Need help with string concatenation please

[guyddor]

Hi,

I want to develop an app that will take the value from UITextField and use it
in a url like that:

http://www. the value from UITextField .com/

How do I do that?

[dejo]

Use NSString's stringByAppendingString: or stringByAppendingFormat:

[zrbecker]

This should work.

NSString urlString = [NSString stringWithFormat:"http://www.%@.com/", myUITextBox.text];

[moral-hazard]

This should work.

NSString *urlString = [NSString stringWithFormat:"http://www.%@.com/", myUITextBox.text];

I'll second this approach (with the minor correction I added :p). +stringWithFormat is good because it gives you an autoreleased string.

[guyddor]

The button get stuck

What to do?

[dejo]

What to do?
Explain the issue in more detail. Like, what do you mean the button got "stuck"? Any errors or warning, run-time or build? Perhaps include the button-action code...

[guyddor]

Look at the attachment file

[dejo]

Perhaps include the button-action code...
Restated.

[moral-hazard]

Your program appears to be crashing. Check the stack trace. I've only seen buttons get stuck like that on a crash.

[guyddor]

What to do?

Edit:

I got 2 warnings:

-passing argument 1 of 'stringWithFormat': from incompatible pointer type

-unused variable 'urlString'

[dejo]

What to do?
Keep asking for help without providing any code? ;)

[guyddor]

#import "MainView.h"

@implementation MainView
- (IBAction)searchGoogle {

NSString *urlString = [NSString stringWithFormat:"http://www.%@.com/", userTextField.text];

}

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
[textField resignFirstResponder];
return YES;
}

@end


What to do?

This is the only code that I have in my project

[dejo]

What to do?
Two things.
1) You need to prefix your string with the @ character for Objective-C to treat it as a constant NSString object.
NSString *urlString = [NSString stringWithFormat:@"http://www.%@.com/", userTextField.text];
2) Use [ code ] tags rather than quotes.

[guyddor]

warning: unused variable 'urlString'

What should I do?

[dejo]

What should I do?
Step away from the real coding, go (re)learn the basics of Objective-C and iPhone dev before you continue. Also, it helps to post specific questions rather than generic ones like "What should I do?" Hope that helps.