CODEWITHSUNDEEP
iphoneobjective-ciosarraysimage
T1992
T1992

Reputation: 73

Pictures put into a array Ios developing

I have a folder with pictures in my project and i like to know how i could put this pictures from the folder into a array

How should i do that?

I tried this to put the images in the array

    UIImage*image = [[NSBundle mainBundle]pathsForResourcesOfType:@"jpg" @"jpeg" @"gif" inDirectory:@"Images"];
    NSArray*images = [[NSMutableArray alloc]initWithContentsOfFile:image];

Upvotes: 2

Views: 2443

Answers (5)

Rob
Rob

Reputation: 437412

You could do the following, getting the array of filenames and then filling another array with the images, themselves (assuming that's what you were trying to do).

NSMutableArray *imagePaths = [[NSMutableArray alloc] init];
NSMutableArray *images = [[NSMutableArray alloc] init];

NSArray *imageTypes = [NSArray arrayWithObjects:@"jpg", @"jpeg", @"gif", nil];

// load the imagePaths array

for (NSString *imageType in imageTypes)
{
    NSArray *imagesOfParticularType = [[NSBundle mainBundle]pathsForResourcesOfType:imageType 
                                                                        inDirectory:@"Images"];
    if (imagesOfParticularType)
        [imagePaths addObjectsFromArray:imagesOfParticularType];
}

// load the images array

for (NSString *imagePath in imagePaths)
    [images addObject:[UIImage imageWithContentsOfFile:imagePath]];

As an aside, unless these are tiny thumbnail images and you have very few, it generally would not be advisable to load all the images at once like this. Generally, because images can take up a lot of RAM, you would keep the array of filenames, but defer the loading of the images until you really need them.

If you don't successfully retrieve your images, there are two questions:

  1. Are the files included in my bundle? When you select the "Build Phases" for your Target's settings and expand the "Copy Bundle Resources" (see the image below), do you see your images included? If you don't see your images in this list, they won't be included in the app when you build it. To add your images, click on the "+" and add them to this list.

    enter image description here

  2. Are the files in a "group" or in an actual subdirectory? When you add files to a project, you'll see the following dialog:

    enter image description here

    If you chose "Create folder references for added folders", then the folder will appear in blue in your project (see the blue icon next to my "db_images" folder in the preceding screen snapshot). If you chose "create groups for added folders", though, there will be the typical yellow icon next to your "Images" group. Bottom line, in this scenario, where you're looking for images in the subdirectory "Images", you want to use the "Create folder references for added folders" option with the resulting blue icon next to the images.

Bottom line, you need to ensure the images are in your app bundle and that they are where you think they are. Also note that iOS is case sensitive (though the simulator is not), so make sure you got the capitalization of "Images" right.

Upvotes: 5

Ramy Al Zuhouri
Ramy Al Zuhouri

Reputation: 21966

Try this: 

    NSMutableArray* paths=[NSMutableArray new];
    NSFileManager* manager=[NSFileManager new];
    NSBundle* bundle= [NSBundle mainBundle];
    NSDirectoryEnumerator* enumerator= [manager enumeratorAtPath: [bundle bundlePath] ];
    for(NSString* path in enumerator)
    {
        if([path hasSuffix: @".jpg"] || [path hasSuffix: @".jpeg"] || [path hasSuffix: @".gif"])
        {
            [paths addObject: path];
        }
    }

For explanations I suggest that you look at NSDirectoryEnumerator documentation.

Upvotes: 0

Mikhail Grebionkin
Mikhail Grebionkin

Reputation: 3836

Read the documentation of initWithContentsOfFile method of NSArray:

The array representation in the file identified by aPath must contain only property list objects (NSString, NSData, NSArray, or NSDictionary objects). The objects contained by this array are immutable, even if the array is mutable.

In your case you need to use NSFileManager to enumerate files in directory. Here is the example of directory enumeration from documentation:

NSFileManager *localFileManager=[[NSFileManager alloc] init];
NSDirectoryEnumerator *dirEnum =
    [localFileManager enumeratorAtPath:docsDir];

NSString *file;
while (file = [dirEnum nextObject]) {
    if ([[file pathExtension] isEqualToString: @"doc"]) {
        // Create an image object here and add it to 
        // mutable array
    }
}
[localFileManager release];

Upvotes: 0

Boris Prohaska
Boris Prohaska

Reputation: 912

[[NSBundle mainBundle]pathsForResourcesOfType:@"jpg" @"jpeg" @"gif" inDirectory:@"Images"];

already returns an array of these objects. Change your line to this:

 NSArray *images = [[NSBundle mainBundle]pathsForResourcesOfType:@"jpg" @"jpeg" @"gif" inDirectory:@"Images"];

Note that this array will only hold the paths for all your images. In order to make images of them you need to call

for(NSString* imagePath in images) {

    UIImage* anImage = [[UIImage alloc] initWithContentsOfFile:imagePath];
    //do something with your image here.
}

Hope that helps

Upvotes: 0

Edward Majcher
Edward Majcher

Reputation: 91

If I am understanding your question correctly initWithContentsOfFile doesn't do what you are expecting, per the documentation:

"Initializes a newly allocated array with the contents of the file specified by a given path."

Additionally, pathsForResourceOfType is already creating an array, not a UIImage, you can simply do:

NSArray* images = [[NSBundle mainBundle]pathsForResourcesOfType:@"jpg" @"jpeg" @"gif" inDirectory:@"Images"];

Upvotes: 0

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