Fixing Mac example to work without AFImageCache coupling

Mac Example/Classes/Controllers/NearbySpotsController.m

@@ -25,7 +25,6 @@
 #import "Spot.h"
 
 #import "AFImageRequestOperation.h"
-#import "AFImageCache.h"
 
 @interface NearbySpotsController ()
 @property (strong) NSArray *nearbySpots;
@@ -103,19 +102,18 @@
     Spot *spot = [self.nearbySpots objectAtIndex:row];
     
 	if ([[tableColumn dataCell] isMemberOfClass:[NSImageCell class]]) {
-        NSURL *imageURL = [NSURL URLWithString:spot.imageURLString];
-        NSImage *image = [[AFImageCache sharedImageCache] cachedImageForURL:imageURL cacheName:nil];
-        if (!image) {
+        if (spot.image) {
+            return spot.image;
+        } else {
             NSURLRequest *imageRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:spot.imageURLString]];
             AFImageRequestOperation *operation = [AFImageRequestOperation imageRequestOperationWithRequest:imageRequest success:^(NSImage *image) {
+                spot.image = image;
                 [tableView reloadDataForRowIndexes:[NSIndexSet indexSetWithIndex:row] columnIndexes:[NSIndexSet indexSetWithIndex:0]];
             }];
             [self.imageOperationQueue addOperation:operation];
             
-            image = [NSImage imageNamed:@"placeholder-stamp.png"];
+            return [NSImage imageNamed:@"placeholder-stamp.png"];
         }
-
-		return image;
 	} else {
 		return spot.name;
 	}

Mac Example/Classes/Models/Spot.h

@@ -27,12 +27,14 @@
 @private
     NSString *_name;
     NSString *_imageURLString;
+    NSImage *_image;
     NSNumber *_latitude;
     NSNumber *_longitude;
 }
 
 @property (strong) NSString *name;
 @property (strong) NSString *imageURLString;
+@property (strong) NSImage *image;
 @property (strong) NSNumber *latitude;
 @property (strong) NSNumber *longitude;
 @property (readonly) CLLocation *location;

Mac Example/Classes/Models/Spot.m

@@ -27,6 +27,7 @@
 @implementation Spot
 @synthesize name = _name;
 @synthesize imageURLString = _imageURLString;
+@synthesize image = _image;
 @synthesize latitude = _latitude;
 @synthesize longitude = _longitude;
 @dynamic location;