Extended TKState class to have an optional userInfo dictionary.

Declared additional constructor accepting userInfo as parameter and kept old constructor for backwards compatibility.

Code/TKState.h

@@ -32,7 +32,16 @@
 ///-----------------------
 
 /**
- Creates and returns a new state object with the specified name.
+ Creates and returns a new state object with the specified name and an optional userInfo dictionary.
+ 
+ @param name The name of the state. Cannot be blank.
+ @param userInfo An optional dictionary of user info.
+ @return A newly created state object with the specified name.
+ */
++ (instancetype)stateWithName:(NSString *)name userInfo:(NSDictionary *)userInfo;
+
+/**
+ Creates and returns a new state object with the specified name. This method uses stateWithName:userInfo: with nil as userInfo parameter.
  
  @param name The name of the state. Cannot be blank.
  @return A newly created state object with the specified name.
@@ -48,6 +57,11 @@
  */
 @property (nonatomic, copy, readonly) NSString *name;
 
+/**
+ An optional dictionary of user info.
+ */
+@property (nonatomic, copy, readonly) NSDictionary *userInfo;
+
 ///----------------------------------
 /// @name Configuring Block Callbacks
 ///----------------------------------

Code/TKState.m

@@ -22,6 +22,7 @@
 
 @interface TKState ()
 @property (nonatomic, copy, readwrite) NSString *name;
+@property (nonatomic, copy, readwrite) NSDictionary *userInfo;
 @property (nonatomic, copy) void (^willEnterStateBlock)(TKState *, TKTransition *);
 @property (nonatomic, copy) void (^didEnterStateBlock)(TKState *, TKTransition *);
 @property (nonatomic, copy) void (^willExitStateBlock)(TKState *, TKTransition *);
@@ -30,14 +31,20 @@ @interface TKState ()
 
 @implementation TKState
 
-+ (instancetype)stateWithName:(NSString *)name
++ (instancetype)stateWithName:(NSString *)name userInfo:(NSDictionary *)userInfo
 {
     if (! [name length]) [NSException raise:NSInvalidArgumentException format:@"The `name` cannot be blank."];
     TKState *state = [TKState new];
     state.name = name;
+    state.userInfo = userInfo;
     return state;
 }
 
++ (instancetype)stateWithName:(NSString *)name
+{
+    return [self stateWithName:name userInfo:nil];
+}
+
 - (NSString *)description
 {
     return [NSString stringWithFormat:@"<%@:%p '%@'>", NSStringFromClass([self class]), self, self.name];