Swift 4 - Creating a common function for multiple buttons - swift

Question

I'm wondering if there is a more efficient way to code an action that is the same with the exception of which button has been pressed and which item in a struct it relates to. Basically, I have a struct of 10 variables all of which are a boolean type and I have 10 buttons. When the user presses the button, I want to check whether it has already been pressed (using the struct) and then change the background of the button depending on the state and reverse the state. I've copied my current code for one of the buttons but thought I should be able to avoid doing this 10 times!
#IBAction func architectureButtonPressed(_ sender: Any) {
if myInterests.architecture {
myInterests.architecture = false
architectureButton.setBackgroundImage(imageUncheckedNarrow, for: .normal)
} else {
myInterests.architecture = true
architectureButton.setBackgroundImage(imageCheckedNarrow, for: .normal)
}
}

Answer 1

Well one simple way is to have each UIButton point to the same architectureButtonPressed IBAction method. Since the button that's pressed is passed into the method (sender) you can consult it's tag property to know the index of which field in your struct should be updated. (And then you might want to change your struct to just store an array of 10 bools, but up to you).
Then for each UIButton, whether programmatically in storyboard or nib, you'd assign the appropriate index value to the button's tag field.

Answer 2

Create yours IBOutlet for each button.
Create a array and store all buttons like : var arrayButtons : [UIButton] = []
arrayButtons.append[button1]
arrayButtons.append[button2]
...
Create a array of booleans to store true/false: var arrayBools : [Bool] = [] and initialize if some value.
Note that the indexes of the arrayButtons and arrayBools must be same related.
Create selector function to listen touch buttons.
button.addTarget(self, action: #selector(my_func), for: .touchUpInside)
#objc func my_func(_ sender : UIButton) {
for i in 0...arrayButtons.size-1 {
if arrayButtons[i] == sender {
if arrayBooleans[i] {
arrayBooleans[i] = false
arrayButtons[i].setImage()
} else {
arrayBooleans[i] = true
arrayButtons[i].setImage()
}
}
}
}

Answer 3

My suggestion is to manage the images in Interface Builder via State Config (Default/Selected)
Then assign an unique tag starting from 100 to each button and set the isSelected value in the IBAction to the corresponding struct member in a switch statement:
#IBAction func buttonPressed(_ sender: UIButton) {
switch sender.tag {
case 100: myInterests.architecture = sender.isSelected
case 101: myInterests.art = sender.isSelected
...
default: break
}
}
Alternatively use Swift's native KVC with WriteableKeypath
let keypaths : [WritableKeyPath<Interests,Bool>] = [\.architecture, \.art, \.fashion, \.history, \.localCulture, \.music, \.nature, \.shopping, \.sport, \.anything]
#IBAction func buttonPressed(_ sender: UIButton) {
let index = sender.tag - 100
let keypath = keypaths[index]
myInterests[keyPath: keypath] = sender.isSelected
}