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iOS

Posted by Tom Coomer
Tom Coomer
1,331 Points

Adding the value of a text field to a label with a string.

I would like to add the value in a text field to a label that already has a string inside it. For example if the

label = Hello textlabel = treehouse

once the enter button is clicked label = Hello treehouse

Thanks

1 Answer

Michael Jones
.a{fill-rule:evenodd;}techdegree seal-36
Michael Jones
Python Development Techdegree Graduate 38,554 Points

Hey Tom,

I've given it a go and this is what I have so far.

  • (IBAction)myButton:(id)sender { NSString *textFieldString = _myTextField.text;

    self.myLabel.text = [_myLabel.text stringByAppendingString:textFieldString]; }

This button method will create a new NSString called 'textFieldString' from the TextField.

It will then add the text to the Label created.

Hope this helps in some way.

Tom Coomer
Tom Coomer
1,331 Points

Okay. Ill try it now. Thanks.

Tom Coomer
Tom Coomer
1,331 Points

It worked! Thanks!

Michael Jones
.a{fill-rule:evenodd;}techdegree seal-36
Michael Jones
Python Development Techdegree Graduate 38,554 Points

You're welcome buddy. Keep up the good work!!

Tom Coomer
Tom Coomer
1,331 Points

Sorry to bother you again. Do you know how to keep a button in its selected state after it has been pressed? As if it is a light switch button of some kind in the real world.

Michael Jones
.a{fill-rule:evenodd;}techdegree seal-36
Michael Jones
Python Development Techdegree Graduate 38,554 Points

I'm not too sure to be honest, have you thought about using a UISwitch instead of a UIButton?

Tom Coomer
Tom Coomer
1,331 Points

Okay. I'll look at that instead. Thanks again.

Michael Jones
.a{fill-rule:evenodd;}techdegree seal-36
Michael Jones
Python Development Techdegree Graduate 38,554 Points

No worries, I'll carry on working on it though. Determined to find a way.

Derek Medlin
Derek Medlin
6,151 Points

In your header file add:

  • (IBAction)SelectButton:(UIButton *)sender;

In your implementation file add:

  • (IBAction)SelectButton:(UIButton *)sender { if (sender.selected){ sender.selected = NO; NSLog(@"Button is not selected"); } else{ sender.selected = YES; NSLog(@"Button IS selected"); } }

Then connect the button with "TouchUpInside". Don't forget to set the selected image/color, etc to whatever you want in the Attributes Inspector. Hope this helps.

Tom Coomer
Tom Coomer
1,331 Points

Thanks a lot!

Tom Coomer
Tom Coomer
1,331 Points

How do I set the image for the selected state?

Derek Medlin
Derek Medlin
6,151 Points
  • (IBAction)SelectButton:(UIButton *)sender { if (sender.selected){ // deselect button since its selected sender.selected = NO; // set background image to the off image (background image over image if you want to see the button title / text) [sender setBackgroundImage:[UIImage imageNamed:@"OffImage.png"] forState:UIControlStateNormal]; // set the button title [sender setTitle:@"OFF" forState:UIControlStateNormal]; NSLog(@"Button is not selected"); } else{ sender.selected = YES; [sender setBackgroundImage:[UIImage imageNamed:@"OnImage.png"] forState:UIControlStateSelected]; [sender setTitle:@"ON" forState:UIControlStateNormal]; NSLog(@"Button IS selected"); } }

Or you could just set these in the Attributes Inspector in Xcode. Go to "State Config" on the Attributes Inspector tab. Make sure "Default" is selected. Then go to either image or background image and change it for your "off image" and change the title or whatever else you would like to change. Then go to "State Config" again and change the drop down to "Selected" and then make any changes you want to for that state ( image/title etc). Either way you choose to do this is fine just make sure button type is "Custom".

Derek Medlin
Derek Medlin
6,151 Points

Sorry, I don't know markdown, maybe this time it will be more readable on the code....

- (IBAction)SelectButton:(UIButton *)sender {
    if (sender.selected){ 
        // deselect button since its selected
        sender.selected = NO;
        // set background image to the off image (background image over image if you want to see the button title / text)
        [sender setBackgroundImage:[UIImage imageNamed:@"OffImage.png"] forState:UIControlStateNormal];
        // set the button title
        [sender setTitle:@"OFF" forState:UIControlStateNormal];
        NSLog(@"Button is not selected");
    }
    else{
        sender.selected = YES;
        [sender setBackgroundImage:[UIImage imageNamed:@"OnImage.png"] forState:UIControlStateSelected];
        [sender setTitle:@"ON" forState:UIControlStateNormal];
        NSLog(@"Button IS selected");
        }
    }
Tom Coomer
Tom Coomer
1,331 Points

Brilliant! Thanks!