concatenate strings together in objective c [duplicate]

Question

how to i concatenate strings in objective c?

- (IBAction)emailButton:(id)sender { MFMailComposeViewController *mailContoller = [[MFMailComposeViewController alloc]init]; [mailContoller setMailComposeDelegate:self]; NSString *email = @"*******gmail.com"; NSString *email1 = @"*******@hotmail.co.uk"; NSArray *emailArray = [[NSArray alloc]initWithObjects:email, email1, nil]; NSString *message = [NSString stringWithFormat:@"%@\n%@\n%@", textField1.text, textField2.text, textField3.text]; [mailContoller setMessageBody:message isHTML:NO]; [mailContoller setToRecipients:emailArray]; [mailContoller setSubject:@"IT WORKS!"]; [self presentViewController:mailContoller animated:YES completion:nil]; } -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [[self myTextView] resignFirstResponder]; } -(void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error { [self dismissViewControllerAnimated:YES completion:nil]; } @end

any help on this will be greatly appreciated.

thank you

@DavidRönnqvist Yeah. Deleted it, though.

Stephen Darlington
– Stephen Darlington

2013-09-24 15:07:13 +00:00
Commented Sep 24, 2013 at 15:07 — Stephen Darlington
– Stephen Darlington, Commented Sep 24, 2013 at 15:07

ipmcc · Accepted Answer · 2013-09-24 14:49:00Z

In the simplest case:

NSString* concatenatedString = [stringA stringByAppendingString: stringB];

From your code, this:

NSString *message = [NSString stringWithFormat:@"%@\n%@\n%@", textField1.text, textField2.text, textField3.text];

might be better expressed as:

NSString *message = [@[textField1.text, textField2.text, textField3.text] componentsJoinedByString: @"\n"];

+stringWithFormat: is comparatively expensive when there's nothing but simple concatenation going on.

i just keep getting a message saying undeclared variable when i input this code.
Naturally, you need to replace stringA and stringB with your string variables.

Collectives™ on Stack Overflow

concatenate strings together in objective c [duplicate]

1 Answer 1

2 Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Linked

Related