- Fix autolayout management

Pod/Classes/TabBarItem.m

@@ -14,6 +14,7 @@
 
 @property (nonatomic, strong) UIButton *itemButton;
 @property (nonatomic) UIDeviceOrientation orientation;
+@property (nonatomic, assign) BOOL didSetupConstraints;
 
 @end
 
@@ -45,10 +46,12 @@
 - (void) layoutSubviews {
     
     //[_itemButton autoPinEdgesToSuperviewMargins];
+    if (!_didSetupConstraints) {
     [_itemButton autoCenterInSuperview];
     [_itemButton autoMatchDimension:ALDimensionHeight toDimension:ALDimensionHeight ofView:self];
     [_itemButton autoMatchDimension:ALDimensionWidth toDimension:ALDimensionWidth ofView:self];
-    
+        _didSetupConstraints = YES;
+    }
 }
 
 - (void)deviceOrientationDidChange:(NSNotification *)notification {

Pod/Classes/TabBarPicker.m

@@ -19,6 +19,7 @@
 @property (nonatomic) NSUInteger subItemRows;
 @property (nonatomic, strong) TabBarPickerSubItemsView *subItemSelector;
 @property (nonatomic) BOOL show;
+@property (nonatomic, assign) BOOL didSetupConstraints;
 
 @end
 
@@ -89,14 +90,15 @@
 
 - (void) layoutSubviews {
     
-    if ([self.constraints count] > 0) {
+    /*if ([self.constraints count] > 0) {
      
      [NSLayoutConstraint deactivateConstraints:self.constraints];
      [NSLayoutConstraint deactivateConstraints:_subItemSelector.constraints];
      for (TabBarItem *item in _tabBarItems) {
      [item.constraints autoRemoveConstraints];
      }
-    }
+     }*/
+    if (!_didSetupConstraints) {
         
         switch (_position) {
             case TabBarPickerPositionLeft:{
@@ -142,10 +144,7 @@
                 break;
             case TabBarPickerPositionBottom:
             default:{
-            if (!_show) {
                 
-            }
-            else {
                 [self autoPinEdgeToSuperviewMargin:ALEdgeBottom];
                 [self autoSetDimension:ALDimensionHeight toSize:44];
                 [self autoMatchDimension:ALDimensionWidth toDimension:ALDimensionWidth ofView:self.superview withOffset:0 relation:_layoutRelation];
@@ -157,17 +156,16 @@
                 
                 [_tabBarItems autoDistributeViewsAlongAxis:ALAxisHorizontal alignedTo:ALAttributeHorizontal withFixedSpacing:_itemSpacing insetSpacing:YES matchedSizes:YES];
             }
-        }
                 break;
         }
         
-    [self updateConstraintsIfNeeded];
+        
         
         [_subItemSelector layoutSubviews];
+        _didSetupConstraints = YES;
         
-    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(4 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
+        [self updateConstraintsIfNeeded];
-        [self show];
+    }
-    });
 }
 
 - (void) setPosition:(TabBarPickerPosition)position {

Pod/Classes/TabBarPickerSubItemsView.m

@@ -9,11 +9,15 @@
 #import "TabBarPickerSubItemsView.h"
 #import <PureLayout/PureLayout.h>
 
+#define DEFAULT_ITEM_HEIGHT 44
+
 @interface TabBarPickerSubItemsView()
 
 @property (nonatomic) NSUInteger itemsPerRow;
+@property (nonatomic) CGFloat itemHeight;
 @property (nonatomic) NSUInteger rows;
 @property (nonatomic, strong) UICollectionView *subItemCollectionView;
+@property (nonatomic, assign) BOOL didSetupConstraints;
 
 @end
 
@@ -25,7 +29,7 @@
     if (self) {
         _itemsPerRow = itemsPerRow;
         _itemsArray = [[NSMutableArray alloc] initWithArray:items];
-        
+        _itemHeight = DEFAULT_ITEM_HEIGHT;
         _rows = 0;
         
         for (TabBarItem *item in _itemsArray) {
@@ -33,7 +37,8 @@
                 _rows = ceil(([[item subItems] count]/_itemsPerRow));
             }
         }
-        [self setBackgroundColor:[UIColor whiteColor]];
+        
+        [self setBackgroundColor:[UIColor redColor]];
         /*_subItemCollectionView = [[UICollectionView alloc] initForAutoLayout];
          [_subItemCollectionView setPagingEnabled:YES];
          [_subItemCollectionView setDelegate:self];
@@ -50,7 +55,7 @@
 
 - (void) layoutSubviews {
     
-    if ([self.constraints count] > 0) {
+    /*if ([self.constraints count] > 0) {
      
      [NSLayoutConstraint deactivateConstraints:self.constraints];
      
@@ -59,14 +64,18 @@
      [subItem.constraints autoRemoveConstraints];
      }
      }
-    }
+     }*/
-    [self autoConstrainAttribute:ALEdgeTop toAttribute:ALMarginTop ofView:self.superview withOffset:self.superview.frame.size.height];
+    if (!_didSetupConstraints) {
+        
+        [self autoPinEdgeToSuperviewEdge:ALEdgeBottom withInset:-(_rows*_itemHeight)];
         [self autoMatchDimension:ALDimensionWidth toDimension:ALDimensionWidth ofView:self.superview withOffset:0 relation:NSLayoutRelationEqual];
-    [self autoSetDimension:ALDimensionHeight toSize:_rows*44];
+        [self autoSetDimension:ALDimensionHeight toSize:_rows*_itemHeight];
         
         [_subItemCollectionView autoMatchDimension:ALDimensionWidth toDimension:ALDimensionWidth ofView:self];
         [_subItemCollectionView autoMatchDimension:ALDimensionHeight toDimension:ALDimensionHeight ofView:self];
         [_subItemCollectionView setBackgroundColor:[UIColor redColor]];
+        _didSetupConstraints = YES;
+    }
 }
 
 @end

Pod/Classes/TabBarSubItem.m

@@ -12,6 +12,7 @@
 @interface TabBarSubItem()
 
 @property (nonatomic) UIDeviceOrientation orientation;
+@property (nonatomic, assign) BOOL didSetupConstraints;
 
 @end
 
@@ -52,10 +53,16 @@
 
 - (void) layoutSubviews {
     
-    if ([self.constraints count] > 0) {
+    /*if ([self.constraints count] > 0) {
         
         [NSLayoutConstraint deactivateConstraints:self.constraints];
         
+    }*/
+    
+    if (_didSetupConstraints) {
+        
+        
+        _didSetupConstraints = YES;
     }
 }