Hit button once to show UIImage. Hit button again to hide UIImage

Question

I researched on this website but couldn't find anything to help me. I'm a beginner in coding so this may seem simple to some of you but hard for me. I have an instruction button in my game that i press to show a speech bubble giving the user instruction. I am trying to achieve, when I repress the instruction button, the speech bubble should disappear.

.h

IBOutlet UIImageView *instructionsPic;
- (IBAction)instructionAction;

.m

    - (IBAction)instructionAction {
    instructionsPic.hidden = NO;
    startGameButton.hidden = YES;
}

In my viewDidLoad i marked my instruction bubble speech as hidden and when the user hits the instruction button it shows up. So yea, how can i make it disappear again when they click the button again?

Check the the property instructionsPic.hidden to see if it is hidden, if so set it to YES. Or simply: instructionsPic.hidden = ! instructionsPic.hidden; — zaph, Commented Jun 27, 2015 at 21:02

tek3 · Accepted Answer · 2015-06-27 21:03:55Z

1

You have to toggle the hidden property of your 'instructionsPic' each time 'instruction' button is pressed.

You can change your IBAction method to :

- (IBAction)instructionAction {
instructionsPic.hidden = !instructionsPic.hidden;
startGameButton.hidden = !startGameButton.hidden;
}

I leave it upto you to understand the logic used here.

answered Jun 27, 2015 at 21:03

tek3

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Sweet it worked. I wasn't aware of that ! function. Thank you! I will mark as accepted once i can :)
– user3763526
Commented Jun 27, 2015 at 21:08
'!' is ' logical Not operator'. It inverts whatever Bool value is given to it. You can read more about it here. cs.mtu.edu/~shene/COURSES/cs201/NOTES/chap03/logical.html.
– tek3
Commented Jun 27, 2015 at 21:11
1

@user3763526 Get a book on the "C" language and study it. Objective-C supports all of C and a lot of other languages are built on much of the same operators and syntax.
– zaph
Commented Jun 27, 2015 at 21:18

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