ios - Implementing UIButtons for selection in Swift -

i'm new ios development , i'm working on fire safety app. give user option of 3 risk levels: low, medium , high using (i suppose) 3 uibuttons user can tap, , ever 1 tap turn colour.

i've managed 3 uibuttons working, , can change colour when tapped if tap can't previous button change , i've had difficulties getting value them (for example when submitted if user pressed low use number 2 calculations)

to show did quick drawing: button example

thanks :)

==== edit ====

i using segmented control instead of uibuttons this. need know how use them in if statement

@iboutlet var riskchoice: uisegmentedcontrol! @iboutlet var valuelabel: uilabel! @iboutlet var calcbutton: uibutton!  @ibaction func calculate(sender: uibutton) {  if (riskchoice.selectedsegmentindex == 0){   valuelabel.text = string("low") } 

nothing appears in label have set up.. direct me here?

you can reset 3 buttons default state when of button tapped , highlight current button.

@ibaction func buttonclicked(sender: uibutton) {  /** reset button default state*/ resetallbuttons()  /** highlight current button */ sender.backgroundcolor = uicolor.redcolor() sender.titlecolor = uicolor.whitecolor() }   private func resetallbuttons() {  button1.backgroundcolor = uicolor.clearcolor() button1.titlecolor = uicolor.blackcolor() /// or use : button1.settitlecolor(uicolor.blackcolor, forstate: .normal)  button2.backgroundcolor = uicolor.clearcolor() button2.titlecolor = uicolor.blackcolor()  button3.backgroundcolor = uicolor.clearcolor() button3.titlecolor = uicolor.blackcolor() }