[Nickel]

Hi, I'm trying to make an iPhone app that displays text when you press a button. I'm using this code:

[display setStringValue:@"Hello World"];

However, when I run it the app freezes, with the button down not allowing me to exit the app.

I'm assuming that code may only be Cocoa and not Cocoa Touch. Can someone let me know what code I should use?
Thanks in advance.

[sergiu.burlacu]

Hi Nickel,
Any iPhone app has an UIView at it's base, the UIView does not have the property to display text it does not know how to.
Instead use an UILabel/UITextViewController anything with a text property to add on your UIView.
And when you press the button you should tell your label/controller to display the text.

Regards,
Sergiu.

[Diskordia]

Is a bit less to tell you more. Is it exactly this line of code, or can you tell us in which context you call this line?

[Nickel]

Thanks for the response. So I made a UILabelController.
Do I keep the display outlet in my main or put it in Label Controller?
What do I connect the display outlet to?
Is this code right?:

[display setStringValue:@"Hello World"];

Or what should I change.

Thanks.

[Diskordia]

Originally Posted by Nickel

Thanks for the response. So I made a UILabelController.
Do I keep the display outlet in my main or put it in Label Controller?
What do I connect the display outlet to?
Is this code right?:

[display setStringValue:@"Hello World"];

Or what should I change.

Thanks.

I guess you have an UILabel outlet

IBOutlet UILabel display;

and you connected it in the IB with the label.
Than you defineed an IBAction

 - (IBAction)buttonPressed:(id)sender;

and also connect it in the IB with the button.

If you have not done that, you can set the text in the display variable as often as you want, it will not have any effect!
If you did everything right, you have an implementation of the IBAction which might look like following:

- (IBAction)buttonPressed:(id)sender {
    display.text = @"Hello World";
}