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Aaron Zheng
1,517 PointsHow do you generate a random number now? Since the arc4random_uniform does not exist in swift 2.
In building a simple app that generates random facts, I can't figure out anywhere how to generate random numbers.
3 Answers
Steven Deutsch
21,046 PointsHey Aaron Zheng,
So I believe that Pasan explains this in the Swift 2.0 track. It wouldn't be a bad idea for you to do the course Build A Simple iPhone App with Swift 2.0. It's the same app you're working on now. Let me see if I can help you solve the problem though.
In Swift 2.0, theres a better way to generate a random number. Using the GameKit framework.
// The first thing you need to do is import the GameKit framework
import GameKit
//Now we can use the GameKit framework to generate our random number using GKRandomSource
let randomNumber = GKRandomNumber.sharedRandom().nextIntWithUpperBound(upperBound: Int)
// For the upper bound argument, set it to the the name of your fact array and access .count on it
We use the .count property to determine the upperBound because this allows our code to be more flexible. If we hardcoded this value, instead of using .count, we would have to remember to change this anytime we changed the number of items in the fact array
David Montalvo
6,937 PointsIn fact it exists, it is just not shown by Xcode, if you use something like this, it will work!!
let randomNumber = Int(arc4random_uniform(UInt32(5))
That will create a random number from 0 to 5, so you can change the 5 by the number of random data you want, just remember to use the UInt32
Christian McMullin
13,086 PointsYou missed the last ) at the end.
let randomNumber = Int(arc4random_uniform(UInt32(5)))
Bevin Hernandez
6,513 PointsRight - but you can still get the count by counting the facts in the model like so (presuming you're not hanging out in the model at the moment):
//get your top end of the range
let maxNumber = UInt32(facts.count)
let randomNumber = Int(arc4random_uniform(maxNumber))
eberhapa
51,495 Pointseberhapa
51,495 PointsIs it good to use the whole gamekit import just for a random number?