Coding a button to chose random user defined words ?

Question

Yep as the title says for I need write a code for a button which it chooses random values and show it on screen(on a label maybe).This is just a one part of my project which I need to do it for my homework and because that I dont have much time I decided come and ask here.
Let me explain my project first.I have one button at the bottom and one label at the top(or any other object you say).I need to define 5 different situations inside the code like situation A situation B ....C....D...E.... etc. and when I click the button it will display randomly selected situation.
Example
I run the app
Click
A
click again
B
Close the app
Open the app again
Click
H
just like this
Help is needed guys please.
Thanks...

Answer 1

I found this code on the net and tried it it worked but its for mac development so I cant use it.I tried to change it for ios but I failed maybe it will give you some idea.
The programmer named its class as RuFact
@interface RUFacts : NSObject {
    IBOutlet textField;
- (IBAction)reset:(id)sender;
- (IBAction)set5:(id)sender;
@end
@interface RUFacts : NSObject {
    IBOutlet UITextField *textField;
- (IBAction)reset:(id)sender;
- (IBAction)setTo5:(id)sender;
@end
#import "RuFactsViewController.h"
@implementation RUFacts
- (IBAction)reset:(id)sender {
    [textField setIntValue:0];
- (IBAction)setTo5:(id)sender {
    int random_num;
    random_num = (arc4random() % 7 - 1) + 1;
    if (random_num == 1)
        [textField setStringValue:@"Hello1"];
    else if (random_num == 2)
        [textField setStringValue:@"Hello2"];
    else if (random_num == 3)
        [textField setStringValue:@"Hello3"];
    else if (random_num == 4)
        [textField setStringValue:@"Hello4"];
    else if (random_num == 5)
        [textField setStringValue:@"Hello5"];
    else if (random_num == 6)
        [textField setStringValue:@"Hello6"];
    else if (random_num == 7)
        [textField setStringValue:@"Hello7"];
@end
This is the modified version of the code for ios every thing works fine with this code but it gives me interface error on
[textField setIntValue:0];
any ideas ???