Upon click - randomly show message?

[andreasb]

Hello!
I`m trying to create an application which;

- Has 1 button named "Click me!".
- Has 1 empty label.

When the "Click me!" button is pressed, the empty label should randomly show 1 message out of a list with 20 messages.

How can this be done?
And is it possible to make the user be able to click the button only twice pr. day? So that the user can only view 2 messages pr. 24 hours?

Didn`t know whether I should post this here or in the Tutorial Request, but I took a chance .

Thanks a lot !

[andreasb]

Just found out another way to do this.
With NSArray you can make a list with several phrases and have them "randomly" printed to a label.
How do I do this?

[rywola]

Originally Posted by andreasb

Just found out another way to do this.
With NSArray you can make a list with several phrases and have them "randomly" printed to a label.
How do I do this?

Well, I am assuming you want it to show more then the phrase and have an action occur accordingly with the label (like I just did) - in which case you would want each action to be defined seperately and just include the label text change. Even if you don't want to NOW, I think this may be a better way because as you excel more you may want to include actions with this randomicity.

@interface{
IBOutlet UILabel *mylabel
}
-(IBAction)switchlabela:(id)sender;
-(IBAction)switchlabelb:(id)sender;
-(IBAction)randomswitchlabel:(id)sender;

Then, in the implementation - define the action accordingly:

-(IBAction)switchlabela:(id)sender
{
[mylabel.text = @"phrasea"];
//rest of action b
}
-(IBAction)switchlabelb:(id)sender
{
[mylabel.text = @"phraseb"];
//rest of action b
}
-(IBAction)randomswitchlabel:(id)sender
{
	NSLog(@"randomswitchlabel");
	NSArray *randomlabelarray = [NSArray arrayWithObjects: @"switchlabela:", @"switchlabelb:", nil];
	int randomnumber = arc4random()%[randomlabelarray count];
	NSString *randomaction = [randomlabelarray objectAtIndex: randomnumber];
	SEL randomselector = NSSelectorFromString(randomaction);
	[self performSelector:randomselector withObject:nil];
}

i learned this courtesy of this forum as well.

[andreasb]

Originally Posted by rywola

Well, I am assuming you want it to show more then the phrase and have an action occur accordingly with the label (like I just did) - in which case you would want each action to be defined seperately and just include the label text change. Even if you don't want to NOW, I think this may be a better way because as you excel more you may want to include actions with this randomicity.

@interface{
IBOutlet UILabel *mylabel
}
-(IBAction)switchlabela:(id)sender;
-(IBAction)switchlabelb:(id)sender;
-(IBAction)randomswitchlabel:(id)sender;

Then, in the implementation - define the action accordingly:

-(IBAction)switchlabela:(id)sender
{
[mylabel.text = @"phrasea"];
//rest of action b
}
-(IBAction)switchlabelb:(id)sender
{
[mylabel.text = @"phraseb"];
//rest of action b
}
-(IBAction)randomswitchlabel:(id)sender
{
	NSLog(@"randomswitchlabel");
	NSArray *randomlabelarray = [NSArray arrayWithObjects: @"switchlabela:", @"switchlabelb:", nil];
	int randomnumber = arc4random()%[randomlabelarray count];
	NSString *randomaction = [randomlabelarray objectAtIndex: randomnumber];
	SEL randomselector = NSSelectorFromString(randomaction);
	[self performSelector:randomselector withObject:nil];
}

i learned this courtesy of this forum as well.

Thanks for this!
All I want is to be able to push a button and get a randomized phrase from a list I´ve made.



I get this when I try it .

[rywola]

Originally Posted by andreasb

Thanks for this!
All I want is to be able to push a button and get a randomized phrase from a list I´ve made.



I get this when I try it .

Are you sure you added the 3 actions into the header?

[rywola]

Originally Posted by andreasb

Thanks for this!
All I want is to be able to push a button and get a randomized phrase from a list I´ve made.



I get this when I try it .

Are you sure you added the 3 actions into the header?

*try replacing the "mylabel.text:"s with "mylabel.text = "s

**or: mylabel.text = [NSString stringWithFormat:@"phrase"];

I ALMOST GAURANTEE that one of those 2 things should work.

[andreasb]

"Are you sure you added the 3 actions into the header?":

What do you mean by that?

[rywola]

Originally Posted by andreasb

"Are you sure you added the 3 actions into the header?":

What do you mean by that?

well, in the [header] .h file (under classes), make sure you have the 3 actions that i wrote in the original response to go into the [header] .h. I do not believe that is the problem after looking at your code though, it looks like you miscopied some of what i wrote: i.e. you wrote mylabel:@"phrasea" and mylabel:@"phraseb" instead of mylabel = @"phrasea" and mylabel = @"phrase b". that should now work if you hook up the randomaction to the button.


*remove the brackets. that should finish 'er off.

[kelvinkao]

Watch out for your Objective-C syntax, man:

[mylabel.text=@"phrasea"];
should be written as
mylabel.text = @"phrasea";
or
[mylabel setText:@"phrasea"];

[andreasb]

kelvinkao:

Thank you! That fixed everything .

[rywola]

Originally Posted by andreasb

kelvinkao:

Thank you! That fixed everything .

just so you know, i mentioned that removal of brackets a few posts ago no worries tho... just don't skim

[kelvinkao]

Originally Posted by rywola

just so you know, i mentioned that removal of brackets a few posts ago no worries tho... just don't skim

Haha, yeah, I noticed that too after I posted. Your reply was one minute earlier, hehe.

[rywola]

Originally Posted by kelvinkao

Haha, yeah, I noticed that too after I posted. Your reply was one minute earlier, hehe.

aha, well I guess you came in at the right time to steal my glory haha

[kelvinkao]

Originally Posted by rywola

aha, well I guess you came in at the right time to steal my glory haha

You don't snooze, you lost.

[andreasb]

Haha, thanks to you both!
And Rywola, without your post I would never be able to make this! ˆˆ,

[rywola]

Originally Posted by andreasb

Haha, thanks to you both!
And Rywola, without your post I would never be able to make this! ˆˆ,

yeah, no problem. keep in mind you can add any actions to those two phrase threads to get a little more advanced or add more actions/labels if you follow the 'pattern'

[andreasb]

Yeah! Thanks !
I´ll start by adding more phrases.

Thanks a lot, both of you!