CODEWITHSUNDEEP
objective-cxcode
user1597438
user1597438

Reputation: 2221

Change button text with random values using Objective-C

I am new to Objective-C and X-Code and basically programming in iOS so this may be a very simple question. Anyway, I'm trying to make a logo quiz wherein the logos and the choices are generated in random order i.e. (Logo 1) --- Choices: A B C D for the first try. Then the next time the user opens the app, Logo 4 appears first with choices A D B C. (I hope that's clear). I've managed to randomly display the logos but can't figure out how to do the same for the choices which would modify the value of 4 buttons below the logo.

From what I've search, you use something like:

 [btnA setTitle:@"answer" forState:UIControlStateNormal];

My problem is, I'm thinking of putting the choices into an array as well so I tried something such as this:

[btnA setTitle:[answerArray objectAtIndex:i] forState:UIControlStateNormal];]

Similar to what I've done for the logos but I'm not getting any values for the button. Is there something I'm missing here? I don't get any errors either. Here's a part of my code that might better explain what I've been trying to do:

NSMutableArray *answerList = [[NSMutableArray alloc] initWithObjects:
                               @"AnswerA",
                               @"AnswerB",
                               @"AnswerC",
                               nil];
answerArray = answerList;
int i = arc4random() % [answerArray count];
[self.btn1 setTitle:[answerArray objectAtIndex:i] forState:UIControlStateNormal];
[self.btn2 setTitle:[answerArray objectAtIndex:i] forState:UIControlStateNormal];
[self.btn3 setTitle:[answerArray objectAtIndex:i] forState:UIControlStateNormal];

Upvotes: 0

Views: 2237

Answers (2)

Paresh Navadiya
Paresh Navadiya

Reputation: 38249

Just Shuffle your buttonTitleArray which is MutableArray without repeating any same logo quiz using this link.

Also Shuffle logo quiz's choice to make it interactive with above link.

Upvotes: 1

Nirav Bhatt
Nirav Bhatt

Reputation: 6969

See following code - it can generate random title from set of 100:

-(int)getRandomNumber:(int)fromVal to:(int)toVal {
    return (int)fromVal + arc4random() % (toVal-fromVal+1);
}

-(void) setButtonTitle
{
    NSArray * buttonTitleArray = [NSArray arrayWithObjects:@"title1", @"title2",... @"title100", nil};
    int x = [getRandomNumber :0 :100];
    NSString * title = [buttonTitleArray objectAtIndex:x];
    [button setTitle:title :forState:UIControlStateNormal];
}

Upvotes: 1

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