In my project, i am using scaling for UI components. I am able to scale the text for UIlabel like below and it's working in all device:
1. Autoshrinks - minimum font scale set it to 0.5
2. No of lines - 0
3. Enable dynamic type in attribute inspector
4. adjustFontSizeToWidth to true
But when i am trying to adjust font for UI Button using beolow steps and i am not able to scale the text for UI button.
button.titleLabel?.numberOfLines = 1 // Tried with 0 also
button.titleLabel?.adjustsFontSizeToFitWidth = true
button.titleLabel?.lineBreakMode = // tried differenet linebreakmode
Could anyone have an idea of scaling UI Button text?
Are you sure it's not working?
Edit - After comments...
UIKit elements such as UILabel / UIButton / etc to not have a built-in "auto-adjust font height" property.
I don't work for Apple, so just guessing that is (at least in part) due to the fact that, in general...
Based on screen height, the UI is designed to either:
provide more or less information, e.g. more rows in a table, or
adjust vertical spacing between elements
That doesn't mean you can't or shouldn't adjust your font sizes... it just means you have to do it manually.
Couple options:
set the font-size at run-time, as suggested by Duncan
use a UIAppearance proxy to set the font-size, again at run-time
in either case, you could use a height-to-fontSize table or a "percentage" calculation.
Another option would be a custom class that sets the font-size based on the constrained button height.
Here's a simple example (note: for demonstration purposes only):
class AutoFontSizeButton: UIButton {
override func layoutSubviews() {
super.layoutSubviews()
guard let fnt = titleLabel?.font else { return }
// default system type button has 6-pts top / bottom inset
// and font size is 15/18ths of that height
let h = ((bounds.height - 12.0) * (15.0 / 18.0)).rounded()
let fs = fnt.pointSize
if h != fs {
titleLabel?.font = UIFont(descriptor: fnt.fontDescriptor, size: h)
}
}
}
Result - the top three (yellow) buttons are 30, 40 and 50-points in height, with the default font-size of 15. The bottom three (green) buttons are again 30, 40 and 50-points in height, but the font-size is automatically set at run-time:
I don't think there is a way to get the font to auto-size. However, if you set the button's titleLabel.font to a specific font size the button will update to use the new font size, including resizing the button.
Use code like this:
let size: CGFloat = useLargeFont ? 50.0 : 17.0 //Change as needed
if let buttonFont = button.titleLabel?.font {
button.titleLabel?.font = buttonFont.withSize(size)
}
In a very simple single screen app, I have a single-line UILabel going from left edge to right edge of the screen.
The text of the label is dynamically updated at runtime. The length of the text varies, as it contains a number in the range 0...100, and I am neither using a monospaced font nor leading zeroes.
Here is an illustration:
|<--------- Screen width --------------->|
|<----- UILabel "Some value = 0" ------->|
|<----- UILabel "Some value = 50" ------>|
|<----- UILabel "Some value = 100" ----->|
I would like the label to always use the maximum width for any device (i.e. screen size). This can be achieved by using auto-layout, suitable leading and trailing constraints, a large font size and the "auto-shrink" property for the label.
The problem is, that this approach will make the font size also vary depending on the value displayed, which is not what I want. It should only vary with the width of the screen, but not with the length of the label text.
In the example above, a large font size would be used for the value 0, a medium one for 50 and a small one for 100. I want it to adjust to the worst-case (100) and use the resulting size for any text afterwards.
Is it possible to achieve this using Interface-Builder properties and auto-layout constraints only?
I can think of ways how to calculate sizes in code, but I think there must be an easier way.
You cannot express font size as a proportion of view width in interface builder but you can do it very easily in code:
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
let textSize = Constant.baseFontSize * bounds.size.width / Constant.baseViewWidth
label.font = .systemFont(ofSize: textSize)
}
I am new to iOS Development.I am having problem with font size with phone screen size.For example Font size in iPhone 8 Plus looks fine but that text size is bigger in iPhone SE.I tried check Dynamic Type to Automatically Adjusts Font.And try to play with Autoshrink in StoryBoard.And i also tried to Add Font Variation in storyBoard.But I didnt get any good solution.Hope you understand my problem.Thanks in advance
Try this
class func dynamicFontSizeForIphone(fontSize : CGFloat) -> CGFloat
{
var current_Size : CGFloat = 0.0
current_Size = (UIScreen.main.bounds.width/320) //320*568 is my base
let FinalSize : CGFloat = fontSize * current_Size
return FinalSize
}
hope this work
You can change font size by using constraints.
1.take a label give its basic two constraint to satisfy. give one more constraint of equal.width to parent view. keep width as wide as your label text is.(a bit more than label text).
In attribute inspector there is a property name 'auto shrink' set it to 'minimum font size'
thats it.
Note: This will work fine if your Label text is constant. For changeable text there will be other approaches.
How can I get the height of my custom control?
The idea is I will use it to dynamically set the height of some buttons inside the custom control. I've set the Placeholder height to 44 in the Xcode size inspector.
Working off Apple's Start Developing iOS Apps (Swift) tutorial, I am attempting to access frame.size.height and it gives a value of 1000 while the tutorial seems to suggest it should be 44.
class RatingControl: UIView {
...
override public var intrinsicContentSize: CGSize {
let buttonSize = Int(frame.size.height)
print(buttonSize) // prints 1000
let width = (buttonSize * starCount) + (spacing * (starCount - 1))
return CGSize(width: width, height: buttonSize)
}
...
You should never access frame inside intrinsicContentSize. intrinsicContentSize should return the size that perfectly fits the contents of the view, regardless of its current frame.
In your case, I think you can just use 44 for your buttonSize.
The placeholder intrinsic size is just that, placeholder, so that IB interpreter is has some value to work with and can layout the rest of the scene. But in your intrinsicContentSize getter, you implement the real size, which will be used in runtime by the AutoLayout engine. Since you return 1000 as the intrinsic content height, that's what you will see in runtime.
Is there a way to scale text so that it takes up close to the same screen real estate no matter what the device size is? I've found that the text on an iPad sized device is too small in relation to the screen size when compared to the iPhone. Below is an example of what I'm looking for. Notice the text percentage size is similar in relation to the device screen size.
Example
To set constraints on the label that you have, see this link: How do you make a background image scale to screen size in swift? . I know that you might not be using Swift (I'm using Objective-C), but the first answer shows how to do it in the storyboard. Do the same thing it says, but for the label. Then, see the image below to change the auto shrink options for the label from "Fixed Font Size" to "Minimum Font Scale" (see image below). Hope this helps!
1. Select your label and open attribute inspector for it
2. Click on + sign by Font, select width and height as "Regular", click Add Variation
3. Another Font field will appear, this will represent font for ipad/big screen/ illusion of big screen (scroll view)
4. Select your desired font for ipad
I had my own fix and it's not one click, but I found it well worth it.
Step 1:
Test some font sizes for different screen sizes, recording the font size and the most relevant other dimension.
Here's what I mean...
I'd start with a normal iPad Screen and select a font size that worked.
Since I knew the entire height of the screen would determine what makes a font size comfortable or not, I'd record the font size along with the entire screen height.
So the font size was 50 with a height of 1024.
Then, I switched to the iPhone SE
This was pretty atrocious, so I fixed the font size:
After recording that the font size worked at 25 with a height of 568.
Step 2:
Bust out the calculator app and find a constant that relates the font sizes to the heights (in my case), giving or taking a bit.
Here's what I mean:
I knew 50 works with 1024 and that 25 works with 568.
Dividing 50/1024 gives you .048828125.
Multiplying that by 568 equals 27.734375, which would be a little fat of a font size for the SE.
Repeating that process but using the SE's values to do the division produced .0440140845, and checking that with the iPad's height produces a font size of 45, just a bit small for the mighty iPad screen.
So I split the quotients down the middle, resulting in a number around 0.46.
Step 3:
Connect the labels and change their font sizes programmatically using this number.
First, drag the labels into an outlet collection. I named my connection 'headerLabels' since they're all at the top of the screen.
Then, you can kinda steal my code, but just don't make too much money with it ;)
// Outlet collection of labels
#IBOutlet var headerLabels: [UILabel]!
// Who needs a short variable name when we can have a
// painfully lengthy one to describe the number we calculated?
let relativeFontConstant:CGFloat = 0.046
override func viewDidLoad() {
super.viewDidLoad()
// Should be in the viewDidLoad so it can load the same time as
// the view does.
// apply a font size to all the labels.
for label in headerLabels {
// multiply the height we based it on of the entire view
// to the number we calculated
label.font = label.font.withSize(self.view.frame.height * relativeFontConstant)
}
}
If you've got any questions, comments, compliments, or insults let me know :)
I was having the same issue where I needed the text to be scaled proportionally along with the screen size increase.
Adaptive sizing is quite limited as you can only set the font sizing for size classes. Having the font sizes for two width options, compact and regular was not a solution for me.
I have written a small lib which handles automatic font scaling for UILabel and UITextView for different screen sizes.
You can set the scaling globally or for a specific instance of UILabel and UITextView.
Find it here: AMXFontAutoScale
I had decent behavior with the following code in my viewDidLoad function:
(Note that the screen bounds are in 'points' not 'pixels')
// Set the clock font size according to the height.
// Design was done on iPhone XR with height of 896 points and font size of 98.
if (UIScreen.main.bounds.height != 896). // Only need code if not on original design size.
{
let scaleFactor: Float = Float(UIScreen.main.bounds.height) / 896.0
let fontSize = CGFloat(98.0 * scaleFactor)
self.clock.font = self.clock.font.withSize(fontSize)
}
This was using the "Helvetica Neue" font which is a fixed width font. It wasn't completely scaled up completely for some reason on larger devices, so still a bit smaller than the target on iPads, but close enough.
different screen sizes acoording to
// iphone 5s,SE screen width 320
// iphone 6,6s,7,etc width 375
// iphone 7 plus, 8 plus, xs max,etc width 414
if (self.view.frame.width == 320) {
label.font = UIFont(name: label.font.fontName, size: 16)
} else if (self.view.frame.width == 375) {
label.font = UIFont(name: label.font.fontName, size: 21)
} else if (self.view.frame.width == 414) {
label.font = UIFont(name: label.font.fontName, size: 24)
}
There is an aspect ratio constraint available. Add this to your label. Constraints to left and top margins for anchoring the label in place should silence the compiler warnings.
As #VatsalManot mentioned, learn adaptive sizing for starters. Here's a good link:
http://www.raywenderlich.com/83276/beginning-adaptive-layout-tutorial
Hope this helps! :)
for those who want more than xCode editor has to offer this is my hack and its not future proof,
based on this post we can scale font programmatically
Warning!! SCALE FACTOR is not refined yet.
you will need to work on it.
usage:
titleView.font = UIFont.appFont(ofSize: 24, weight: .bold)
contentView.font = UIFont.appFont(ofSize: 16)
code:
extension UIFont {
class func appFont(
ofSize size : CGFloat = UIFont.systemFontSize,
weight : Weight = .regular,
autoScale : Bool = true
) -> UIFont {
return UIFont.systemFont(ofSize: autoScale ? size.dp : size, weight: weight)
}
}
extension CGFloat {
var dp: CGFloat {
let width = UIScreen.main.bounds.width
let device = UIScreen.main.traitCollection.userInterfaceIdiom
if (device == .phone) {
if (width <= 320) {
// iPod(Gen7)
// iPhone(5s, SEGen1)
return self * 0.75
} else if (width <= 375) {
// iPhone(SEGen2 6, 6s, 7, 8, X, Xs, 11pro, 12mini, 13mini)
return self * 0.95
} else if (width <= 414) {
// iPhone(6+, 6s+, 7+, 8+, XsMax, XR, 11, 11proMax, 12, 12pro, 13, 13pro)
return self
} else if (width <= 744) {
// iPhone(12proMax, 13proMax)
return self * 1.2
}
} else if (device == .pad) {
if (width <= 744) {
// ipad(miniGen6, )
return self * 1.4
} else if (width <= 768) {
// ipad(Gen5, Gen6, Air, Air2, Pro9.7)
return self * 1.45
} else if (width <= 810) {
// ipad(Gen9)
return self * 1.5
} else if (width <= 834) {
// ipad(AirGen3, AirGen5, Pro10.5, Pro11Gen1, Pro11Gen3)
return self * 1.55
} else if (width <= 1024) {
// ipad(Pro12.9Gen1, Pro12.9Gen2, Pro12.9Gen3, Pro12.9Gen5)
return self * 1.85
}
}
return self
}
}