（迅速）有人可以帮助我对这些按钮进行大量更改吗？

Question

here is the screenshot

when user get into this page, I want to change the background of those button. for example, when the level of user is 6, I want to change the top 6 background of buttons to a blue picture as first button. I don't wanna write a code one by one, so please help me to write a function, Thank you very much!

Answer 1

You can add you buttons to the array in order of increasing level and do something like this:

var buttons: [UIButton] // array of your buttons, next you need to init it
...
func setColorForUserLevel(userLevel: Int) {
    if userLevel > buttons.count {
        return
    } else {
        for i in 0...userLevel - 1 {
            buttons[i].backgroundColor = UIColor.blueColor()
        }
    }
}

I create simple example project to show how to use it:

1. I have outlets with UIButton! type and buttons object in code:

2. And i test setColorForUserLevel function in viewDidLoad method:

   override func viewDidLoad() { super.viewDidLoad()
   buttons = [button1, button2, button3] setColorForUserLevel(2) }