Accessing Images in iPhone

In iPhone you can use the Assets Library framework to access the pictures and videos managed by the Photo application in the device. Have a look at framework reference by apple here.

I recenlty access all images in my iPhone device's photo application. I would like to share what i actually tried through this blog.

I first accessed all the albums in Photo appllication of my device. Then i enumerated each ato get all the images in each album. Below code takes all the pics and add to an Array.

To load albums use the code below. 

dispatch_async(dispatch_get_main_queue(), ^

{

NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

// Group enumerator Block

void (^assetGroupEnumerator)( ALAssetsGroup *, BOOL *) = ^(ALAssetsGroup *group, BOOL *stop) {

if (group == nil){

return;

}

[self.assetGroups addObject:group];

NSLog(@"the total albums are : %d",self.assetGroups.count);

NSLog(@"count in thtread: %d", [group numberOfAssets]);//Displays count of total photos

};

// Group Enumerator Failure Block

void (^assetGroupEnumberatorFailure)(NSError *) = ^(NSError *error) {

UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Error" message:[NSString stringWithFormat:@"Album Error: %@", [error description]] delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil];

[alert show];

[alert release];

NSLog(@"A problem occured %@", [error description]);

};

// Enumerate Albums

NSLog(@"enumerate assets in thread");

ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];

[library enumerateGroupsWithTypes:ALAssetsGroupAll

usingBlock:assetGroupEnumerator

failureBlock:assetGroupEnumberatorFailure];

[library release];

[pool release];

})

Where the assetGroups is nothing but ALAssetGroup to which all the albums is added through the above code.

And now loop through each album and pic the assets init.

for(ALAssetsGroup *group in self.assetGroups)

{

[group enumerateAssetsUsingBlock:^(ALAsset *result, NSUInteger index, BOOL *stop)

{

if(result == nil)

{

return;

}

NSLog(@" the assset are : %@", result);

Asset *asset = [[[Asset alloc] initWithAsset:result] autorelease];

[self.elcAssets addObject:asset];

NSLog(@" the assset are : %@", self.elcAssets);

}];

}

NSLog(@"album count : %d", self.assetGroups.count);

NSLog(@"enumerating photos");

NSMutableArray *selectedAssetsImages = [[[NSMutableArray alloc] init] autorelease];

for(Asset *elcAsset in self.elcAssets)

{

[selectedAssetsImages addObject:[elcAsset asset]];

}

Asset here is an array selectedAssestsImages ia an array to which i add all the looped assets. So finally you get all the assets in this array.

Thats how i programmed to take all the images from the Photos in my device.  For even more brief solution have a look at this

Happy blogging :)