ios - Assign Text in Code to UILabel! Swift 2.2 -

using tutorial ios 8/swift 1 create sample app in attempt assign text label, using xcode 7.3/swift 2.2. in advance.

import uikit  class viewcontroller: uiviewcontroller {      @iboutlet var agecat: uitextfield!      @iboutlet var resultage: uilabel!      @ibaction func findagebutton(sender: anyobject) {          var enteredage = int(agecat.text!)          var catyears = enteredage! * 7          resultage = "your cat \(catyears) in cat years"      } } 

replace ibaction func findagebutton following:

@ibaction func findagebutton(sender: anyobject) {  // here variable unwrapped. means code after not executed unless program sure contains value. if let text =  agecat.text {     // can use unwrapped variable , won't have place exclamation mark behind force unwrap it.      let enteredage = int(text)      if let age  = enteredage {       let catyears = age * 7       resultage.text = "your cat \(catyears) in cat years"    }   } }