2014/10/15 下午 10:15:03

iphone Programming Glossary: tracks

Why should I use Core Data for my iPhone app?

http://stackoverflow.com/questions/1883879/why-should-i-use-core-data-for-my-iphone-app

bullet points for your boss Core Data manages save and undo functionality for you. It has a persistent store which tracks changes and can be flushed to the disk automatically at any number of times app close etc. . Core Data and related classes..

Instruments ObjectAlloc: Explanation of Live Bytes & Overall Bytes

http://stackoverflow.com/questions/2154219/instruments-objectalloc-explanation-of-live-bytes-overall-bytes

What are Transitory objects Thanks iphone objective c xcode instruments share improve this question ObjectAlloc tracks all memory allocation and deallocation over the time your program is running. The Living bytes or Net bytes is how much..

Play multiple audio files using AVAudioPlayer

http://stackoverflow.com/questions/2586284/play-multiple-audio-files-using-avaudioplayer

and stackoverflow to learn. Apple's avTouch sample application was a great start. But I want my app to play all the 10 tracks one by one. All the songs are added to resources folder and are named as track1 track2...track10. In the avTouch app code.. setCurrentTime 0. self updateViewForPlayerState can anyone please help me on 1. how to load the array with all the 10 tracks which are added to resources folder 2. and when I hit play player should start the first track. when the 1st track ends.. play player should start the first track. when the 1st track ends 2nd track should start and so on for the remaining tracks. Thank You iphone audio avaudioplayer share improve this question inScript did you find a solution to this yet you..

How can you play music from the iPod app while still receiving remote control events in your app?

http://stackoverflow.com/questions/3191580/how-can-you-play-music-from-the-ipod-app-while-still-receiving-remote-control-ev

but it doesn't natively have access to the iPod library. AVAudioPlayer can be initialized with an asset URL and tracks in the iPod library type MPMediaItem do have a URL property that returns a NSURL instance which the documentation says its..

Adjusting the volume of a playing AVPlayer

http://stackoverflow.com/questions/3268949/adjusting-the-volume-of-a-playing-avplayer

meant to be this convoluted to simply manage volume levels I cannot use an AVAudioPlayer because I need to load iTunes tracks into the player. iphone objective c ios4 share improve this question You can change the volume while playing using.. and the volume you want to set is called volume the following code should do what you want NSArray audioTracks asset tracksWithMediaType AVMediaTypeAudio NSMutableArray allAudioParams NSMutableArray array for AVAssetTrack track in audioTracks AVMutableAudioMixInputParameters..

Behaviour for significant change location API when terminated/suspended?

http://stackoverflow.com/questions/3421242/behaviour-for-significant-change-location-api-when-terminated-suspended

you do when the application is suspended. The documentation for didFinishLaunchingWithOptions says The application tracks location updates in the background was purged and has now been relaunched. In this case the dictionary contains a key indicating..

How can you track motion using the iPhone's camera?

http://stackoverflow.com/questions/3933716/how-can-you-track-motion-using-the-iphones-camera

can you track motion using the iPhone's camera I saw that someone has made an app that tracks your feet using the camera so that you can kick a virtual football on your iPhone screen. How could you do something like..

Make movie file with picture Array and song file, using AVAsset

http://stackoverflow.com/questions/6061092/make-movie-file-with-picture-array-and-song-file-using-avasset

used the big post by zoul here . All is perfect I have my movie with my picture. However when I try to add some audio tracks I have lot of problems. To understand I put my code When I call this method picture array and song file are ready void writeImagesToMovieAtPath.. videoWriterInput sourcePixelBufferAttributes nil AVAssetTrack audioTrack asset.tracks objectAtIndex 0 AVAssetReaderOutput readerOutput AVAssetReaderTrackOutput assetReaderTrackOutputWithTrack audioTrack outputSettings.. kCMPersistentTrackID_Invalid a_compositionVideoTrack insertTimeRange video_timeRange ofTrack videoAsset tracksWithMediaType AVMediaTypeVideo objectAtIndex 0 atTime nextClipStartTime error nil nextClipStartTime CMTimeAdd nextClipStartTime..

track small movements of iphone with no GPS

http://stackoverflow.com/questions/6158176/track-small-movements-of-iphone-with-no-gps

small movements of iphone with no GPS I have to write an application for iphone that tracks the movement of the iphone itself given its initial position without ever using GPS. That is I can only use data provided..

MKAnnotationView - Lock custom annotation view to pin on location updates

http://stackoverflow.com/questions/6392931/mkannotationview-lock-custom-annotation-view-to-pin-on-location-updates

annotationview.canShowCallout true and the pin moves around the screen as the location is updated the standard callout tracks right along with the pin as if they're locked together. When using the custom callout solution above when my pin moves around..

How to copy songs from iPod Library to app and play with AVAudioPlayer?

http://stackoverflow.com/questions/7472141/how-to-copy-songs-from-ipod-library-to-app-and-play-with-avaudioplayer

asset error nil autorelease NSMutableArray myOutputs NSMutableArray alloc init autorelease for id track in asset tracks AVAssetReaderTrackOutput output AVAssetReaderTrackOutput assetReaderTrackOutputWithTrack track outputSettings nil myOutputs..

iOS 5.0 crash when reading data from an AVAssetReaderOutput

http://stackoverflow.com/questions/7812394/ios-5-0-crash-when-reading-data-from-an-avassetreaderoutput

kCMTimeZero kCMTimePositiveInfinity NSMutableArray myOutputs NSMutableArray alloc init for id track in asset tracks AVAssetReaderTrackOutput ot AVAssetReaderTrackOutput assetReaderTrackOutputWithTrack track outputSettings nil myOutputs..

Application crashed while importing songs from Ipod library in Iphone for iOs 5.0

http://stackoverflow.com/questions/8077725/application-crashed-while-importing-songs-from-ipod-library-in-iphone-for-ios-5

exportSession AVAssetExportSession alloc initWithAsset songAsset presetName AVAssetExportPresetPassthrough NSArray tracks songAsset tracksWithMediaType AVMediaTypeAudio AVAssetTrack track tracks objectAtIndex 0 id desc track.formatDescriptions.. alloc initWithAsset songAsset presetName AVAssetExportPresetPassthrough NSArray tracks songAsset tracksWithMediaType AVMediaTypeAudio AVAssetTrack track tracks objectAtIndex 0 id desc track.formatDescriptions objectAtIndex 0.. AVAssetExportPresetPassthrough NSArray tracks songAsset tracksWithMediaType AVMediaTypeAudio AVAssetTrack track tracks objectAtIndex 0 id desc track.formatDescriptions objectAtIndex 0 const AudioStreamBasicDescription audioDesc CMAudioFormatDescriptionGetStreamBasicDescription..

Video Encoding using AVAssetWriter - CRASHES

http://stackoverflow.com/questions/8191840/video-encoding-using-avassetwriter-crashes

aerror nil AVAssetReader reader AVAssetReader alloc initWithAsset avAsset error aerror AVAssetTrack videoTrack avAsset tracksWithMediaType AVMediaTypeVideo objectAtIndex 0 videoWriterInput.transform videoTrack.preferredTransform NSDictionary videoOptions.. audioReader AVAssetReader assetReaderWithAsset avAsset error error retain AVAssetTrack audioTrack avAsset tracksWithMediaType AVMediaTypeAudio objectAtIndex 0 AVAssetReaderOutput readerOutput AVAssetReaderTrackOutput assetReaderTrackOutputWithTrack.. videoWriterInput markAsFinished switch reader status case AVAssetReaderStatusReading the reader has more for other tracks even if this one is done break case AVAssetReaderStatusCompleted your method for when the conversion is done should..