How to check if a button has this image - ios

Question

I want to check if myButton has a named image.
I try this but it doesn't work
if (myButton.currentImage?.isEqual(UIImage(named: "ButtonAppuyer.png")) != nil){
print("YES")
} else {
print("NO")
}
and this too doesn't work
if myButton.currentImage?.isEqual(UIImage(named: "ButtonAppuyer.png")){
print("YES")
} else {
print("NO")
}

Answer 1

Here is what I came up with in Swift 3.0.
if let myButtonImage = myButton.image(for: .normal),
let buttonAppuyerImage = UIImage(named: "ButtonAppuyer.png"),
UIImagePNGRepresentation(myButtonImage) == UIImagePNGRepresentation(buttonAppuyerImage)
{
print("YES")
} else {
print("NO")
}
This could be cleaned up a lot.
extension UIButton {
func hasImage(named imageName: String, for state: UIControlState) -> Bool {
guard let buttonImage = image(for: state), let namedImage = UIImage(named: imageName) else {
return false
}
return UIImagePNGRepresentation(buttonImage) == UIImagePNGRepresentation(namedImage)
}
}
Then use it
if myButton.hasImage(named: "ButtonAppuyer.png", for: .normal) {
print("YES")
} else {
print("NO")
}

Answer 2

in swift 4.2 and Xcode 10.1
buttonOne.image(for: .normal)!.pngData() == UIImage(named: "selected")!.pngData()

Answer 3

You can convert the button's image and the named image to NSDatas and compare the two data objects:
let imgData1 = UIImagePNGRepresentation(buttonImage)
let imgData2 = UIImagePNGRepresentation(namedImage)
let equal = imgData1 == imgData2
Note that this will only work if the two images are completely identical (e.g. come from the same source file); if one is a scaled down version of the other, it won't work.
Also, it should be mentioned that this can be a pretty expensive operation and should not be run frequently.

Answer 4

There is no way to retrieve the image name from a UI element. You will need to store the value you want to retrieve in another location.
For instance, you could create a custom subclass of UIButton that contains an additional property to store the image name or other identifying data.

Answer 5

if let ButtonImage = myButton.image(for: .normal),
let Image = UIImage(named: "ButtonAppuyer.png"),
UIImagePNGRepresentation(ButtonImage) == UIImagePNGRepresentation(Image)
{
print("YES")
} else {
print("NO")
}

Answer 6

if myCell.followButton.currentImage.isEqual(UIImage(named: "yourImageName")) {
//do something here
}