it's more powerful

Demo/Classes/DemoViewController.m

@@ -11,76 +11,80 @@
 
 @interface DemoViewController ()
 
-@property (strong, nonatomic) NSMutableArray *modelArray;
+@property (copy, nonatomic) NSArray *modelArray;
 
 @end
 
 @implementation DemoViewController
 
+static NSString *CellIdentifier = @"Cell"; // cell identifier
+
 @synthesize modelArray = _modelArray;
 
-- (id) init {
+- (instancetype) init {
     self = [super init];
     if(!self) return nil;
 
     self.title = @"The Office";
 
-    self.modelArray = [[NSMutableArray alloc] init];
-
-    [self.modelArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"http://cl.ly/4hCR/Untitled-7.png", @"ImageURL", @"Michael Scott", @"Title", nil]];
-    [self.modelArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"http://cl.ly/4iIc/Untitled-7.png", @"ImageURL", @"Jim Halpert", @"Title", nil]];
-    [self.modelArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"http://cl.ly/4hVv/Untitled-7.png", @"ImageURL", @"Pam Beasley-Halpert", @"Title", nil]];
-    [self.modelArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"http://cl.ly/4hF3/Untitled-7.png", @"ImageURL", @"Dwight Schrute", @"Title", nil]];
-    [self.modelArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"http://cl.ly/4hxj/Untitled-7.png", @"ImageURL", @"Andy Bernard", @"Title", nil]];
-    [self.modelArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"http://cl.ly/4iNI/Untitled-7.png", @"ImageURL", @"Kevin Malone", @"Title", nil]];
-    [self.modelArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"http://cl.ly/4iAX/Untitled-7.png", @"ImageURL", @"Stanley Hudson", @"Title", nil]];		
+    self.modelArray = @[@{@"ImageURL" : @"http://cl.ly/4hCR/Untitled-7.png", @"Title" : @"Michael Scott"},
+                        @{@"ImageURL" : @"http://cl.ly/4iIc/Untitled-7.png", @"Title" : @"Jim Halpert"},
+                        @{@"ImageURL" : @"http://cl.ly/4hVv/Untitled-7.png", @"Title" : @"Pam Beasley-Halpert"},
+                        @{@"ImageURL" : @"http://cl.ly/4hF3/Untitled-7.png", @"Title" : @"Dwight Schrute"},
+                        @{@"ImageURL" : @"http://cl.ly/4hxj/Untitled-7.png", @"Title" : @"Andy Bernard"},
+                        @{@"ImageURL" : @"http://cl.ly/4iNI/Untitled-7.png", @"Title" : @"Kevin Malone"},
+                        @{@"ImageURL" : @"http://cl.ly/4iAX/Untitled-7.png", @"Title" : @"Stanley Hudson"}];
 
     // You should remove this next line from your apps!!!
     // It is only here for demonstration purposes, so you can get an idea for what it's like to load images "fresh" for the first time.
 
     [[JMImageCache sharedCache] removeAllObjects];
 
+    [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:CellIdentifier];
+
 	return self;
 }
 
-#pragma mark -
-#pragma mark Autorotation Methods
+#pragma mark - Autorotation Methods
 
 - (BOOL) shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation {
 	return toInterfaceOrientation != UIInterfaceOrientationPortraitUpsideDown;
 }
 
-#pragma mark -
-#pragma mark Cleanup Methods
+#pragma mark - Cleanup Methods
 
 - (void) didReceiveMemoryWarning {
 	[super didReceiveMemoryWarning];
 }
 
-#pragma mark -
-#pragma mark UITableViewDataSource
+#pragma mark - UITableViewDataSource
 
 - (NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
 	return [self.modelArray count];
 }
 - (UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
-    static NSString *CellIdentifier = @"Cell";
-
-	UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
-	if(cell == nil) cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
-
-    NSString *urlString = [[self.modelArray objectAtIndex:indexPath.row] objectForKey:@"ImageURL"];
-
-	cell.textLabel.text = [[self.modelArray objectAtIndex:indexPath.row] objectForKey:@"Title"];
-
-    [cell.imageView setImageWithURL:[NSURL URLWithString:urlString]
-                        placeholder:[UIImage imageNamed:@"placeholder"]];
+    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
+
+    NSDictionary *cellDic = (self.modelArray)[indexPath.row];
+	cell.textLabel.text = cellDic[@"Title"];
+
+    JMImageCacheDownloadOptions option = JMImageCacheDownloadOptionsClickToDownload;
+//    option |= JMImageCacheDownloadOptionsClickToRefresh;
+    option |= JMImageCacheDownloadOptionsSearchCacheOnly;
+    [cell.imageView setImageWithURL:[NSURL URLWithString:cellDic[@"ImageURL"]]
+                                key:nil
+                            options:option
+                        placeholder:[UIImage imageNamed:@"placeholder"]
+                    completionBlock:^(UIImage *image) {
+                        //
+                    } failureBlock:^(NSURLRequest *request, NSURLResponse *response, NSError *error) {
+                        //
+                    }];
 
 	return cell;
 }
 
-#pragma mark -
-#pragma mark UITableViewDelegate
+#pragma mark - UITableViewDelegate
 
 - (CGFloat) tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
 	return 90.0;

Demo/JMImageCacheDemo.xcodeproj/project.pbxproj

@@ -225,6 +225,7 @@
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CODE_SIGN_IDENTITY = "iPhone Developer";
 				COPY_PHASE_STRIP = NO;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_OPTIMIZATION_LEVEL = 0;
@@ -241,6 +242,7 @@
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CODE_SIGN_IDENTITY = "iPhone Developer";
 				COPY_PHASE_STRIP = YES;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "Other Sources/JMImageCacheDemo_Prefix.pch";

JMImageCache.h

@@ -8,38 +8,23 @@
 
 #import "UIImageView+JMImageCache.h"
 
-@class JMImageCache;
-
-@protocol JMImageCacheDelegate <NSObject>
-
-@optional
-- (void) cache:(JMImageCache *)c didDownloadImage:(UIImage *)i forURL:(NSURL *)url;
-- (void) cache:(JMImageCache *)c didDownloadImage:(UIImage *)i forURL:(NSURL *)url key:(NSString*)key;
-
-@end
-
 @interface JMImageCache : NSCache
 
 + (JMImageCache *) sharedCache;
 
-- (void) imageForURL:(NSURL *)url key:(NSString *)key completionBlock:(void (^)(UIImage *image))completion failureBlock:(void (^)(NSURLRequest *request, NSURLResponse *response, NSError* error))failure;
-- (void) imageForURL:(NSURL *)url completionBlock:(void (^)(UIImage *image))completion failureBlock:(void (^)(NSURLRequest *request, NSURLResponse *response, NSError* error))failure;
-
-- (UIImage *) cachedImageForKey:(NSString *)key;
-- (UIImage *) cachedImageForURL:(NSURL *)url;
+- (void) imageForURL:(NSURL *)url key:(NSString *)key completionBlock:(JMICCompletionBlock)completion failureBlock:(JMICFailureBlock)failure;
+- (void) imageForURL:(NSURL *)url completionBlock:(JMICCompletionBlock)completion failureBlock:(JMICFailureBlock)failure;
 
-- (UIImage *) imageForURL:(NSURL *)url key:(NSString*)key delegate:(id<JMImageCacheDelegate>)d;
-- (UIImage *) imageForURL:(NSURL *)url delegate:(id<JMImageCacheDelegate>)d;
+- (UIImage *) cachedImageForURL:(NSURL *)url key:(NSString *)key;;
 
-- (UIImage *) imageFromDiskForKey:(NSString *)key;
-- (UIImage *) imageFromDiskForURL:(NSURL *)url;
+- (UIImage *) imageFromDiskForURL:(NSURL *)url key:(NSString *)key;;
 
-- (void) setImage:(UIImage *)i forKey:(NSString *)key;
-- (void) setImage:(UIImage *)i forURL:(NSURL *)url;
-- (void) removeImageForKey:(NSString *)key;
-- (void) removeImageForURL:(NSURL *)url;
+- (void) setImage:(UIImage *)i forURL:(NSURL *)url key:(NSString *)key;
+- (void) removeImageForURL:(NSURL *)url key:(NSString *)key;
 
 - (void) writeData:(NSData *)data toPath:(NSString *)path;
 - (void) performDiskWriteOperation:(NSInvocation *)invoction;
 
+- (void) _downloadAndWriteImageForURL:(NSURL *)url key:(NSString *)key completionBlock:(JMICCompletionBlock)completion failureBlock:(JMICFailureBlock)failure;
+
 @end