Related
I've been searching for a way to make the UISlider progress bar taller, like increasing the height of the slider but couldn't find anything. I don't want to use a custom image or anything, just make it taller, so the UISlider doesn't look so thin. Is there an easy way to do this that I'm missing?
The accepted answer will undesirably change the slider's width in some cases, like if you're using a minimumValueImage and maximumValueImage. If you only want to change the height and leave everything else alone, then use this code:
override func trackRect(forBounds bounds: CGRect) -> CGRect {
var newBounds = super.trackRect(forBounds: bounds)
newBounds.size.height = 12
return newBounds
}
Here's my recent swifty implementation, building on CularBytes's ...
open class CustomSlider : UISlider {
#IBInspectable open var trackWidth:CGFloat = 2 {
didSet {setNeedsDisplay()}
}
override open func trackRect(forBounds bounds: CGRect) -> CGRect {
let defaultBounds = super.trackRect(forBounds: bounds)
return CGRect(
x: defaultBounds.origin.x,
y: defaultBounds.origin.y + defaultBounds.size.height/2 - trackWidth/2,
width: defaultBounds.size.width,
height: trackWidth
)
}
}
Use this on a UISlider in a storyboard by setting its custom class
The IBInspectable allows you to set the height from the storyboard
For those that would like to see some working code for changing the track size.
class CustomUISlider : UISlider {
override func trackRect(forBounds bounds: CGRect) -> CGRect {
//keeps original origin and width, changes height, you get the idea
let customBounds = CGRect(origin: bounds.origin, size: CGSize(width: bounds.size.width, height: 5.0))
super.trackRect(forBounds: customBounds)
return customBounds
}
//while we are here, why not change the image here as well? (bonus material)
override func awakeFromNib() {
self.setThumbImage(UIImage(named: "customThumb"), for: .normal)
super.awakeFromNib()
}
}
Only thing left is changing the class inside the storyboard:
You can keep using your seekbar action and outlet to the object type UISlider, unless you want to add some more custom stuff to your slider.
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
}
You could play with this, see what happens:
slider.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1.0, 2.0);
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
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))
}
}
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
}
}
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
}
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))
}
}
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))
}
}
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))
}
}
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
}
}
You should be able to subclass the UISlider and then implement:
- (CGRect)trackRectForBounds:(CGRect)bounds
Just return the new CGRect here.
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.
I have trouble with modifying my UIView height at launch.
I have to UIView and I want one to be screen size * 70 and the other to fill the gap.
here is what I have
#IBOutlet weak var questionFrame: UIView!
#IBOutlet weak var answerFrame: UIView!
let screenSize:CGRect = UIScreen.mainScreen().bounds
and
questionFrame.frame.size.height = screenSize.height * 0.70
answerFrame.frame.size.height = screenSize.height * 0.30
It has no effect on the app during run time.
I use autolayout but I only have margins constraints...
Am I doing it all wrong?
This can be achieved in various methods in Swift 3.0 Worked on Latest version MAY- 2019
Directly assign the Height & Width values for a view:
userView.frame.size.height = 0
userView.frame.size.width = 10
Assign the CGRect for the Frame
userView.frame = CGRect(x:0, y: 0, width:0, height:0)
Method Details:
CGRect(x: point of X, y: point of Y, width: Width of View, height:
Height of View)
Using an Extension method for CGRECT
Add following extension code in any swift file,
extension CGRect {
init(_ x:CGFloat, _ y:CGFloat, _ w:CGFloat, _ h:CGFloat) {
self.init(x:x, y:y, width:w, height:h)
}
}
Use the following code anywhere in your application for the view to set the size parameters
userView.frame = CGRect(1, 1, 20, 45)
Here you go. this should work.
questionFrame.frame = CGRectMake(0 , 0, self.view.frame.width, self.view.frame.height * 0.7)
answerFrame.frame = CGRectMake(0 , self.view.frame.height * 0.7, self.view.frame.width, self.view.frame.height * 0.3)
Swift 3 and Swift 4:
myView.frame = CGRect(x: 0, y: 0, width: 0, height: 0)
Hi create this extends if you want. Update 2021 Swift 5
Create File Extends.Swift and add this code (add import foundation where you want change height)
extension UIView {
var x: CGFloat {
get {
self.frame.origin.x
}
set {
self.frame.origin.x = newValue
}
}
var y: CGFloat {
get {
self.frame.origin.y
}
set {
self.frame.origin.y = newValue
}
}
var height: CGFloat {
get {
self.frame.size.height
}
set {
self.frame.size.height = newValue
}
}
var width: CGFloat {
get {
self.frame.size.width
}
set {
self.frame.size.width = newValue
}
}
}
For Use (inherits Of UIView)
inheritsOfUIView.height = 100
button.height = 100
print(view.height)
For a progress bar kind of thing, in Swift 4
I follow these steps:
I create a UIView outlet : #IBOutlet var progressBar: UIView!
Then a property to increase its width value after a user action var progressBarWidth: Int = your value
Then for the increase/decrease of the progress progressBar.frame.size.width = CGFloat(progressBarWidth)
And finally in the IBACtion method I add progressBarWidth += your value for auto increase the width every time user touches a button.
You can do this in Interface Builder:
1) Control-drag from a frame view (e.g. questionFrame) to main View, in the pop-up select "Equal heights".
2)Then go to size inspector of the frame, click edit "Equal height to Superview" constraint, set the multiplier to 0.7 and hit return.
You'll see that constraint has changed from "Equal height to..." to "Proportional height to...".
Assigning questionFrame.frame.size.height= screenSize.height * 0.30 will not reflect anything in the view. because it is a get-only property. If you want to change the frame of questionFrame you can use the below code.
questionFrame.frame = CGRect(x: 0, y: 0, width: 0, height: screenSize.height * 0.70)
I know that there is already a solution to this question, but I found an alternative to this issue and maybe it could help someone.
I was having trouble with setting the frame of my sub view because certain values were referring to its position within the main view. So if you don't want to update your frame by changing the whole frame via CGRect, you can simply change a value of the frame and then update it.
// keep reference to you frames
var questionView = questionFrame.frame
var answerView = answerFrame.frame
// update the values of the copy
questionView.size.height = CGFloat(screenSize.height * 0.70)
answerView.size.height = CGFloat(screenSize.height * 0.30)
// set the frames to the new frames
questionFrame.frame = questionView
answerFrame.frame = answerView
I am trying to change the default height and width of a UISwitch element in iOS, but unsuccessfully.
Can you change the default height and width of a UISwitch element?
Should the element be created programmatically?
I tested the theory and it appears that you can use a scale transform to increase the size of the UISwitch
UISwitch *aSwitch = [[UISwitch alloc] initWithFrame:CGRectMake(120, 120, 51, 31)];
aSwitch.transform = CGAffineTransformMakeScale(2.0, 2.0);
[self.view addSubview:aSwitch];
Swift 4
#IBOutlet weak var switchDemo: UISwitch!
override func viewDidLoad() {
super.viewDidLoad()
switchDemo.transform = CGAffineTransform(scaleX: 0.75, y: 0.75)
}
Swift 5:
import UIKit
extension UISwitch {
func set(width: CGFloat, height: CGFloat) {
let standardHeight: CGFloat = 31
let standardWidth: CGFloat = 51
let heightRatio = height / standardHeight
let widthRatio = width / standardWidth
transform = CGAffineTransform(scaleX: widthRatio, y: heightRatio)
}
}
Not possible. A UISwitch has a locked intrinsic height of 51 x 31 .
You can force constraints on the switch at design time in the xib...
but come runtime it will snap back to its intrinsic size.
You can supply another image via the .onImage / .offImage properties but again from the docs.
The size of this image must be less than or equal to 77 points wide
and 27 points tall. If you specify larger images, the edges may be
clipped.
You are going to have to bake your own custom one if you want another size.
here is a nice UISwitch subclass that i wrote for this purpose, its also IBDesignable so you can control it from your Storyboard / xib
#IBDesignable class BigSwitch: UISwitch {
#IBInspectable var scale : CGFloat = 1{
didSet{
setup()
}
}
//from storyboard
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
setup()
}
//from code
override init(frame: CGRect) {
super.init(frame: frame)
setup()
}
private func setup(){
self.transform = CGAffineTransform(scaleX: scale, y: scale)
}
override func prepareForInterfaceBuilder() {
setup()
super.prepareForInterfaceBuilder()
}
}
import UIKit
extension UISwitch {
static let standardHeight: CGFloat = 31
static let standardWidth: CGFloat = 51
#IBInspectable var width: CGFloat {
set {
set(width: newValue, height: height)
}
get {
frame.width
}
}
#IBInspectable var height: CGFloat {
set {
set(width: width, height: newValue)
}
get {
frame.height
}
}
func set(width: CGFloat, height: CGFloat) {
let heightRatio = height / UISwitch.standardHeight
let widthRatio = width / UISwitch.standardWidth
transform = CGAffineTransform(scaleX: widthRatio, y: heightRatio)
}
}
Even if it’s possible to make a UISwitch smaller, this would negatively effect the user experience. Apple's Human Interface Guidelines recommend a minimum size of 44 points for touch targets.
Provide ample touch targets for interactive elements. Try to maintain a minimum tappable area of 44pt x 44pt for all controls
By scaling this to smaller than the standard size, it will become more difficult for users to tap, and also introduce accessibility concerns. Please consider users with less than perfect vision or motor control before making UI elements small.
Finally, here’s an excerpt from a great article about touch target sizes illustrating what can happen when controls are too small.
Interviewer — “I noticed, you had some trouble submitting your email address on this screen, can you tell me how that felt?”
User — “Oh yeah, I’m not very good at technology.”
Interviewer — “What do you think was causing you to struggle at that point?”
User — “The buttons were hard to tap, and I just kept stuffing it up.”
I've been searching for a way to make the UISlider progress bar taller, like increasing the height of the slider but couldn't find anything. I don't want to use a custom image or anything, just make it taller, so the UISlider doesn't look so thin. Is there an easy way to do this that I'm missing?
The accepted answer will undesirably change the slider's width in some cases, like if you're using a minimumValueImage and maximumValueImage. If you only want to change the height and leave everything else alone, then use this code:
override func trackRect(forBounds bounds: CGRect) -> CGRect {
var newBounds = super.trackRect(forBounds: bounds)
newBounds.size.height = 12
return newBounds
}
Here's my recent swifty implementation, building on CularBytes's ...
open class CustomSlider : UISlider {
#IBInspectable open var trackWidth:CGFloat = 2 {
didSet {setNeedsDisplay()}
}
override open func trackRect(forBounds bounds: CGRect) -> CGRect {
let defaultBounds = super.trackRect(forBounds: bounds)
return CGRect(
x: defaultBounds.origin.x,
y: defaultBounds.origin.y + defaultBounds.size.height/2 - trackWidth/2,
width: defaultBounds.size.width,
height: trackWidth
)
}
}
Use this on a UISlider in a storyboard by setting its custom class
The IBInspectable allows you to set the height from the storyboard
For those that would like to see some working code for changing the track size.
class CustomUISlider : UISlider {
override func trackRect(forBounds bounds: CGRect) -> CGRect {
//keeps original origin and width, changes height, you get the idea
let customBounds = CGRect(origin: bounds.origin, size: CGSize(width: bounds.size.width, height: 5.0))
super.trackRect(forBounds: customBounds)
return customBounds
}
//while we are here, why not change the image here as well? (bonus material)
override func awakeFromNib() {
self.setThumbImage(UIImage(named: "customThumb"), for: .normal)
super.awakeFromNib()
}
}
Only thing left is changing the class inside the storyboard:
You can keep using your seekbar action and outlet to the object type UISlider, unless you want to add some more custom stuff to your slider.
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
}
You could play with this, see what happens:
slider.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1.0, 2.0);