Question

…ViewController.h:

@property (nonatomic, strong) IBOutlet UISlider *slider;

…ViewController.m:

@synthesize slider;

- (void)viewDidLoad
{
    [super viewDidLoad];

    ...
    currentValue = 50;
    self.slider.value = currentValue;

    // Do any additional setup after loading the view, typically from a nib.
}

.xib:

The UISlider in my interface is connected to the slider property.

Behavior:

The slider sits all the way to the right at value 100 when it is supposed to be in the middle. An action I set up confirms the value of currentValue is 50. If currentValue is 50 and slider.value is set to 50, why doesn’t the position reflect this?

P.S. I tried [slider setNeedsDisplay] and it did not affect this behavior.

Update: thanks for the quick answers! What a silly thing to do. I print out currentValue as an int elsewhere so I am now setting slider.value with this code:

self.slider.value = (float) currentValue/100;

Answer 1

currentValue = 50;

The slider’s range is not 0…100 but 0…1. You have to write either

currentValue = 0.5;

or change the range of the slider:

self.slider.maximumValue = 100;