Created
February 16, 2012 14:10
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ImageIO versus UIImageJPEGRepresentation
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| // UIImageJPEGRepresentation | |
| NSData *data = UIImageJPEGRepresentation(tileImage, 0.71); | |
| [data writeToURL:cacheURL atomically:YES]; | |
| // ImageIO | |
| #import <ImageIO/ImageIO.h> | |
| #import <MobileCoreServices/UTCoreTypes.h> | |
| CGImageDestinationRef destination = CGImageDestinationCreateWithURL((CFURLRef)cacheURL, kUTTypeJPEG, 1, NULL); | |
| NSDictionary *destOptions = [NSDictionary dictionaryWithObject:[NSNumber numberWithFloat:0.71] forKey:(NSString *)kCGImageDestinationLossyCompressionQuality]; | |
| CGImageDestinationAddImage(destination, [scaledTileImage CGImage], (CFDictionaryRef)destOptions); | |
| CGImageDestinationFinalize(destination); | |
| CFRelease(destination); | |
Do you have any bench marks for memory usage and speed?
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UIImageJPEGRepresentation uses ImageIO underneath.