Get file name and extension from URL path

How to get file name with extension in a URL path is relatively straight forward in iOS. 

The code below should work. Put your url into a NSURL variable named yourURL or whatever. Then type the below:

 NSString *JPEGfilename = [[yourURL absoluteString] lastPathComponent];

This will give you your JPEG filename or below:

 NSURL *yourURL = [NSURL urlWithString:@"http://www.hdwallpapers.in/walls/honda_v4_concept_widescreen_bike-wide.jpg"];
 NSString *JPEGfilename = [yourURL lastPathComponent];




Get substring from an NSString in Objective-C

In Objective-C / Cocoa to grab a substring from an NSString based on beginning and ending characters is easy. This is helpful if you want to parse HTML, JSON, or a REST statement returning. See below:

 NSString *sStr = [NSString stringWithFormat:@"%@", assetGroups[indexPath.row]];
 NSString *name= [[[[sStr componentsSeparatedByString:@"Beginning Char(s)"] objectAtIndex:1] componentsSeparatedByString:@"End Char(s)"] objectAtIndex:0]; 
 NSString *newString = [NSString stringWithFormat:@"%@", name];

Playing Music from iOS Music Playlist with Unity3D

With this simple coding you can play a playlist on your device from your Unity3D Game. Why license royalties when you can get the user to do it for you per individual basis.  I am using this in my game Snowboarding+ (see gameplay demo above). If there is no music on your device it'll finally play the local music in your Unity 3D app. This plays the playlist called Snowboarding+

in AppController.mm (also add MediaPlayer.framework):

#include <MediaPlayer/MediaPlayer.h>

- (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions

{

[self playMusic];

}

- (void) playMusic {

  // Instantiate a music player

    MPMusicPlayerController *appPlayer = [MPMusicPlayerController applicationMusicPlayer];

    

    // Shuffle all songs

    [appPlayer setShuffleMode:MPMusicShuffleModeSongs];

    

    // Assume we will not find our playlist

    BOOL playlistFound = NO;

    

    // Get a collection of all playlists on the device

    MPMediaQuery *playlistsQuery = [MPMediaQuery playlistsQuery];

    NSArray *playlists = [playlistsQuery collections];

    NSString *plus;

    plus = @"all";

    // Check each playlist to see if it is the right one

    for (MPMediaPlaylist *playlist in playlists) {

        NSString *playlistName = [playlist valueForProperty: MPMediaPlaylistPropertyName];

        if ([playlistName isEqualToString:@"Snowboarding+"]) {

            // Add the playlist to the player's queue and get out of here

            [appPlayer setQueueWithItemCollection:playlist];

            playlistFound = YES;

            plus = @"snowboarding+";

            break;

        }

    }

    

    // If no playlist found, just play All playlist

    if (!playlistFound) {

        for (MPMediaPlaylist *playlist in playlists) {

            NSString *playlistName = [playlist valueForProperty: MPMediaPlaylistPropertyName];

            if ([playlistName isEqualToString:@"All"]) {

                // Add the playlist to the player's queue and get out of here

                [appPlayer setQueueWithItemCollection:playlist];

                playlistFound = YES;

                plus = @"all";

                break;

            }

            else

            {

                //IF NO ALL play a random song

                [appPlayer setQueueWithQuery: [MPMediaQuery songsQuery]];

                plus = @"random";

            }

        }

    }

    

    // Start playing from the beginning of the queue

    [appPlayer play];

    

    if (appPlayer.playbackState == MPMusicPlaybackStatePlaying)

{                

UnitySendMessage("Camera", "isPlaying","TRUE");

NSLog(@"%@ is playing",plus);}

            else

{

                UnitySendMessage("Camera", "isPlaying","FALSE");

NSLog(@"internal music from Unity3D App is playing");}

}

}

In Unity 3D add the following to the Script on your Camera or any game object from above:

var isMusicPlaying: boolean = false;

@script RequireComponent(AudioSource)

function Start() {

    // Delay a clip by 10 sec (44100 samples)

  #if UNITY_EDITOR || UNITY_ANDROID || UNITY_OSX

      audio.Play(44100 * 5);     

   #endif

}

function isPlaying(message:String)

 {

  if (message == "TRUE") {isMusicPlaying = true; audio.Stop(); }

  if (message == "FALSE") {isMusicPlaying = false;  audio.Play();  }

  Debug.Log("Is the Music Playing from Device? " + message);

 }