Question

hi im creating a app that generates random text when i press a button at the moment i have the code and it works fine but there are some things i would like to change when i run the app and i press the button it shows:

“alright, hiya, yoo, yoo, Hello, alright, Hiya, yoo, yoo, hiya, hello, hello, alright”

thats the first 13 clicks and thats the order every time i go on the app. Basically i dont want them to repeat twice in a row and also i want them to start in different orders when i start the app.

1 more thing i would like to be able to write at least 2 lines of text but how do i do that using a Label?

heres the code i have:

.h

@interface ViewController1 : UIViewController  {

    IBOutlet UILabel *textview;

}

-(IBAction)random;

.m

@interface ViewController1 ()

@end

@implementation ViewController1

-(IBAction)random {

int text = rand() % 5;

switch (text) {

    case 0:

        textview.text = @"Hello";

        break;

    case 1:

        textview.text = @"hi";

        break;

    case 2:

        textview.text = @"alright";

        break;

    case 3:

        textview.text = @"yoo";

        break;

    case 4:

        textview.text = @"hiya";

        break;

    default:

        break;

}

}

thank you 🙂

Answer 1

Use the function arc4random() instead of random(). The problem you face is because the function rand needs a seed to be set before you call it. This is a starting value for the random number generator used in the background by rand. When you don’t use a own seed it’s always the same default, and you therefore always get the same sequence of random values. When using arc4random there is no need for setting a seed. For further information see this blog post and the documentation.

#include <stdlib.h>
...
int text = arc4random() % 5;