Sliders... HELP PLEASE!

[nathanl1192]

Hi there,

I am reasonably new to development so please keep things as simple as possible.

I was wondering how to make a slider, which affects the function of a UIButton, if that makes sense.

So, If the slider is a value 0, then when the button is pressed a alert will show; but when the slider is a value 0.1, a sound will play.

Thanks so much,

Nathan

Running XCode 4.0

[architectpianist]

Add a method in your controller.

-(IBAction)mySliderValueChanged:(id)sender;

Add an instance variable to store the slider value.
Add a slider to IB, connect it to mySliderValueChanged. You'll want to drag from the right side Connections inspector, rightmost pane, from the Value Changed event.
In mySliderValueChanged, put something like:

UISlider *slider = (UISlider *)sender;
slidersValue = slider.value;

Then, in your button press method:

if (slidersValue == 0)
      //Show alert
else
      //Play sound

[nathanl1192]

Thanks so much!
BUT!
Where do I declare slidersValue?
How do I create an instance variable to store it?
Thanks

[architectpianist]

Header file.

[nathanl1192]

Originally Posted by architectpianist

Header file.

And How do I create an instance variable to store it?

Thanks again!

[dany_dev]

I think that is not usefull ask in a forum if you are not able to create a variable.....why not starting from a book like that
Beginning iPhone 4 Development: Exploring the iOS SDK: David Mark, Jack Nutting, Jeff LaMarche

[nathanl1192]

Originally Posted by dany_dev

I think that is not usefull ask in a forum if you are not able to create a variable.....why not starting from a book like that
Beginning iPhone 4 Development: Exploring the iOS SDK: David Mark, Jack Nutting, Jeff LaMarche

I disagree. I am a full time student who has decided to have a play around with xcode. I do not have the time to study fully. Asking in the forum gives me quick results from usually helpful people.

[dany_dev]

Originally Posted by nathanl1192

I disagree. I am a full time student who has decided to have a play around with xcode. I do not have the time to study fully. Asking in the forum gives me quick results from usually helpful people.

lol.........are you joking right?

[nathanl1192]

Originally Posted by dany_dev

lol.........are you joking right?

What would I be joking about? I know learning code needs time which I don't have but I still want to give it a try.

Note: And I mean study xcode fully

[kazbluesky]

I think he's serious, but he just misunderstands the system.

The forum (as I see it) wants you to have a go at doing it yourself and then when you get absolutely stuck you then ask if anyone can help you solving the problem that's beyond you. Basically, they want to help you because they struggled, but they expected you to struggle too - they don't just want to be unpaid teachers or code writers for you. Seems reasonable........

You will need to look at the books sooner or later though, or the YouTube vids, good luck.

[nathanl1192]

Originally Posted by kazbluesky

I think he's serious, but he just misunderstands the system.

The forum (as I see it) wants you to have a go at doing it yourself and then when you get absolutely stuck you then ask if anyone can help you solving the problem that's beyond you. Basically, they want to help you because they struggled, but they expected you to struggle too - they don't just want to be unpaid teachers or code writers for you. Seems reasonable........

You will need to look at the books sooner or later though, or the YouTube vids, good luck.

I have spent a long time trying to do this myself, I have done web searches etc and watched countless tutorials. I am stuck. Is anyone going to help me?

[iisword]

Please tell me your not a college or high school student...

[iAppDev]

this is what you do

		
		if ((myslider.value >= 0.0) && (myslider.value <= 1.0)) {
		   //your code to do methods goes here 
		}

if you don't understand this, then you seriously need to read a book or something or find online tutorials that will do pieces of this.

[Epic Sandwich]

Seriously, follow this advice:

Originally Posted by dany_dev

I think that is not usefull ask in a forum if you are not able to create a variable.....why not starting from a book like that
Beginning iPhone 4 Development: Exploring the iOS SDK: David Mark, Jack Nutting, Jeff LaMarche

It's an excellent book, and I promise you that even after reading it for just one hour you'll be able to do what you're asking here with ease, and understand exactly what's going on at the same time.