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An NSValueTransformer to convert images to/from serialized PNGs (for CoreData)
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| // | |
| // BPImageTransformer.h | |
| // Skates | |
| // | |
| // Created by Jon Olson on 2/3/10. | |
| // Copyright 2010 Ballistic Pigeon, LLC. All rights reserved. | |
| // | |
| #import <Foundation/Foundation.h> | |
| @interface BPImageTransformer : NSValueTransformer { | |
| } | |
| + (void)registerValueTransformer; | |
| @end |
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| // | |
| // BPImageTransformer.m | |
| // Skates | |
| // | |
| // Created by Jon Olson on 2/3/10. | |
| // Copyright 2010 Jon Olson. All rights reserved. | |
| // | |
| #import "BPImageTransformer.h" | |
| @interface BPImageTransformer (Private) | |
| @end | |
| @implementation BPImageTransformer | |
| + (void)registerValueTransformer { | |
| [NSValueTransformer setValueTransformer:[[[self alloc] init] autorelease] forName:@"BPImageTransformer"]; | |
| } | |
| + (Class)transformedValueClass | |
| { | |
| return [NSData class]; | |
| } | |
| + (BOOL)allowsReverseTransformation | |
| { | |
| return YES; | |
| } | |
| - (id)transformedValue:(id)value | |
| { | |
| if (value == nil) | |
| return nil; | |
| // I pass in raw data when generating the image, save that directly to the database | |
| if ([value isKindOfClass:[NSData class]]) | |
| return value; | |
| return UIImagePNGRepresentation((UIImage *)value); | |
| } | |
| - (id)reverseTransformedValue:(id)value | |
| { | |
| return [UIImage imageWithData:(NSData *)value]; | |
| } | |
| @end |
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