- Update images

- Implement SubItemsView (NOT COMPLETED)

Pod/Classes/TabBarItem.m

@@ -28,7 +28,6 @@
         _orientation = [[UIDevice currentDevice] orientation];
         
         _itemButton = [[UIButton alloc] initForAutoLayout];
-        [_itemButton setBackgroundColor:[UIColor whiteColor]];
         
         [self addSubview:_itemButton];
         
@@ -47,6 +46,8 @@
     
     //[_itemButton autoPinEdgesToSuperviewMargins];
     [_itemButton autoCenterInSuperview];
+    [_itemButton autoMatchDimension:ALDimensionHeight toDimension:ALDimensionHeight ofView:self];
+    [_itemButton autoMatchDimension:ALDimensionWidth toDimension:ALDimensionWidth ofView:self];
     
 }
 

Pod/Classes/TabBarPicker.h

@@ -25,6 +25,7 @@ typedef NS_ENUM(NSInteger, TabBarPickerPosition) {
 @property (nonatomic, readonly) CGSize tabBarSize;
 @property (nonatomic, readonly) TabBarPickerPosition position;
 @property (nonatomic, readonly) NSLayoutRelation layoutRelation;
+@property (nonatomic) NSUInteger subItemPerRow;
 @property (nonatomic) CGFloat paddingLeft;
 @property (nonatomic) CGFloat paddingRight;
 @property (nonatomic) CGFloat paddingTop;
@@ -48,7 +49,7 @@ typedef NS_ENUM(NSInteger, TabBarPickerPosition) {
  *
  *  @return raturn instance of TabBarPicker object.
  */
-- (instancetype) initWithTabBarItems:(NSArray *)items forPosition:(TabBarPickerPosition)position;
+- (instancetype) initWithTabBarItems:(NSArray *) items forPosition:(TabBarPickerPosition) position;
 
 /**
  *  Init TabBarPicker with items. When is selected an item the picher show down subitems.
@@ -68,7 +69,7 @@ typedef NS_ENUM(NSInteger, TabBarPickerPosition) {
  *
  *  @return raturn instance of TabBarPicker object.
  */
-- (instancetype) initWithTabBarItems:(NSArray *)items forPosition:(TabBarPickerPosition)position andNSLayoutRelation:(NSLayoutRelation) relation;
+- (instancetype) initWithTabBarItems:(NSArray *) items forPosition:(TabBarPickerPosition) position andNSLayoutRelation:(NSLayoutRelation) relation;
 
 /**
  *  Init TabBarPicker with items. When is selected an item the picher show down subitems.
@@ -91,6 +92,29 @@ typedef NS_ENUM(NSInteger, TabBarPickerPosition) {
  */
 - (instancetype) initWithTabBarItems:(NSArray*) items withTabBarSize:(CGSize) size forPosition:(TabBarPickerPosition) position andNSLayoutRelation:(NSLayoutRelation) relation;
 
+/**
+ *  Init TabBarPicker with items. When is selected an item the picher show down subitems.
+ *  By default when one of more subItems are selected the selected item become selected.
+ *  The picker size is dinamically based the max subitems of items
+ *
+ *  @param items Represents tab bar items. That array cannot be nil.
+ *
+ *  @param size  Represents the tabbar size
+ *
+ *  @param position Represents the posizion in the Screen:
+ *                      - TabBarPickerPositionLeft : Is positioned in vertical on left of the screen and shows the picker at its right
+ *                      - TabBarPickerPositionRight : Is positioned in vertical on right of the screen and shows the picker at its left
+ *                      - TabBarPickerPositionBottom : Is positioned in horizontal on bottom of the screen and shows the picker at its top
+ *                      - TabBarPickerPositionTop : Is positioned in horizontal on top of the screen and shows the picker at its bottom
+ *
+ *  @param relation Represents NSLayoutRelation for TabBar layout.
+ *
+ *  @param subItemsPerRow Represents the number of subItems per single row of subitem picker
+ *
+ *  @return <#return value description#>
+ */
+- (instancetype) initWithTabBarItems:(NSArray*) items withTabBarSize:(CGSize) size forPosition:(TabBarPickerPosition) position andNSLayoutRelation:(NSLayoutRelation) relation subItemsPerRow:(NSUInteger)  subItemsPerRow;
+
 /**
  *  <#Description#>
  *

Pod/Classes/TabBarPicker.m

@@ -10,30 +10,41 @@
 #import <PureLayout/PureLayout.h>
 #import "TabBarPickerSubItemsView.h"
 
+#define DEFAULT_SUB_ITEMS_PER_ROW 2
+
 @interface TabBarPicker() <TabBarItemDelegate>
 
 @property (nonatomic) UIDeviceOrientation orientation;
+@property (nonatomic) NSUInteger subItemRows;
+@property (nonatomic, strong) TabBarPickerSubItemsView *subItemSelector;
 
 @end
 
 @implementation TabBarPicker
 
-- (instancetype) initWithTabBarItems:(NSArray *)items forPosition:(TabBarPickerPosition)position {
+- (instancetype) initWithTabBarItems:(NSArray *) items forPosition:(TabBarPickerPosition) position {
     
-    return [self initWithTabBarItems:items withTabBarSize:CGSizeZero forPosition:position andNSLayoutRelation:NSLayoutRelationEqual];
+    return [self initWithTabBarItems:items withTabBarSize:CGSizeZero forPosition:position andNSLayoutRelation:NSLayoutRelationEqual subItemsPerRow:DEFAULT_SUB_ITEMS_PER_ROW];
     
 }
 
-- (instancetype) initWithTabBarItems:(NSArray *)items forPosition:(TabBarPickerPosition)position andNSLayoutRelation:(NSLayoutRelation)relation {
+- (instancetype) initWithTabBarItems:(NSArray *) items forPosition:(TabBarPickerPosition) position andNSLayoutRelation:(NSLayoutRelation) relation {
     
-    return [self initWithTabBarItems:items withTabBarSize:CGSizeZero forPosition:position andNSLayoutRelation:relation];
+    return [self initWithTabBarItems:items withTabBarSize:CGSizeZero forPosition:position andNSLayoutRelation:relation subItemsPerRow:DEFAULT_SUB_ITEMS_PER_ROW];
     
 }
 
-- (instancetype) initWithTabBarItems:(NSArray*) items withTabBarSize:(CGSize) size forPosition:(TabBarPickerPosition) position andNSLayoutRelation:(NSLayoutRelation)relation {
+- (instancetype) initWithTabBarItems:(NSArray *) items withTabBarSize:(CGSize) size forPosition:(TabBarPickerPosition) position andNSLayoutRelation:(NSLayoutRelation) relation {
+    
+    return [self initWithTabBarItems:items withTabBarSize:size forPosition:position andNSLayoutRelation:relation subItemsPerRow:DEFAULT_SUB_ITEMS_PER_ROW];
+    
+}
+
+- (instancetype) initWithTabBarItems:(NSArray*) items withTabBarSize:(CGSize) size forPosition:(TabBarPickerPosition) position andNSLayoutRelation:(NSLayoutRelation) relation subItemsPerRow:(NSUInteger) subItemsPerRow {
     
     self = [self initForAutoLayout];
     if (self) {
+        _subItemPerRow = subItemsPerRow;
         _itemSpacing = 10;
         _paddingLeft = 0;
         _paddingRight = 0;
@@ -58,6 +69,13 @@
         for (NSObject *item in items) {
             [self addItem:item];
         }
+        
+        if ([_tabBarItems count] > 0) {
+            
+            _subItemSelector = [[TabBarPickerSubItemsView alloc] initWithTabBarItems:_tabBarItems];
+            
+            [self addSubview:_subItemSelector];
+        }
     }
     
     [self updateConstraintsIfNeeded];
@@ -136,6 +154,8 @@
     }
     
     [self updateConstraintsIfNeeded];
+    
+    [_subItemSelector layoutSubviews];
 }
 
 - (void) setPosition:(TabBarPickerPosition)position {
@@ -155,7 +175,6 @@
     if (item && [item isKindOfClass:[TabBarItem class]]) {
         
         [_tabBarItems addObject:item];
-        [item setBackgroundColor:[UIColor lightGrayColor]];
         [item setDelegate:self];
         [self addSubview:item];
         

Pod/Classes/TabBarPickerSubItemsView.h

@@ -7,8 +7,37 @@
 //
 
 #import <UIKit/UIKit.h>
+#import "TabBarItem.h"
+
+@class TabBarPickerSubItemsView;
+
+@protocol TabBarPickerSubItemsViewDelegate <NSObject>
+
+@required
+
+- (void) tabarPickerSubItemsView:(TabBarPickerSubItemsView*) tabarPickerSubItemsView didSelect:(TabBarItem*) item;
+
+@end
 
 @interface TabBarPickerSubItemsView : UIView
 
+/**
+ *  <#Description#>
+ */
+@property (nonatomic, strong) NSMutableArray *itemsArray;
+
+/**
+ *  <#Description#>
+ */
+@property (nonatomic, assign) id<TabBarItemDelegate> delegate;
+
+/**
+ *  <#Description#>
+ *
+ *  @param items <#items description#>
+ *
+ *  @return <#return value description#>
+ */
+- (instancetype) initWithTabBarItems:(NSArray *) items;
 
 @end

Pod/Classes/TabBarPickerSubItemsView.m

@@ -11,13 +11,36 @@
 
 @implementation TabBarPickerSubItemsView
 
-- (instancetype) init {
+- (instancetype) initWithTabBarItems:(NSArray *) items {
     self = [self initForAutoLayout];
     
     if (self) {
-        
+        _itemsArray = [[NSMutableArray alloc] initWithArray:items];
     }
+    
+    [self updateConstraintsIfNeeded];
+    
     return self;
 }
 
+
+- (void) layoutSubviews {
+    
+    if ([self.constraints count] > 0) {
+        
+        [NSLayoutConstraint deactivateConstraints:self.constraints];
+        
+        for (TabBarItem *item in _itemsArray) {
+            for (TabBarSubItem *subItem in item.subItems) {
+                [subItem.constraints autoRemoveConstraints];
+            }
+        }
+    }
+    
+    [self autoMatchDimension:ALDimensionWidth toDimension:ALDimensionWidth ofView:self.superview withOffset:0 relation:NSLayoutRelationEqual];
+    [self autoSetDimension:ALDimensionHeight toSize:44];
+    
+    [self autoConstrainAttribute:ALEdgeTop toAttribute:ALMarginTop ofView:self.superview withOffset:self.superview.frame.size.height];
+}
+
 @end

Pod/Classes/TabBarSubItem.m

@@ -42,5 +42,14 @@
     [self layoutSubviews];
 }
 
+- (void) layoutSubviews {
+    
+    if ([self.constraints count] > 0) {
+        
+        [NSLayoutConstraint deactivateConstraints:self.constraints];
+        
+    }
+}
+
 
 @end