Using OpenCV in iPhone SDK

A Good post for using OpenCV in iPhone SDK
http://niw.at/articles/2009/03/14/using-opencv-on-iphone/en

Upload Song from iPod Library to Webserver using ASIHTTPRequest

1. in Your .h file

     #import

    and use include MPMediaPickerControllerDelegate

2. in .m file where your brows button

     MPMediaPickerController *picker =[[MPMediaPickerController alloc] initWithMediaTypes: MPMediaTypeAnyAudio];

picker.delegate = self;

        picker.allowsPickingMultipleItems = YES;

[[UIApplication sharedApplication] setStatusBarStyle: UIStatusBarStyleBlackOpaque animated:YES];

      [self presentModalViewController:picker animated:YES];

        [picker release];

3.  #pragma mark -

#pragma mark Media Picker Delegate Methods

- (void) mediaPicker: (MPMediaPickerController *) mediaPicker didPickMediaItems: (MPMediaItemCollection *) theCollection {   

NSArray *ArrItems=theCollection.items;

MPMediaItem *curItem = [ArrItems objectAtIndex:0]; 

NSString *SongName=[curItem valueForProperty:MPMediaItemPropertyTitle];

NSURL *assetURL = [curItem valueForProperty:MPMediaItemPropertyAssetURL];

AVURLAsset *songAsset = [AVURLAsset URLAssetWithURL:assetURL options:nil];

AVAssetExportSession *exportSession = [[AVAssetExportSession alloc]

                                           initWithAsset:songAsset

                                           presetName:AVAssetExportPresetPassthrough];

NSArray *tracks = [songAsset tracksWithMediaType:AVMediaTypeAudio];

AVAssetTrack *track = [tracks objectAtIndex:0];

id desc = [track.formatDescriptions objectAtIndex:0];

const AudioStreamBasicDescription *audioDesc = CMAudioFormatDescriptionGetStreamBasicDescription((CMAudioFormatDescriptionRef)desc);

    FourCharCode formatID = audioDesc->mFormatID;

NSString *fileType = nil;

NSString *ex = nil;

switch (formatID) {

            

        case kAudioFormatLinearPCM:

        {

            UInt32 flags = audioDesc->mFormatFlags;

            if (flags & kAudioFormatFlagIsBigEndian) {

                fileType = @"public.aiff-audio";

                ex = @"aif";

            } else {

                fileType = @"com.microsoft.waveform-audio";

                ex = @"wav";

            }

        }

            break;

            

        case kAudioFormatMPEGLayer3:

            fileType = @"com.apple.quicktime-movie";

            ex = @"mp3";

break;

            

        case kAudioFormatMPEG4AAC:

            fileType = @"com.apple.m4a-audio";

            ex = @"m4a";

            break;

            

        case kAudioFormatAppleLossless:

            fileType = @"com.apple.m4a-audio";

            ex = @"m4a";

            break;

            

        default:

            break;

    }

exportSession.outputFileType = fileType;

NSString *exportFile = [[self myDocumentsDirectory] stringByAppendingPathComponent:           

[NSString stringWithFormat:@"%@.%@",SongName,ex]];

NSURL *exportURL = [[NSURL fileURLWithPath:exportFile] retain];

exportSession.outputURL = exportURL; 

// do the export

// (completion handler block omitted) 

[exportSession exportAsynchronouslyWithCompletionHandler:

^{

NSData *Songdata = [NSData dataWithContentsOfFile: [[self myDocumentsDirectory] 

stringByAppendingPathComponent: [NSString stringWithFormat:@"%@.%@",SongName,ex]]];

 

ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:uploadSong]];

[request setDelegate:self];

NSString *UserID = [[NSUserDefaults standardUserDefaults]objectForKey:@"USERID"];

 

[request setPostValue:@"23" forKey:@"user_id"];

[request setPostValue:@"1" forKey:@"category_id"];

[request addData:Songdata withFileName:SongName andContentType:ex forKey:@"upload_song"];

[request startAsynchronous];

 

}];

[self dismissModalViewControllerAnimated: YES];

}

-(NSString *)myDocumentsDirectory

{

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *documentsDirectory = [paths objectAtIndex:0];

return documentsDirectory;

}

4.

#pragma mark 

#pragma mark ASIHTTPRequestDelegate Methods

- (void)requestFinished:(ASIHTTPRequest *)request 

{

NSString *receivedString = [request responseString];

NSLog(@"%@",receivedString);

}

- (void)requestFailed:(ASIHTTPRequest *)request

{

NSString *receivedString = [request responseString];

NSLog(@"%@",receivedString);

}

- (void)request:(ASIHTTPRequest *)request didReceiveData:(NSData *)data

{

NSString* str = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];

NSLog(@"%@",str);

} 

Passcode Screen

There is a good example to create a Passcode screen.....

https://github.com/guicocoa/pinview

Open Doc Files from Another Application

1. in AppDelegate
if (launchOptions && [launchOptions objectForKey:UIApplicationLaunchOptionsURLKey])
{

printf("Launch options:\n");
CFShow(launchOptions);
NSString *filePath = [NSString stringWithFormat:@"%@", (NSURL*)[launchOptions objectForKey:UIApplicationLaunchOptionsURLKey]];
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
NSMutableArray *ArrTmp;
if ([[prefs objectForKey:@"DocArray"] count])
{
ArrTmp=[[prefs objectForKey:@"DocArray"] mutableCopy];
}
else
{
ArrTmp=[[NSMutableArray alloc] init];
}
[ArrTmp addObject:filePath];
[prefs setObject:ArrTmp forKey:@"DocArray"];

}


2. Add These Value in infoPList


CFBundleDocumentTypes


CFBundleTypeIconFile
Icon.png
CFBundleTypeName
PDF
CFBundleTypeRole
Editor
LSItemContentTypes

com.adobe.pdf

LSTypeIsPackage

NSDocumentClass
Document
NSPersistentStoreTypeKey
Binary


CFBundleTypeIconFile
Icon.png
CFBundleTypeName
BMP
CFBundleTypeRole
Editor
LSItemContentTypes

com.microsoft.bmp

LSTypeIsPackage

NSDocumentClass
Document
NSPersistentStoreTypeKey
Binary


CFBundleTypeIconFile
Icon.png
CFBundleTypeName
W8BN
CFBundleTypeRole
Editor
LSItemContentTypes

com.microsoft.word.doc

LSTypeIsPackage

NSDocumentClass
Document
NSPersistentStoreTypeKey
Binary


CFBundleTypeIconFile
Icon.png
CFBundleTypeName
XLS8
CFBundleTypeRole
Editor
LSItemContentTypes

com.microsoft.excel.xls

LSTypeIsPackage

NSDocumentClass
Document
NSPersistentStoreTypeKey
Binary


CFBundleTypeIconFile
Icon.png
CFBundleTypeName
SLD8
CFBundleTypeRole
Editor
LSItemContentTypes

com.microsoft.powerpoint.​ppt

LSTypeIsPackage

NSDocumentClass
Document
NSPersistentStoreTypeKey
Binary




Now it handle PDF,Doc,Xls,Ppt files and you have all open files in Userdefault named "DocArray"

Refernce :- http://developer.apple.com/library/mac/#documentation/Miscellaneous/Reference/UTIRef/Articles/System-DeclaredUniformTypeIdentifiers.html

Customize SplitViewController

Found a Good Example of Customize SliptViewController

MGSplitViewController

Add a image layer over camera

ImagePicker = [[UIImagePickerController alloc] init];
ImagePicker.delegate = self;
#if TARGET_IPHONE_SIMULATOR
ImagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
#elif TARGET_OS_IPHONE
ImagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
UIImageView *ImgOutline=[[UIImageView alloc] initWithFrame:CGRectMake(20, 28, 124, 404)];
ImgOutline.image=[UIImage imageNamed:@"outline.png"];
[ImagePicker.view addSubview:ImgOutline];
#endif

ImagePicker.navigationController.navigationBar.barStyle = UIBarStyleBlack;
ImagePicker.editing = YES;
[self presentModalViewController:ImagePicker animated:YES];
[ImagePicker release];

water effect with basic animation iphone sdk

I have found a good animation effect from google (Hidden Property)

CATransition *transition = [CATransition animation];
transition.type = @"rippleEffect";
transition.duration = 1.0f;
transition.timingFunction = UIViewAnimationCurveEaseInOut;
[self.view.layer addAnimation:transition forKey:@"transitionViewAnimation"];

we can use suckEffect and spewEffect similarly