UIImage extension, with custom cache control.

UIImage+Cache.h

//
//  UIImage+Cache.m
//
//  Created by Mark on 6/6/12.
//  Copyright (c) 2012 skram devs LLC. All rights reserved.
//  http://skr.am



#import <UIKit/UIKit.h>

@interface UIImage(Cache)

/* Used to free all allocated memory for cache */
+(void)freeCache;

/* The usual, horrible -imageNamed: turned pretty. */
+(UIImage*)imageNamed:(NSString*)name;

/* With this you can choose if you want the images stored in the cache to autorelease*/
+(void)setShouldAutorelease:(BOOL)value;

@end

UIImage+Cache.m

//
//  UIImage+Cache.m
//
//  Created by Mark on 6/6/12.
//  Copyright (c) 2012 skram devs LLC. All rights reserved.
//  http://skr.am


#import "UIImage+Cache.h"


static NSMutableDictionary *_cache = nil;
static BOOL autoReleaseImages = FALSE;

@implementation UIImage(Cache)


+(void)setShouldAutorelease:(BOOL)value {

    autoReleaseImages = value;
}

+(void)freeCache {
    
    
    if (_cache != nil) {
        NSLog(@"Cache Freed %@", _cache);
        [_cache release];
        _cache = nil;
    }
    
}

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wobjc-protocol-method-implementation"

+(UIImage*)imageNamed:(NSString*)name {
    
    if(_cache == nil)
        _cache = [[NSMutableDictionary alloc] init];
    
    if([_cache objectForKey:name] != nil)
        return (UIImage*)[_cache objectForKey:name];
    
    NSString *filePath = nil;
    
    if([name hasPrefix:@"/"]) {
        
       // NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
       // NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
        
        filePath = [name copy];
        name = [name lastPathComponent];
        
    } else {
        
        NSArray *comps = [name componentsSeparatedByString:@"."];
        filePath = [[NSBundle mainBundle] pathForResource:[comps objectAtIndex:0] 
                                                        ofType:[comps objectAtIndex:1]];
    }
    
    UIImage *image = nil;
    
    if(autoReleaseImages)
        image = [[UIImage imageWithContentsOfFile:filePath] autorelease];
    else
        image = [UIImage imageWithContentsOfFile:filePath];
    
    [filePath release];
    
    NSAssert(image, @"Image Not Found");
    
    [_cache setObject:image forKey:[name lastPathComponent]];
    
    return image;
}

#pragma clang diagnostic pop

@end

---

if(autoReleaseImages)
image = [[UIImage imageWithContentsOfFile:filePath] autorelease];
else
image = [UIImage imageWithContentsOfFile:filePath];

---

what's the different between that two methods?