Find a view at specific location in swift - swift

Question

I have got a simple view in swift and put 9 buttons as a 3x3 grid onto it, now i need the tag for each button and don't know how to get each button so I can get the tag property using a for loop. Does anyone know how i can get the button? Is there a function to get a view at a specified location?

Answer 1

Frankenstein's answer with .subviews works fine, but you can even do it more swifter using the built-in function viewWithTag(_:):
override func viewDidLoad() {
super.viewDidLoad()
// ...
// targeted view must have been added to the subview by now
if let taggedView = view.viewWithTag(1) {
print("Got the view!")
}
// you can even try to cast directly
if let taggedButton = view.viewWithTag(1) as? UIButton {
print("Got the button!")
}
// if you insist on using a for loop, you could use it like this
let highestTag = 10
for i in 0...highestTag {
if let taggedButton = view.viewWithTag(i) as? UIButton {
// here you go
}
}
}
For both approaches keep in mind, that the view you're looking for has already been added as a subview beforehand, otherwise you won't be able to search for it

Answer 2

You can use the subviews property of UIView and loop through each subview to check for tag you need:
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
for subview in view.subviews {
if subview.tag == 1, let button = subview as? UIButton {
print("Got the button I need.")
}
}
if let button = view.viewWithTag(1) as? UIButton {
print("Got the button I need.")
}
}
}
Update: You can also use viewWithTag to find you view with a particular tag from within your subviews.