iPhone Programming - UISlider Basics

A quick tutorial teaching you how to use a UISlider and get it's value to use for a purpose.

Main Code:
In the .h
IBOutlet UISlider *slider; IBOutlet UILabel *label; IBOutlet UILabel *counter;
}

- (IBAction)changeLabel;

In the .m
- (IBAction)changeLabel { counter.text = [[NSString alloc] initWithFormat:@"%.1f" ,slider.value]; if (slider.value (type SHIFT . here as YouTube won't let me post it as a character - the greater than sign)= 0.5) { label.text = @"Danger!"; label.textColor = [UIColor redColor]; } else { label.text = @""; label.textColor = [UIColor clearColor]; }
}

FlambeEmbers Channel: http://www.youtube.com/flambeember

Link: http://developer.apple.com/devcenter/ios/index.action
Website: http://failcake.webs.com/
Twitter: http://twitter.com/failcakeapps
Channel: http://youtube.com/milmersxcode

Category:

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[mrjazzycharon2]

Instead of this awkward if-else code, you could just write

label.hidden = slider.value-0.5;

And specify the red color and the text in the nib-file. And what's the point of the space before the comma in the stringWithFormat: call? You are emphasizing it, but beside that it's irrelevant it's even bad punctuation.

[MilmersXcode]

@mrjazzycharon2 The reason for the if-else code is to get people used to using them as this is a "Basics" tutorial. Of course it would be more basic to just do what you suggested but then people won't learn how to and become more fluent in using if-else statements.

As for the "," when initializing the string it's because:

1. I'm emphasizing it for the video's purpose.

2. I believe it looks neater and more pleasing to the eye.

I have my reasons for things :D.

Milmer.

[mrjazzycharon2]

Sorry, there shouldn't be a minus- but a smaller-character before 0.5.

[MilmersXcode]

@maxhasadhd Yea sorry it's just you put "Nameofslider.volume" in your last comment and I got a bit confused.

[MilmersXcode]

@maxhasadhd I don't really understand. How can a slider have a .volume? Anyway your video is now up and its called "Changing sites with UISegmentedControl" and it's in the UIWebView playlist. Hope you like :D

I will get back to you tomorrow(10th April) on the UISlider stuff as it's late here.

[MilmersXcode]

@maxhasadhd Hey. Your Video is currently uploading and should be up by tonight but it keeps failing near the end of the upload :(. About the saving a UISlider I will get back to you.