How to resize an image inside an UIButton programmatically? - ios

I have this UIButton and an image to fit in.
I don't want that the image take all the space inside the button but just a little part of it right in the center, but if I resize the button it will resize the image too.
How can I do that, is there an option to set whatever dimension I want independently from the size of the UIButton?
Thanks!

This can be done through code in the following way:
let imageSize:CGSize = CGSize(width: 20, height: 20)
let button:UIButton = UIButton(type: UIButton.ButtonType.custom)
button.frame = CGRect(x: 200, y: 200, width: 60, height: 60)
button.backgroundColor = UIColor.yellow
button.setImage(UIImage(named: "chat.png"), for: UIControl.State.normal)
// The below line will give you what you want
button.imageEdgeInsets = UIEdgeInsets(
top: (button.frame.size.height - imageSize.height) / 2,
left: (button.frame.size.width - imageSize.width) / 2,
bottom: (button.frame.size.height - imageSize.height) / 2,
right: (button.frame.size.width - imageSize.width) / 2)
self.view.addSubview(button)
This way, you can achieve what you wanted.

I couldn't get the button's imageView to resize until I used contentHorizontalAlignment and contentVerticalAlignment both set to .fill. Then using imageEdgeInsets I repositioned the image.
let button = UIButton()
let image = UIImage(systemName: "bag.badge.plus")
button.setImage(image, for: .normal)
button.contentHorizontalAlignment = .fill
button.contentVerticalAlignment = .fill
button.imageEdgeInsets = UIEdgeInsets(top: 6, left: 6, bottom: 10, right: 10)
Result:

You can experiment with image view insets. Every UIButton has a property imageView.
In Swift 3 you can do this like so:
//let button = UIButton()
button.imageView?.backgroundColor = UIColor.red
button.imageEdgeInsets = UIEdgeInsetsMake(10, 10, 10, 10)
red background is just so you know what is changing

I would do it this way:
A UIButton is just a UIView. You can simply add a UIImageView with a set image and call addSubview on the UIButton.

Taking into account what KVISH said before i have implemented this and it worked as expected. I posted this because Houman asked for an example.
//grab the image using the name of the pic
var image = UIImage(named: "picture")
//set the size for the image
image = image?.resize(toWidth: 18)
image = image?.resize(toHeight: 18)
//set the image to the button
buttonName.setImage(image, for: UIControlState.normal)
//adjust the position
buttonName.imageEdgeInsets = UIEdgeInsetsMake(8,16,9,0)

As of iOS 13, when using SF Symbols, I prefer this:
let button = UIButton()
let font = UIFont.systemFont(ofSize: 30) // <- make it larger, smaller, whatever you want.
let config = UIImage.SymbolConfiguration(font: font)
let image = UIImage(systemName: "bag.badge.plus", withConfiguration: config)
button.setImage(image, for: .normal)

These can be achieved by adding imageEdgeInsets to a UIButton.
In swift4.2
button.imageEdgeInsets = UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10)

Related

Change a SF Symbol size inside a UIButton

I am declaring a Button like this :
let menuButton = UIButton()
After that I am trying to change it's parameter and set his position on the view with the help of LBTATools (a pod) with this function:
fileprivate func setMenuButtonUI() {
menuButton.setImage(UIImage(systemName: "line.horizontal.3.decrease.circle.fill"), for: .normal)
view.addSubview(menuButton)
menuButton.anchor(top: view.safeAreaLayoutGuide.topAnchor, leading: view.leadingAnchor, bottom: nil, trailing: nil, padding: .init(top: 20, left: 60, bottom: 0, right: 0), size: .init(width: 40, height: 40))
menuButton.setupShadow(opacity: 1, radius: 5, offset: .zero, color: .darkGray)
menuButton.tintColor = .red
}
Everything is working well, I get the right color, position and even size.
Only problem is it's size, I cannot change it with all the usual methods like menuButton.imageView?.contentMode = .scaleAspectFit etc..
Probably it comes from the fact that it is a SF Symbol and not a normal image.
The help of someone would be really appreciated.
Thanks
You can do it using SymbolConfiguration like in the sample code below:
let largeConfig = UIImage.SymbolConfiguration(pointSize: 140, weight: .bold, scale: .large)
let largeBoldDoc = UIImage(systemName: "doc.circle.fill", withConfiguration: largeConfig)
button.setImage(largeBoldDoc, for: .normal)
The iOS 15 and Swift 5 solution would be:
var config = UIButton.Configuration.plain() // Change style with e.g. `.filled()`
config.title = "Title of the UIButton"
config.image = UIImage(systemName: "line.horizontal.3.decrease.circle.fill",
withConfiguration: UIImage.SymbolConfiguration(scale: .small)) // Change the scale here
config.imagePadding = 4 // Padding between image and title
let menuButton = UIButton()
menuButton.configuration = config
Objective C:
UIImageSymbolConfiguration * configuration = [UIImageSymbolConfiguration configurationWithPointSize:30 weight:UIImageSymbolWeightBold scale:UIImageSymbolScaleLarge];
UIImage * image = [UIImage systemImageNamed:#"" withConfiguration:configuration];
[_btn setImage:image forState:UIControlStateNormal];

How to get Inset Buttons like that of iOS Maps app modal?

Swift 4.2 implemented views programmatically only
I have created a stack view and put four buttons in it but they are just simple buttons without any gray background.
I want to achieve the exact four buttons in my stackview equally centered as like as -
button.contentEdgeInset //Not working
This is what I tried -
let feedbackButton:UIButton = {
let origImage = UIImage(named: "feedback")
let tintedImage = origImage?.withRenderingMode(.alwaysTemplate)
let button = UIButton(frame: CGRect(x: 0, y: 0, width: 100, height: 50))
button.translatesAutoresizingMaskIntoConstraints = false
button.setBackgroundImage(tintedImage, for: UIControl.State.normal)
button.tintColor = .systemPinkColor
button.layer.cornerRadius = 7
button.backgroundColor = UIColor.lightGray.withAlphaComponent(0.5)
button.contentEdgeInsets = UIEdgeInsets(top: 0, left: 40, bottom: 0, right: 40)
// button.imageEdgeInsets = UIEdgeInsets(top: 0, left: 50, bottom: 0, right: 50)
// button.titleEdgeInsets = UIEdgeInsets(top: 0, left: 50, bottom: 0, right: 50)
button.clipsToBounds = true
button.addTarget(self, action: #selector(feedbackFaculty), for: .touchUpInside)
return button
}()
Output -
The button's image gets stretched along with insets. button.imageInsets and button.titleInsets not working.
Help me out. Thanks!
The background image doesn't follow the content insets. So this line:
button.setBackgroundImage(tintedImage, for: UIControl.State.normal)
needs to be changed to:
button.setImage(tintedImage, for: .normal)
Also, here's a couple things to note (per Apple's UIButton documentation):
Supply a title string or image; size the button appropriately for your content.
Which implies that you cannot set an image and title at the same time, this might be why you're noticing titleInset and imageInset not playing nicely.
However, if you just set appropriate constraints for the buttons and set insets for the title OR the image you should be able to get the look you want. Also make sure your stack view is configured to use equal spacing for it's distribution.
The imageInset for each button in the image below is (20, 20, 20, 20).

UIButton titleLabel text bottom to its frame

How can i display the UIButton titleLabel text to bottom of its frame. Currently i am using the UIEdge top margin and setting the negative UIButton image width, result is not as expected. i also want to place the image center to its frame.
`
let leftButton: UIButton = {
let button = UIButton()
button.layer.borderWidth = 2
button.layer.borderColor = UIColor.ublGray1().cgColor
button.setImage(UIImage.init(named: leftButtonImage)?.withRenderingMode(.alwaysTemplate), for: .normal)
button.tintColor = UIColor.cerulean()
button.layer.masksToBounds = false
button.layer.cornerRadius = 37
button.translatesAutoresizingMaskIntoConstraints = false
button.setTitle(leftButtonTitle, for: .normal)
button.titleEdgeInsets = UIEdgeInsets(top: 110, left: -26, bottom: 0, right: 0)[![enter image description here][1]][1]
button.imageEdgeInsets = UIEdgeInsets(top: 0, left: 10, bottom: 0, right: 0)
button.setTitleColor(UIColor.charcoalGrey(), for: .normal)
button.titleLabel?.font = UIFont.aspiraMedium(size: 16)
return button
}()
`
You can try something like this.
How about setting "Title Insets" - bottom - to a negative number? It works.
But if you want it to stick to the bottom of the frame, it won't work, so... how about this:
bt.titleEdgeInsets.top = (bt.imageView?.safeAreaInsets.bottom)!
or bt.titleEdgeInsets.top = (bt.imageView?.alignmentRectInsets.bottom)!

UIButton UIEdgeInsets doesn't work

So I've looked at all projects on Stack Overflow for adding edge insets for UIImages in a UIButton but none of them worked. When I build the project, the image is just set through the bounds of the button - it's not set to the insets and I don't know why. Here is the code:
let Settingsbutton = AnimatableButton(frame: CGRect(x: 23, y: 30, width: 40, height: 40))
Settingsbutton.layer.cornerRadius = Settingsbutton.frame.size.height / 2
Settingsbutton.layer.backgroundColor = UIColor.white
let roundedButton3 = UIButton(type: .custom)
roundedButton3.frame = Settingsbutton.frame
let _border3 = CAShapeLayer()
_border3.path = UIBezierPath(roundedRect: roundedButton3.bounds, cornerRadius:roundedButton3.frame.size.width/2).cgPath
_border3.frame = roundedButton3.bounds
_border3.strokeColor = UIColor.white.cgColor
_border3.fillColor = UIColor.clear.cgColor
_border3.lineWidth = 3.0
Settingsbutton.imageEdgeInsets = UIEdgeInsetsMake(10, 10, 10, 10)
Settingsbutton.contentVerticalAlignment = .fill
Settingsbutton.contentHorizontalAlignment = .fill
Settingsbutton.layer.addSublayer(_border3)
self.view.addSubview(Settingsbutton)
self.view.bringSubview(toFront: Settingsbutton)
if PFUser.current() == nil{
Settingsbutton.setBackgroundImage(UIImage(named: "padlock"), for: .normal)
}else{
}
imageEdgeInsets are for positioning the image NOT the background image!
Use setImage instead of setBackgroundImage
If AnimatableButton is a UIButton why you want to add button inside button? I don't know really what's your purpose but you might try
Settingsbutton.contentEdgeInsets = UIEdgeInsetsMake(10, 10, 10, 10)

Resizing a background image on UIButton

I am trying to add a "calendar day" image to surround some text on a clickable UI button like so:
let button = UIButton()
let X_Offset : CGFloat = (95 * CGFloat(buttonCount) ) + 10
let scrollHeight = scrollView.bounds.height
button.frame = CGRect(x: X_Offset, y: scrollHeight/6, width: 70, height: 60)
let buttonText = event.startTime.toShortDayOfWeekString() + "\n" + event.startTime.toShortDayOfMonthString()
button.titleLabel!.lineBreakMode = .byWordWrapping
button.titleLabel!.textAlignment = .center
button.setTitle(buttonText, for: .normal)
button.tag = i
button.backgroundColor = CompanyColor.Red.color
let image = UIImage(named: "calendarDay")
button.setBackgroundImage(image, for: .normal)
button.titleLabel?.font = UIFont(name: "Roboto", size: 14)
button.layer.cornerRadius = 8
button.clipsToBounds = true
But the image is encroaching on the text a bit too much:
How can I get the background image to scale up slightly and leave enough gap for the text?
I think what you what you are looking for is setting imageEdgeInsets for UIButton. Setting of these properties lets you move image around besides its default position. You have to play around to get your desired result.
There are two ways you can do this. One is using Interface Builder and other one is programmatically. Interface builder is easiest way to go I guess. Below image shows how can you set those properties for UIButton.
or try using programmatically like this
button.imageEdgeInsets = UIEdgeInsets(top: -10, left: 32, bottom: -10, right: 50)
You can move title like this
button.titleEdgeInsets = UIEdgeInsets(top: 0, left:0, bottom: 0, right: 20)
Note: Setting UIEdgeInsets like this might have different result if you have dynamic size button e.g. for different screen size. Always make sure that it looks as expected for all screen sizes.

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