How to customise UISlider height - ios

Question

I have project in which have to customise UISlider element.
I wondering if someone knows how to change, or is it possible to change height of UISlide bar line.
I tried something like this but don't work:
let customBounds = CGRect(origin: bounds.origin,
size: CGSize(width: bounds.size.width, height: 15.0))
feedbackSlider.trackRectForBounds(customBounds)
Thanks

Answer 1

i hope that you want edit it in storyboard, and only the line size, use it in your custom UISlider
class CustomSlide: UISlider {
#IBInspectable var trackHeight: CGFloat = 2
override func trackRectForBounds(bounds: CGRect) -> CGRect {
//set your bounds here
return CGRect(origin: bounds.origin, size: CGSizeMake(bounds.width, trackHeight))
}
}

Answer 2

Overriding trackRect is a way to go, however if you're using additional UISlider's views like minimumValueImage, maximumValueImage you would also need to take their bound into account, otherwise they will overlap with slider’s track. As a shortcut you can simply use super's func:
Fixed version.
Swift 3+
#IBDesignable
class CustomSlider: UISlider {
/// custom slider track height
#IBInspectable var trackHeight: CGFloat = 3
override func trackRect(forBounds bounds: CGRect) -> CGRect {
// Use properly calculated rect
var newRect = super.trackRect(forBounds: bounds)
newRect.size.height = trackHeight
return newRect
}
}

Answer 3

You can override a method in you custom slider
For Objective-C
- (CGRect)trackRectForBounds:(CGRect)bounds {
CGRect rect = CGRectMake(0, 0, 100, 30);//change it to any size you want
return rect;
}
For Swift
override func trackRectForBounds(bounds: CGRect) -> CGRect {
var rect:CGRect = CGRectMake(0, 0, 100, 30)
return rect
}

Answer 4

Swift 3
class MySlide: UISlider {
#IBInspectable var height: CGFloat = 2
override func trackRect(forBounds bounds: CGRect) -> CGRect {
return CGRect(origin: bounds.origin, size: CGSize(width: bounds.width, height: height))
}
}

Answer 5

Swift 4 version without thumbImage.
class CustomSlider: UISlider {
#IBInspectable var trackHeight: CGFloat = 2
override func trackRect(forBounds bounds: CGRect) -> CGRect {
return CGRect(origin: bounds.origin, size: CGSize(width: bounds.width, height: trackHeight))
}
}

Answer 6

I think the answers above have a flaw: the origin of the track rect must be offset to account for the change in height of the track, otherwise it will show up off-center. Here is the way I did it:
class CustomSlider: UISlider {
#IBInspectable var sliderTrackHeight : CGFloat = 2
override func trackRect(forBounds bounds: CGRect) -> CGRect {
let originalRect = super.trackRect(forBounds: bounds)
return CGRect(origin: CGPoint(x: originalRect.origin.x, y: originalRect.origin.y + (sliderTrackHeight / 2)), size: CGSize(width: bounds.width, height: sliderTrackHeight))
}
}

Answer 7

U can easily get it done by subclassing UISlider. see following code
class CustomUISlider : UISlider
{
override func trackRectForBounds(bounds: CGRect) -> CGRect {
//set your bounds here
return bounds
}
}

Answer 8

You should be able to subclass the UISlider and then implement:
- (CGRect)trackRectForBounds:(CGRect)bounds
Just return the new CGRect here.

Answer 9

If you're using autolayout you can set a height constraint on the UISlider in the storyboard. if you need to change it at runtime - create an IBOutlet for the constraint and modify its .constant value.