ios - How to adjust an UIButton's imageSize?

Ios - How to adjust an UIButton's imageSize?

To adjust the size of a UIButton's image in iOS, you can control both the size of the button itself and the size of the image within it. Here's how you can achieve this programmatically in Swift:

Adjust Button Size

If you want to adjust the overall size of the UIButton, you can set its frame or use Auto Layout constraints.

Using Frame:

let button = UIButton(type: .custom) button.frame = CGRect(x: 50, y: 50, width: 100, height: 100)

Using Auto Layout:

let button = UIButton(type: .custom) button.translatesAutoresizingMaskIntoConstraints = false view.addSubview(button) // Example constraints button.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true button.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true button.widthAnchor.constraint(equalToConstant: 100).isActive = true button.heightAnchor.constraint(equalToConstant: 100).isActive = true

Adjust Image Size

To adjust the size of the image within the button, you can set the contentMode property of the button's imageView.

button.imageView?.contentMode = .scaleAspectFit // Adjust according to your needs

Setting Image for the Button

Finally, set the image for the button using setImage(_:for:) method:

let image = UIImage(named: "yourImageName") button.setImage(image, for: .normal)

Complete Example

Here's a complete example that sets up a button with a custom image:

import UIKit class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() let button = UIButton(type: .custom) button.translatesAutoresizingMaskIntoConstraints = false view.addSubview(button) // Example constraints button.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true button.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true button.widthAnchor.constraint(equalToConstant: 100).isActive = true button.heightAnchor.constraint(equalToConstant: 100).isActive = true button.imageView?.contentMode = .scaleAspectFit let image = UIImage(named: "yourImageName") button.setImage(image, for: .normal) } }

Notes:

  • Adjust the contentMode property of button.imageView to control how the image scales within the button's bounds (scaleAspectFit, scaleAspectFill, etc.).
  • Ensure that the image you set (UIImage(named: "yourImageName")) exists in your project assets or bundle.

By using these techniques, you can effectively adjust the size of both the UIButton and its image according to your application's requirements in iOS. Adjust constraints, frames, and content modes as needed to achieve the desired appearance and behavior.

Examples

  1. How to resize UIButton image in iOS

    Description: Adjusting the image size of a UIButton by setting the imageEdgeInsets.

    Code:

    import UIKit class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() let button = UIButton(type: .system) button.frame = CGRect(x: 100, y: 100, width: 200, height: 50) button.setTitle("Button", for: .normal) button.setImage(UIImage(named: "example.png"), for: .normal) button.imageEdgeInsets = UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10) view.addSubview(button) } }

  2. UIButton setImage size programmatically in Swift

    Description: Setting the image size of a UIButton programmatically by manipulating the image view's frame.

    Code:

    import UIKit class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() let button = UIButton(type: .system) button.frame = CGRect(x: 100, y: 100, width: 200, height: 50) button.setTitle("Button", for: .normal) let image = UIImage(named: "example.png") let resizedImage = resizeImage(image: image!, targetSize: CGSize(width: 40, height: 40)) button.setImage(resizedImage, for: .normal) view.addSubview(button) } func resizeImage(image: UIImage, targetSize: CGSize) -> UIImage { let size = image.size let widthRatio = targetSize.width / size.width let heightRatio = targetSize.height / size.height var newSize: CGSize if widthRatio > heightRatio { newSize = CGSize(width: size.width * heightRatio, height: size.height * heightRatio) } else { newSize = CGSize(width: size.width * widthRatio, height: size.height * widthRatio) } let rect = CGRect(origin: .zero, size: newSize) UIGraphicsBeginImageContextWithOptions(newSize, false, 0.0) image.draw(in: rect) let newImage = UIGraphicsGetImageFromCurrentImageContext() UIGraphicsEndImageContext() return newImage! } }

  3. Adjust UIButton image size and position in Swift

    Description: Adjusting the size and position of a UIButton image using content and image insets.

    Code:

    import UIKit class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() let button = UIButton(type: .system) button.frame = CGRect(x: 100, y: 100, width: 200, height: 50) button.setTitle("Button", for: .normal) button.setImage(UIImage(named: "example.png"), for: .normal) button.contentVerticalAlignment = .fill button.contentHorizontalAlignment = .fill button.imageEdgeInsets = UIEdgeInsets(top: 5, left: 5, bottom: 5, right: 5) view.addSubview(button) } }

  4. How to scale UIButton image in Swift

    Description: Scaling a UIButton image by setting its imageView content mode.

    Code:

    import UIKit class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() let button = UIButton(type: .system) button.frame = CGRect(x: 100, y: 100, width: 200, height: 50) button.setTitle("Button", for: .normal) button.setImage(UIImage(named: "example.png"), for: .normal) button.imageView?.contentMode = .scaleAspectFit view.addSubview(button) } }

  5. Setting UIButton image to specific size in iOS

    Description: Setting a UIButton image to a specific size using auto layout constraints.

    Code:

    import UIKit class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() let button = UIButton(type: .system) button.translatesAutoresizingMaskIntoConstraints = false button.setTitle("Button", for: .normal) button.setImage(UIImage(named: "example.png"), for: .normal) view.addSubview(button) NSLayoutConstraint.activate([ button.centerXAnchor.constraint(equalTo: view.centerXAnchor), button.centerYAnchor.constraint(equalTo: view.centerYAnchor), button.widthAnchor.constraint(equalToConstant: 200), button.heightAnchor.constraint(equalToConstant: 50) ]) button.imageView?.translatesAutoresizingMaskIntoConstraints = false NSLayoutConstraint.activate([ button.imageView!.widthAnchor.constraint(equalToConstant: 40), button.imageView!.heightAnchor.constraint(equalToConstant: 40), button.imageView!.centerYAnchor.constraint(equalTo: button.centerYAnchor), button.imageView!.leadingAnchor.constraint(equalTo: button.leadingAnchor, constant: 10) ]) } }

  6. Resize UIButton image without changing UIButton size

    Description: Resizing a UIButton image while keeping the UIButton size unchanged.

    Code:

    import UIKit class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() let button = UIButton(type: .system) button.frame = CGRect(x: 100, y: 100, width: 200, height: 50) button.setTitle("Button", for: .normal) let image = UIImage(named: "example.png") let resizedImage = image?.resized(to: CGSize(width: 30, height: 30)) button.setImage(resizedImage, for: .normal) view.addSubview(button) } } extension UIImage { func resized(to size: CGSize) -> UIImage? { UIGraphicsBeginImageContextWithOptions(size, false, 0.0) draw(in: CGRect(origin: .zero, size: size)) let resizedImage = UIGraphicsGetImageFromCurrentImageContext() UIGraphicsEndImageContext() return resizedImage } }

  7. How to use imageEdgeInsets to resize UIButton image

    Description: Using imageEdgeInsets to resize and position a UIButton image.

    Code:

    import UIKit class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() let button = UIButton(type: .system) button.frame = CGRect(x: 100, y: 100, width: 200, height: 50) button.setTitle("Button", for: .normal) button.setImage(UIImage(named: "example.png"), for: .normal) button.imageEdgeInsets = UIEdgeInsets(top: 0, left: -10, bottom: 0, right: 0) button.titleEdgeInsets = UIEdgeInsets(top: 0, left: 10, bottom: 0, right: 0) view.addSubview(button) } }

  8. UIButton image with fixed size using aspect ratio in Swift

    Description: Maintaining a fixed size for a UIButton image using aspect ratio constraints.

    Code:

    import UIKit class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() let button = UIButton(type: .system) button.translatesAutoresizingMaskIntoConstraints = false button.setTitle("Button", for: .normal) button.setImage(UIImage(named: "example.png"), for: .normal) view.addSubview(button) NSLayoutConstraint.activate([ button.centerXAnchor.constraint(equalTo: view.centerXAnchor), button.centerYAnchor.constraint(equalTo: view.centerYAnchor), button.widthAnchor.constraint(equalToConstant: 200), button.heightAnchor.constraint(equalToConstant: 50) ]) button.imageView?.translatesAutoresizingMaskIntoConstraints = false if let imageView = button.imageView { NSLayoutConstraint.activate([ imageView.widthAnchor.constraint(equalToConstant: 40), imageView.heightAnchor.constraint(equalTo: imageView.widthAnchor, multiplier: 1.0) ]) } } }

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