Migrated away from RACTuple as view model model.

FRP/FRPFullSizePhotoViewModel.m

@@ -11,31 +11,34 @@
 // Model
 #import "FRPPhotoModel.h"
 
-
 @interface FRPFullSizePhotoViewModel ()
 
+// Private access
+@property (nonatomic, assign) NSInteger initialPhotoIndex;
+
 @end
 
 @implementation FRPFullSizePhotoViewModel
 
+-(instancetype)initWithPhotoArray:(NSArray *)photoArray initialPhotoIndex:(NSInteger)initialPhotoIndex {
+    self = [self initWithModel:photoArray];
+    if (!self) return nil;
+    
+    self.initialPhotoIndex = initialPhotoIndex;
+    
+    return self;
+}
+
 -(NSString *)initialPhotoName {
-    return [self.photoArray[self.initialPhotoIndex] photoName];
-}
-
--(NSInteger)initialPhotoIndex {
-    return [self.model.second integerValue];
-}
-
--(NSArray *)photoArray {
-    return self.model.first;
+    return [self.model[self.initialPhotoIndex] photoName];
 }
 
 -(FRPPhotoModel *)photoModelAtIndex:(NSInteger)index {
-    if (index < 0 || index > self.photoArray.count - 1) {
+    if (index < 0 || index > self.model.count - 1) {
         // Index was out of bounds, return nil
         return nil;
     } else {
-        return self.photoArray[index];
+        return self.model[index];
     }
 }