Steve Gear Steve Gear - 1 year ago 360
Objective-C Question

How do I get the data from UIImagePickerControllerReferenceURL?

I am using ELCImagePickerController in my app and I don't want to save the selected fullScreenImage to my array because if i selected 40 iPad images then that is not good.

I want to get data from

instead of
from the dict of method
- (void)elcImagePickerController:(ELCImagePickerController *)picker didFinishPickingMediaWithInfo:(NSArray *)info

I have tried:

NSDictionary *dict = [info objectAtIndex:count];

NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@",[dict objectForKey:@"UIImagePickerControllerReferenceURL"]]]];//UIImagePNGRepresentation([UIImage imageWithContentsOfFile:[NSString stringWithFormat:@"%@",[dict objectForKey:@"UIImagePickerControllerReferenceURL"]]] );
NSLog(@"length %d",[data length]);
imageview.image = [UIImage imageWithData:data];

However, every time I am getting 0 bytes. I have tried with all the answers available in forum but no use.

Can anyone answer this please?

Answer Source

UIImagePickerControllerReferenceURL returns NSURL object not the string object. Please change your code to -

NSData *data = [NSData dataWithContentsOfURL:[dict objectForKey:@"UIImagePickerControllerReferenceURL"]];
NSLog(@"length %d",[data length]);
imageview.image = [UIImage imageWithData:data];

UIImagePickerControllerReferenceURL returns NSURL object for Assets Library, so you can get image as -

ALAssetsLibrary *assetLibrary=[[ALAssetsLibrary alloc] init];
[assetLibrary assetForURL:[[self.imagedata objectAtIndex:i] valueForKey:UIImagePickerControllerReferenceURL] resultBlock:^(ALAsset *asset) {
    ALAssetRepresentation *rep = [asset defaultRepresentation];
    Byte *buffer = (Byte*)malloc(rep.size);
    NSUInteger buffered = [rep getBytes:buffer fromOffset:0.0 length:rep.size error:nil];
    NSData *data = [NSData dataWithBytesNoCopy:buffer length:buffered freeWhenDone:YES];//this is NSData may be what you want
    [data writeToFile:photoFile atomically:YES];//you can save image later
} failureBlock:^(NSError *err) {
    NSLog(@"Error: %@",[err localizedDescription]);
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