Make Uislider Height Larger

Make UISlider height larger?

I found what I was looking for. The following method just needs to be edited in a subclass.

override func trackRect(forBounds bounds: CGRect) -> CGRect {
   var customBounds = super.trackRect(forBounds: bounds)
   customBounds.size.height = ...
   return customBounds
}

UISlider track not increasing in thickness

As mentioned in many other answers, you can change the height by creating a custom slider as below,

class CustomSlider: UISlider {

    override func trackRect(forBounds bounds: CGRect) -> CGRect {
        var rect = super.trackRect(forBounds: bounds)
        rect.size.height = 7
        return rect
    }
}

But in your particular case, you are not seeing the change because your implementation is not allowing the factionSlider to use overridden trackRect. To use that you need to change that to CustomSlider as below,

class FactionButton: UISlider {
    var factionSlider = CustomSlider() 

    func factionBalanceSlider(){
        factionSlider.frame = CGRect(x: 15, y: 542, width: 386, height: 57)
        factionSlider.minimumValueImage = #imageLiteral(resourceName: "Alliance Slider")
        factionSlider.maximumValueImage = #imageLiteral(resourceName: "Horde Slider")
        factionSlider.setThumbImage(#imageLiteral(resourceName: "Thumb Image"), for: .normal)
        factionSlider.minimumTrackTintColor = UIColor(red:0.08, green:0.33, blue:0.69, alpha:0.8)
        factionSlider.maximumTrackTintColor = UIColor(red:1.00, green:0.00, blue:0.00, alpha:0.59)

        factionSlider.setValue(0.5, animated: true)
        factionSlider.isContinuous = true
        factionSlider.addTarget(self, action: #selector(recordFactionBalance(sender:)) , for: .valueChanged)
    }

    func getSlider() -> UISlider {
        return factionSlider
    }
}

Note In Swift, class name should start with Capital as i updated above. Secondly, I think FactionButton should not be a subclass of UISlider.

UISlider custom images and thumb height?

It turns out setting my slider values in the views did load method was causing problems. I set them in Interface Builder and that was fixed. Once set in IB I can tweak them in code if needs be with no problems.

As for my other problem, I'm wondering if this is because I'm not testing on an actual device, so I'm going to pause that question until I get it on the device in a few weeks.

Custom UISlider - Increase hot spot size

I ended up subclassing the UISlider and overriding this method:

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent*)event {
    CGRect bounds = self.bounds;
    bounds = CGRectInset(bounds, -10, -15);
    return CGRectContainsPoint(bounds, point);
}

This extends the touchable area by 10 pixels on the left and right and 15 pixels on the top and bottom.

How to change the size of a UISlider thumb when seeking

Create a normal and larger thumb image with the sizes you want as PDF and add it to the .xcassets.

Then use the following lines of code:

let normal = UIImage(named: "thumbSmall")
slider.setThumbImage(normal, for: .normal)
let highlighted = UIImage(named: "thumbLarger")
slider.setThumbImage(highlighted, for: .highlighted)

Then during sliding the larger thumb image is shown.

A short test looks like this:

bigger UISlider ok but tracking zone problem

I believe that you may want to look at thumbRectForBounds:trackRect:value:

Customizing UISlider look

I believe you'll have to write your own slider to do that. There seems to be no (public) API to change UISlider's behavior regarding the stretchable region.

How to change specified image size in UIImageView with UISlider in Swift programmatically

Make the slider's value range from .01 to 1.0 (.01 should work better than 0.)

Control-drag from your slider into your view controller and create an action on the slider's valueChanged event. Let's call it sliderChanged.

In the slider's action method, change the scale on the image view:

@IBOutlet myImageView: UIImageView*

@IBAction func sliderChanged(sender: UISlider) {
  let scale = sender.value
  let transform = CGAffineTransform.scale(scaleX: scale, y: scale)
  myImageView.transform = transform
}

That should do it.

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