How to adjust an UIButton's imageSize?

Question

How can I adjust the image size of the UIButton? I am setting the image like this:

[myLikesButton setImage:[UIImage imageNamed:@\"icon-heart.png\"] forState:UICo         


        

Answer 1

Updated for Swift > 5

set the size:

button.frame = CGRect(x: 0, y: 0, width: 44, height: 44)

---

set margins:

button.imageEdgeInsets = UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10)

Answer 2

If I understand correctly what you're trying to do, you need to play with the buttons image edge inset. Something like:

myLikesButton.imageEdgeInsets = UIEdgeInsets(top: 30, left: 30, bottom: 30, right: 30)

Answer 3

Swift 3

I set myButton width and height to 40 and my padding from EdgeInsetsMake is 15 all sides. I suggest to add a background color to your button to see the actual padding.

myButton.backgroundColor = UIColor.gray // sample color to check padding
myButton.imageView?.contentMode = .scaleAspectFit
myButton.imageEdgeInsets = UIEdgeInsetsMake(15, 15, 15, 15)

Answer 4

One approach is to resize the UIImage in code like the following. Note: this code only scales by height, but you can easily adjust the function to scale by width as well.

let targetHeight = CGFloat(28)
let newImage = resizeImage(image: UIImage(named: "Image.png")!, targetHeight: targetHeight)
button.setImage(newImage, for: .normal)

fileprivate func resizeImage(image: UIImage, targetHeight: CGFloat) -> UIImage {
    // Get current image size
    let size = image.size

    // Compute scaled, new size
    let heightRatio = targetHeight / size.height
    let newSize = CGSize(width: size.width * heightRatio, height: size.height * heightRatio)
    let rect = CGRect(x: 0, y: 0, width: newSize.width, height: newSize.height)

    // Create new image
    UIGraphicsBeginImageContextWithOptions(newSize, false, 0)
    image.draw(in: rect)
    let newImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

    // Return new image
    return newImage!
}

Answer 5

Heres the Swift version:

myButton.imageEdgeInsets = UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10)

Answer 6

you can use imageEdgeInsets property The inset or outset margins for the rectangle around the button’s image.

 [self.btn setImageEdgeInsets:UIEdgeInsetsMake(6, 6, 6, 6)];

A positive value shrinks, or insets, that edge—moving. A negative value expands, or outsets, that edge.