CODEWITHSUNDEEP
iphoneiosxcode
Bazinga
Bazinga

Reputation: 2466

Check existing image in NSDocumentDirectory

I have a picker that saves my image in NSDocumentDirectory, here:

        for (int i = 0; i < image.count; i++) {
            NSLog(@"%@", [image objectAtIndex:i]);
            NSArray *paths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory,    NSUserDomainMask ,YES );
            NSString *documentsDirec = [paths objectAtIndex:0];
            NSString *savedPath = [documentsDirec stringByAppendingPathComponent:[NSString stringWithFormat:@"myImages%d.png", i]];
            ALAssetRepresentation *rep = [[image objectAtIndex: i] defaultRepresentation];
            UIImage *image = [UIImage imageWithCGImage:[rep fullResolutionImage]];
            NSData *imageData = UIImagePNGRepresentation(image);
            [imageData writeToFile:savedPath atomically:YES];

            NSLog(@"saving at:%@",savedPath);
         }

How to determine or implement to check if an existing image/imageName is already there. Then if an images exist it will not add the same image/imageName even if its still picked in the picker.

Upvotes: 2

Views: 1978

Answers (3)

jay
jay

Reputation: 3667

Use the below code for checking a specific image is already exists in the documents directory:

NSString *documentsDirectoryPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];

NSString *imageName = [documentsPath stringByAppendingPathComponent:@"imageName.jpg"];
BOOL fileExists = [[NSFileManager defaultManager] imageName];

In your code you can add it like this:

 for (int i = 0; i < image.count; i++) {
                NSLog(@"%@", [image objectAtIndex:i]);
                NSArray *paths = NSSearchPathForDirectoriesInDomains(  NSDocumentDirectory,    NSUserDomainMask ,YES );
                NSString *documentsDirec = [paths objectAtIndex:0];
                NSString *savedPath = [documentsDirec stringByAppendingPathComponent: [NSString stringWithFormat:@"myImages%d.png", i]];

                BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:savedPath];

                //Save only if file not exists
                if(!fileExists) {
                ALAssetRepresentation *rep = [[image objectAtIndex: i] defaultRepresentation];
                UIImage *image = [UIImage imageWithCGImage:[rep fullResolutionImage]];
                NSData *imageData = UIImagePNGRepresentation(image);
                [imageData writeToFile:savedPath atomically:YES];

                NSLog(@"saving at:%@",savedPath);
               }
             }

Upvotes: 4

Paresh Navadiya
Paresh Navadiya

Reputation: 38239

Do this:

     for (int i = 0; i < image.count; i++) 
     {
        NSLog(@"%@", [image objectAtIndex:i]);
        NSArray *paths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory,    NSUserDomainMask ,YES );
        NSString *documentsDirec = [paths objectAtIndex:0];
        NSString *savedPath = [documentsDirec stringByAppendingPathComponent:[NSString stringWithFormat:@"myImages%d.png", i]];
        if(![[NSFileManager defaultManager]fileExistsAtPath:savedPath]) //if not exits then save image
        {
         ALAssetRepresentation *rep = [[image objectAtIndex: i] defaultRepresentation];
         UIImage *image = [UIImage imageWithCGImage:[rep fullResolutionImage]];
         NSData *imageData = UIImagePNGRepresentation(image);
         [imageData writeToFile:savedPath atomically:YES];
         NSLog(@"saving at:%@",savedPath);
        }
     }

Upvotes: 0

Prasad G
Prasad G

Reputation: 6718

        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"imageName.jpg"];

        if ([[NSFileManager defaultManager] fileExistsAtPath:filePath]) {
            NSLog(@"file exists at the path");
        }
        else
            NSLog(@"file doesnt exist");

I think it will be helpful to you.

Upvotes: 1

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