Two minor improvements - findByTag and hidden type support like android

CSLinearLayoutView/CSLinearLayoutView.h

@@ -58,6 +58,7 @@ typedef enum {
 
 - (void)swapItem:(CSLinearLayoutItem *)firstItem withItem:(CSLinearLayoutItem *)secondItem;
 
+- (CSLinearLayoutItem*)findItemByTag:(NSInteger)tag;
 @end
 
 
@@ -85,14 +86,20 @@ typedef struct {
     CGFloat right;
 } CSLinearLayoutItemPadding;
 
+NS_ENUM(NSInteger, CSLinearLayoutItemVisibility) {
+    CSLinearLayoutItemHidden,             // Occupy the frame
+    CSLinearLayoutItemGone                // Missing in the layout
+};
+
 @interface CSLinearLayoutItem : NSObject
 
-@property (nonatomic, retain) UIView *view;
+@property (nonatomic, strong) UIView *view;
 @property (nonatomic, assign) CSLinearLayoutItemFillMode fillMode;
 @property (nonatomic, assign) CSLinearLayoutItemHorizontalAlignment horizontalAlignment;    // Use horizontalAlignment when the layout view is set to VERTICAL orientation
 @property (nonatomic, assign) CSLinearLayoutItemVerticalAlignment verticalAlignment;        // Use verticalAlignment when the layout view is set to HORIZONTAL orientation
+@property (nonatomic, assign) enum CSLinearLayoutItemVisibility hiddenType;                 // Apply when the layout view is set YES hidden
 @property (nonatomic, assign) CSLinearLayoutItemPadding padding;
-@property (nonatomic, assign) NSDictionary *userInfo;
+@property (nonatomic, weak) NSDictionary *userInfo;
 @property (nonatomic, assign) NSInteger tag;
 
 - (id)initWithView:(UIView *)aView;

CSLinearLayoutView/CSLinearLayoutView.m

@@ -10,6 +10,8 @@
 
 @interface CSLinearLayoutView()
 
+@property (nonatomic, readwrite) NSMutableArray *items;
+
 - (void)setup;
 - (void)adjustFrameSize;
 - (void)adjustContentSize;
@@ -22,7 +24,6 @@ @implementation CSLinearLayoutView
 @synthesize orientation = _orientation;
 @synthesize autoAdjustFrameSize = _autoAdjustFrameSize;
 @synthesize autoAdjustContentSize = _autoAdjustContentSize;
-
 #pragma mark - Factories
 
 - (id)init {
@@ -59,10 +60,8 @@ - (void)setup {
 
 
 #pragma mark - Lifecycle
-
 - (void)dealloc {
-    [_items release], _items = nil;
-    [super dealloc];
+    self.items = nil;
 }
 
 
@@ -75,6 +74,10 @@ - (void)layoutSubviews {
 
     for (CSLinearLayoutItem *item in _items) {
 
+        if (item.view.hidden && item.hiddenType == CSLinearLayoutItemGone) {
+            continue;
+        }
+
         CGFloat startPadding = 0.0;
         CGFloat endPadding = 0.0;
 
@@ -166,6 +169,10 @@ - (CGFloat)layoutOffset {
     CGFloat currentOffset = 0.0;
 
     for (CSLinearLayoutItem *item in _items) {
+        if (item.view.hidden && item.hiddenType == CSLinearLayoutItemGone) {
+            continue;
+        }
+
         if (_orientation == CSLinearLayoutViewOrientationHorizontal) {
             currentOffset += item.padding.left + item.view.frame.size.width + item.padding.right;
         } else {
@@ -210,12 +217,10 @@ - (void)removeItem:(CSLinearLayoutItem *)linearLayoutItem {
         return;
     }
 
-    [linearLayoutItem retain];
 
     [_items removeObject:linearLayoutItem];
     [linearLayoutItem.view removeFromSuperview];
 
-    [linearLayoutItem release];
 }
 
 - (void)removeAllItems {
@@ -264,12 +269,10 @@ - (void)moveItem:(CSLinearLayoutItem *)movingItem beforeItem:(CSLinearLayoutItem
         return;
     }
 
-    [movingItem retain];
     [_items removeObject:movingItem];
 
     NSUInteger existingItemIndex = [_items indexOfObject:existingItem];
     [_items insertObject:movingItem atIndex:existingItemIndex];
-    [movingItem release];
 
     [self setNeedsLayout];
 }
@@ -279,7 +282,6 @@ - (void)moveItem:(CSLinearLayoutItem *)movingItem afterItem:(CSLinearLayoutItem
         return;
     }
 
-    [movingItem retain];
     [_items removeObject:movingItem];
 
     if (existingItem == [_items lastObject]) {
@@ -288,7 +290,6 @@ - (void)moveItem:(CSLinearLayoutItem *)movingItem afterItem:(CSLinearLayoutItem
         NSUInteger existingItemIndex = [_items indexOfObject:existingItem];
         [_items insertObject:movingItem atIndex:++existingItemIndex];
     }
-    [movingItem release];
 
     [self setNeedsLayout];
 }
@@ -298,15 +299,13 @@ - (void)moveItem:(CSLinearLayoutItem *)movingItem toIndex:(NSUInteger)index {
         return;
     }
 
-    [movingItem retain];
     [_items removeObject:movingItem];
 
     if (index == ([_items count] - 1)) {
         [_items addObject:movingItem];
     } else {
         [_items insertObject:movingItem atIndex:index];
     }
-    [movingItem release];
 
     [self setNeedsLayout];
 }
@@ -323,6 +322,16 @@ - (void)swapItem:(CSLinearLayoutItem *)firstItem withItem:(CSLinearLayoutItem *)
     [self setNeedsLayout];
 }
 
+- (CSLinearLayoutItem*)findItemByTag:(NSInteger)tag
+{
+    for (CSLinearLayoutItem *item in _items) {
+        if (item.tag == tag) {
+            return item;
+        }
+    }
+    return nil;
+}
+
 @end
 
 #pragma mark -
@@ -353,6 +362,7 @@ - (id)initWithView:(UIView *)aView {
     self = [super init];
     if (self) {
         self.view = aView;
+        self.tag = aView.tag;
         self.horizontalAlignment = CSLinearLayoutItemHorizontalAlignmentLeft;
         self.verticalAlignment = CSLinearLayoutItemVerticalAlignmentTop;
         self.fillMode = CSLinearLayoutItemFillModeNormal;
@@ -361,17 +371,15 @@ - (id)initWithView:(UIView *)aView {
 }
 
 + (CSLinearLayoutItem *)layoutItemForView:(UIView *)aView {
-    CSLinearLayoutItem *item = [[[CSLinearLayoutItem alloc] initWithView:aView] autorelease];
+    CSLinearLayoutItem *item = [[CSLinearLayoutItem alloc] initWithView:aView];
     return item;
 }
 
 #pragma mark - Memory Management
 
 - (void)dealloc {
-    self.view = nil;
     self.userInfo = nil;
 
-    [super dealloc];
 }