What's the best way to save and retrieve an array of images across app restarts? I'm implementing a caching feature for offline viewing of downloaded images and just want to make sure I'm using the right persisting methods.
Thanks!
+1
A:
The quickest & probably best solution would be to persist your images to disk, no question about it.
You could do something like this to save them as JPEG.
NSData *data = UIImageJPEGRepresentation(image, 1.0f);
[data writeToFile:imagePath atomically:YES];
Yannick Compernol
2010-09-30 14:02:52
I'd like to save the entire array of images. Will this still work properly if I swap out the UIImage for an NSArray?
Jeff
2010-09-30 15:55:06
You would have to iterate through the array, converting each UIImage to its JPEG representation using something like the code that Yannick provided.
GregInYEG
2010-09-30 16:30:31
I undertand that, however, I should mention there will be multiple arrays that need to be cached separately. This way I could later just recreate them when the app launches. If I save the images, this may not work since they will all be save in the same directory and I won't know which set of images belong to which array.
Jeff
2010-09-30 22:37:34
Yannick Compernol
2010-10-01 07:50:14
I'll take a look at your suggestions and see what works. Many Thanks.
Jeff
2010-10-01 14:33:55