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iosarraysswiftarc4random

select random image from two different arrays

I need to send an image to UIImageView randomly from two different arrays. I am not sure how do i proceed with this? 

var imgSetOne: [String] = ["car1.png", "car2.png", "car3.png", "car4.png", "car5.png"]
let imgOneRandom = Int(arc4random_uniform(5))

var imgSetTwo: [String] = ["bus1.png", "bus2.png", "bus3.png", "bus4.png", "bus5.png"]
let imgTwoRandom = Int(arc4random_uniform(5))

UIImage(named: imgSetOne[imgOneRandom]) OR UIImage(named: imgSetTwo[imgTwoRandom])

I am trying to select random image from first array and second array using arc4random_uniform. Now i want to display image either from first array result or second array result to the UIImageView.

Solution

  • If your arrays have the same size, then you can just select array to pick image randomly:

    let arrayIndex = Int(arc4random_uniform(2))
UIImage(named: arrayIndex == 0 ? imgSetOne[imgOneRandom] : imgSetTwo[imgTwoRandom])

    Note that if arrays have different size and you still want to choose each image from both arrays with same probability you will need to tweak this logic a little (will leave it as a homework excersize)