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    Syntax

    Objective C syntax

    Intro

    Objective-C was a language introduced by apple for developing software on OS X and iOS, apple platforms.

    Syntax

    Add ; to every line like the old days of C, C++ days.

    printf("Hello World");

    In Objective C:

    NSLog(@"Hello, World!");

    In Objective C with variables:

    NSString * myString = @"Hello World";
NSLog(@"%@", myString);

    print with Boolean value

    BOOL success = NO
NSLog(@"State machine should Fire: YES OR NO - %@ ", success ? @"YES" : @"NO");

    print with Integer or Long value

    BOOL tempValue = 124125
NSLog(@"Printing integer value: %ld ", (long)tempValue);

    String Array

    NSString *allEvents = [[event.sourceStates valueForKey:@"name"] componentsJoinedByString:@", "]]

    Array

    @property (nonatomic, copy, readwrite) NSArray *sourceStates;

    Set ?

    @property (nonatomic, strong) NSMutableSet *mutableStates;

    Computed Property?

    - (NSSet *)states
{
    return [NSSet setWithSet:self.mutableStates];
}

    Function

    - (void)setCurrentState:(CustomState *)currentState
{
}

    Boolean

    return NO 
return YES

    Pointers

    - (BOOL)fireEvent:(id)eventName uInfo:(NSDictionary *)uInfo error:(NSError *__autoreleasing *)error
{
	if (error) *error = [NSError errorWithDomain:TKErrorDomain code:TKInvalidTransitionError userInfo:userInfo];

	return NO;
}

    Dictionary

    NSString *failureReason = [NSString stringWithFormat:@"An attempt was made to '%@' while in the '%@'", event.name, self.currentState.name;

NSDictionary *userInfo = @{ NSLocalizedDescriptionKey: @"The event cannot be fired from the current state.", NSLocalizedFailureReasonErrorKey: failureReason };