// Create TTGTextTagCollectionView view
TTGTextTagCollectionView *tagCollectionView = [[TTGTextTagCollectionView alloc] initWithFrame:CGRectMake(20, 20, 200, 200)];
[self.view addSubview:tagCollectionView];
// Create TTGTextTag object
TTGTextTag *textTag = [TTGTextTag tagWithContent:[TTGTextTagStringContent contentWithText:@"Some text"] style:[TTGTextTagStyle new]];
// Add tag
[tagCollectionView addTag:textTag];

@protocol TTGTextTagCollectionViewDelegate <NSObject>
@optional
- (BOOL)textTagCollectionView:(TTGTextTagCollectionView *)textTagCollectionView
                    canTapTag:(TTGTextTag *)tag
                      atIndex:(NSUInteger)index;

- (void)textTagCollectionView:(TTGTextTagCollectionView *)textTagCollectionView
                    didTapTag:(TTGTextTag *)tag
                      atIndex:(NSUInteger)index;

- (void)textTagCollectionView:(TTGTextTagCollectionView *)textTagCollectionView
            updateContentSize:(CGSize)contentSize;
@end

@interface TTGTextTag : NSObject <NSCopying>

/// ID
@property (nonatomic, assign, readonly) NSUInteger tagId; // Auto increase. The only identifier and main key for a tag

/// Attachment object. You can use this to bind any object you want to each tag.
@property (nonatomic, strong) id _Nullable attachment;

/// Normal state content and style
@property (nonatomic, copy) TTGTextTagContent * _Nonnull content;
@property (nonatomic, copy) TTGTextTagStyle * _Nonnull style;

/// Selected state content and style
@property (nonatomic, copy) TTGTextTagContent * _Nullable selectedContent;
@property (nonatomic, copy) TTGTextTagStyle * _Nullable selectedStyle;

/// Selection state
@property (nonatomic, assign) BOOL selected;

///...Other things...

@end

// Normal Text
@interface TTGTextTagStringContent : TTGTextTagContent
/// Text
@property (nonatomic, copy) NSString * _Nonnull text;
/// Text font
@property (nonatomic, copy) UIFont * _Nonnull textFont;
/// Text color
@property (nonatomic, copy) UIColor * _Nonnull textColor;
@end

// NSAttributedString Text
@interface TTGTextTagAttributedStringContent : TTGTextTagContent
/// Attributed text
@property (nonatomic, copy) NSAttributedString * _Nonnull attributedText;
@end

@interface TTGTextTagStyle : NSObject <NSCopying>

/// Background color
@property (nonatomic, copy) UIColor * _Nonnull backgroundColor; // Default is [UIColor lightGrayColor]

/// Text alignment
@property (nonatomic, assign) NSTextAlignment textAlignment; // Default is NSTextAlignmentCenter

/// Gradient background color
@property (nonatomic, assign) BOOL enableGradientBackground; // Default is NO
@property (nonatomic, copy) UIColor * _Nonnull gradientBackgroundStartColor;
@property (nonatomic, copy) UIColor * _Nonnull gradientBackgroundEndColor;
@property (nonatomic, assign) CGPoint gradientBackgroundStartPoint;
@property (nonatomic, assign) CGPoint gradientBackgroundEndPoint;

/// Corner radius
@property (nonatomic, assign) CGFloat cornerRadius; // Default is 4
@property (nonatomic, assign) Boolean cornerTopRight;
@property (nonatomic, assign) Boolean cornerTopLeft;
@property (nonatomic, assign) Boolean cornerBottomRight;
@property (nonatomic, assign) Boolean cornerBottomLeft;

/// Border
@property (nonatomic, assign) CGFloat borderWidth; // Default is [UIColor whiteColor]
@property (nonatomic, copy) UIColor * _Nonnull borderColor; // Default is 1

/// Shadow.
@property (nonatomic, copy) UIColor * _Nonnull shadowColor;    // Default is [UIColor blackColor]
@property (nonatomic, assign) CGSize shadowOffset;   // Default is (2, 2)
@property (nonatomic, assign) CGFloat shadowRadius;  // Default is 2f
@property (nonatomic, assign) CGFloat shadowOpacity; // Default is 0.3f

/// Extra space in width and height, will expand each tag's size
@property (nonatomic, assign) CGSize extraSpace;

/// Max width for a text tag. 0 and below means no max width.
@property (nonatomic, assign) CGFloat maxWidth;
/// Min width for a text tag. 0 and below means no min width.
@property (nonatomic, assign) CGFloat minWidth;

/// Max height for a text tag. 0 and below means no max height.
@property (nonatomic, assign) CGFloat maxHeight;
/// Min height for a text tag. 0 and below means no min height.
@property (nonatomic, assign) CGFloat minHeight;

/// Exact width. 0 and below means no work
@property (nonatomic, assign) CGFloat exactWidth;
/// Exact height. 0 and below means no work
@property (nonatomic, assign) CGFloat exactHeight;

@end

// TTGTextTagCollectionView.h
// Define if the tag can be selected.
@property (assign, nonatomic) BOOL enableTagSelection;

// Tags scroll direction, default is vertical.
@property (nonatomic, assign) TTGTagCollectionScrollDirection scrollDirection;

// Tags layout alignment, default is left.
@property (nonatomic, assign) TTGTagCollectionAlignment alignment;

// Number of lines. 0 means no limit, default is 0 for vertical and 1 for horizontal.
@property (nonatomic, assign) NSUInteger numberOfLines;

// Tag selection limit, default is 0, means no limit
@property (nonatomic, assign) NSUInteger selectionLimit;

// Horizontal and vertical space between tags, default is 4.
@property (assign, nonatomic) CGFloat horizontalSpacing;
@property (assign, nonatomic) CGFloat verticalSpacing;

// Content inset, default is UIEdgeInsetsMake(2, 2, 2, 2).
@property (nonatomic, assign) UIEdgeInsets contentInset;

// The true tags content size, readonly
@property (nonatomic, assign, readonly) CGSize contentSize;

// Manual content height
// Default = NO, set will update content
@property (nonatomic, assign) BOOL manualCalculateHeight;
// Default = 0, set will update content
@property (nonatomic, assign) CGFloat preferredMaxLayoutWidth;

// Scroll indicator
@property (nonatomic, assign) BOOL showsHorizontalScrollIndicator;
@property (nonatomic, assign) BOOL showsVerticalScrollIndicator;

typedef NS_ENUM(NSInteger, TTGTagCollectionAlignment) {
    TTGTagCollectionAlignmentLeft = 0,                           // Default
    TTGTagCollectionAlignmentCenter,                             // Center
    TTGTagCollectionAlignmentRight,                              // Right
    TTGTagCollectionAlignmentFillByExpandingSpace,               // Expand horizontal spacing and fill
    TTGTagCollectionAlignmentFillByExpandingWidth,               // Expand width and fill
    TTGTagCollectionAlignmentFillByExpandingWidthExceptLastLine, // Expand width and fill, except last line
};

// TTGTextTagCollectionView.h
/// Add
- (void)addTag:(TTGTextTag *)tag;
- (void)addTags:(NSArray 
    *)tags;
  

// TTGTextTagCollectionView.h
/// Insert
- (void)insertTag:(TTGTextTag *)tag atIndex:(NSUInteger)index;
- (void)insertTags:(NSArray 
    *)tags atIndex:(
   NSUInteger)index;
  

// TTGTextTagCollectionView.h
/// Update
- (void)updateTagAtIndex:(NSUInteger)index selected:(BOOL)selected;
- (void)updateTagAtIndex:(NSUInteger)index withNewTag:(TTGTextTag *)tag;

// TTGTextTagCollectionView.h
// Remove tag
- (void)removeTag:(TTGTextTag *)tag;
- (void)removeTagById:(NSUInteger)tagId;
- (void)removeTagAtIndex:(NSUInteger)index;
- (void)removeAllTags;

// TTGTextTagCollectionView.h
/// Get tag
- (TTGTextTag *)getTagAtIndex:(NSUInteger)index;
- (NSArray 
    *)getTagsInRange:(
   NSRange)range;


   /// Get all
- (
   NSArray 
   
     *)allTags;
- (
    NSArray 
    
      *)allSelectedTags;
- (
     NSArray 
     
       *)allNotSelectedTags;
     
    
   
  

// TTGTextTagCollectionView.h
- (void)reload;

// TTGTextTagCollectionView.h
- (NSInteger)indexOfTagAt:(CGPoint)point;

@protocol TTGTagCollectionViewDataSource <NSObject>
@required
- (NSUInteger)numberOfTagsInTagCollectionView:(TTGTagCollectionView *)tagCollectionView;

- (UIView *)tagCollectionView:(TTGTagCollectionView *)tagCollectionView tagViewForIndex:(NSUInteger)index;
@end

@protocol TTGTagCollectionViewDelegate <NSObject>
@required
- (CGSize)tagCollectionView:(TTGTagCollectionView *)tagCollectionView sizeForTagAtIndex:(NSUInteger)index;

@optional
- (BOOL)tagCollectionView:(TTGTagCollectionView *)tagCollectionView shouldSelectTag:(UIView *)tagView atIndex:(NSUInteger)index;

- (void)tagCollectionView:(TTGTagCollectionView *)tagCollectionView didSelectTag:(UIView *)tagView atIndex:(NSUInteger)index;

- (void)tagCollectionView:(TTGTagCollectionView *)tagCollectionView updateContentSize:(CGSize)contentSize;
@end

// TTGTagCollectionView.h
// Tags scroll direction, default is vertical.
@property (nonatomic, assign) TTGTagCollectionScrollDirection scrollDirection;

// Tags layout alignment, default is left.
@property (nonatomic, assign) TTGTagCollectionAlignment alignment;

// Number of lines. 0 means no limit, default is 0 for vertical and 1 for horizontal.
@property (nonatomic, assign) NSUInteger numberOfLines;

// Horizontal and vertical space between tags, default is 4.
@property (nonatomic, assign) CGFloat horizontalSpacing;
@property (nonatomic, assign) CGFloat verticalSpacing;

// Content inset, default is UIEdgeInsetsMake(2, 2, 2, 2).
@property (nonatomic, assign) UIEdgeInsets contentInset;

// The true tags content size, readonly
@property (nonatomic, assign, readonly) CGSize contentSize;

// Manual content height
// Default = NO, set will update content
@property (nonatomic, assign) BOOL manualCalculateHeight;
// Default = 0, set will update content
@property (nonatomic, assign) CGFloat preferredMaxLayoutWidth;

// Scroll indicator
@property (nonatomic, assign) BOOL showsHorizontalScrollIndicator;
@property (nonatomic, assign) BOOL showsVerticalScrollIndicator;

// TTGTagCollectionView.h
- (void)reload;

// TTGTagCollectionView.h
- (NSInteger)indexOfTagAt:(CGPoint)point;