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iosobjective-cphotolibrary

delete photos in my project

I understand that I can't programmatically delete photos from my app . Because Apple writes that we can only add photos

To save a still image to the user’s Saved Photos album, use the UIImageWriteToSavedPhotosAlbum function. To save a movie to the user’s Saved Photos album, use the UISaveVideoAtPathToSavedPhotosAlbum function.

But I find project that have photos in project, so I can delete photos from this app by clicking delete icon (but still it crashes then =) ) project

And now I see only two ways:

  1. Save photos in my project folder and then I can do with it what I want. Can I do it? I think no =(
  2. Open standart Photos app from my app (open with...) but I read some threads about it, and I understood that it's impossible. That's right?
  3. Update! I written this point below. Can I create links in my app to photos in Photo Library? And then, if I want to delete photo from my app, I will delete link, so i will not see photo in my app, but it still stay in Photo Library. Does it possible?

So after all my searching I haven't found a solution. Are their some ways to solve my problem?

Solution

  • On Youtube I find next video and I understand that I can save photo to document directory. It was next code in video

    UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
NSData *data = UIImagePNGRepresentation (image);
NSString *myGrabbedImage = @"myGrabbedImage.png";
NSArray *path = NSSearchPathForDirectoriesInDomainns (NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentDirectory = [path objectAtIndex:0];
NSString *fullPathToFile = [documentDirectory stringByAppendingPathComponent:myGrabbedImage];
[data writeToFile:fullPathToFile atomically:YES];

    So I understand that is simple to save photo from Photo Library to my array, and then open photos from array. And I will can than simply delete photos by remove them from my array. Ok, but now I have 2 questions:

    1. How I can distinguish photos that i will save in my array? If I will allocate same photo in Photo Library it will be save some times - it's not good.
    2. So it will be work only with PNG images?

    PS Sorry, if this questions very newbiest, but my brain exploded after allday searching.