"AVAssetExportSessionStatusWaiting");
//[self stopLoader];
//[self showAlertWithMessage:@"There ia an error!"];
break;
}
default: {
NSLog (@"didn't get export status");
//[self stopLoader];
//[self showAlertWithMessage:@"There ia an error!"];
break;
}
}
}];
}
#pragma mark conveniences
NSString* myDocumentsDirectory(){
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
return [paths objectAtIndex:0];;
}
void myDeleteFile (NSString* path){
if ([[NSFileManager defaultManager] fileExistsAtPath:path]) {
NSError *deleteErr = nil;
[[NSFileManager defaultManager] removeItemAtPath:path error:&deleteErr];
if (deleteErr) {
NSLog (@"Can't delete %@: %@", path, deleteErr);
}
}
}
// generic error handler from upcoming "Core Audio" book (thanks, Kevin!)
// if result is nonzero, prints error message and exits program.
static void CheckResult(OSStatus result, const char *operation)
{
if (result == noErr) return;
char errorString[20];
// see if it appears to be a 4-char-code
*(UInt32 *)(errorString + 1) = CFSwapInt32HostToBig(result);
if (isprint(errorString[1]) && isprint(errorString[2]) && isprint(errorString[3]) && isprint(errorString[4])) {
errorString[0] = errorString[5] = '\'';
errorString[6] = '\0';
} else
// no, format it as an integer
sprintf(errorString, "%d", (int)result);
fprintf(stderr, "Error: %s (%s)\n", operation, errorString);
exit(1);
}
#pragma mark core audio test
BOOL coreAudioCanOpenURL (NSURL* url){
OSStatus openErr = noErr;
AudioFileID audioFile = NULL;
openErr = AudioFileOpenURL((__bridge CFURLRef) url,
kAudioFileReadPermission ,
0,
&audioFile);
if (audioFile) {
AudioFileClose (audioFile);
}
return openErr ? NO : YES;
}
URLはありません..... – jjxtra
ありがとうございます。できます。私は、エクスポートセッションのために間違ったプリセットを与えていました。 –
私が試したとiPodライブラリの曲をエクスポートすることに成功しているのに役立ちますと思います。私のコードは以下の通りです：
extension AudioPostViewController: MPMediaPickerControllerDelegate {
func mediaPicker(mediaPicker: MPMediaPickerController, didPickMediaItems mediaItemCollection: MPMediaItemCollection) {
dismissViewControllerAnimated(true, completion: {
print("You selected \(mediaItemCollection)")
let item: MPMediaItem = mediaItemCollection.items[0]
let pathURL: NSURL? = item.valueForProperty(MPMediaItemPropertyAssetURL) as? NSURL
if pathURL == nil {
Alert.showPopupWithMessage("Unable to read DRM protected file.")
return
}
let title = item.valueForProperty(MPMediaItemPropertyTitle) as? String ?? "Now Playing..."
print("\(pathURL), title : \(title) ")
// get file extension andmime type
let str = pathURL!.absoluteString
let str2 = str.stringByReplacingOccurrencesOfString("ipod-library://item/item", withString: "")
let arr = str2.componentsSeparatedByString("?")
var mimeType = arr[0]
mimeType = mimeType.stringByReplacingOccurrencesOfString(".", withString: "")
// Export the ipod library as .m4a file to local directory for remote upload
let exportSession = AVAssetExportSession(asset: AVAsset(URL: pathURL!), presetName: AVAssetExportPresetAppleM4A)
exportSession?.shouldOptimizeForNetworkUse = true
exportSession?.outputFileType = AVFileTypeAppleM4A
FilePath.removeAudioFile() // Remove file if it exists
let fileUrl = FilePath.testFilePathURL()
exportSession?.outputURL = fileUrl
exportSession?.exportAsynchronouslyWithCompletionHandler({() -> Void in
if exportSession!.status == AVAssetExportSessionStatus.Completed {
dispatch_async(dispatch_get_main_queue(), {
// Prepare audio to play
self.audioTitle = title
self.audioPath = fileUrl
self.mimeType = "audio/m4a"
self.audioFileName = "audio.m4a"
UIView.animateWithDuration(0.45, animations: {
if Platform.DeviceType.iPhone4 {
self.libraryBottomSpacing.constant = 5
self.view.layoutIfNeeded()
} else {
self.libraryBottomSpacing.constant = 25
self.view.layoutIfNeeded()
}
}, completion: {
(v: Bool) in
self.loadJukeBox(self.audioPath!, title: title)
})
})
} else {
dispatch_async(dispatch_get_main_queue(), {
Alert.showPopupWithMessage("Unable to read file as its DRM protected.")
})
}
})
})
}
func mediaPickerDidCancel(mediaPicker: MPMediaPickerController) {
dismissViewControllerAnimated(true, completion: nil)
}
}
FilePathを見つけるには？私はコードとURLを表示できますか？ – HariKarthick
hehe ..私はそれについて考えています。 ） –