Swift on Xcode - Array index with multiple values

Question

How do I add multiple Strings to one index in an Array? I had:

var cardNamesArray:[String] = ["card5", "card6", "card7", "card8", "card9", "card10", "card11", "card12"]

With, card5 at index 0, card6 at index 1, card7 at index 2, and so on. I want to assign card5, card6, card7, and card 8 to index 0, and card 9, card 10, card11, card12 to index 1. Can someone please tell me how to done this?

Is there any way I can do this without making an Array of Arrays and just assigning the cards to the index value?

var cardNamesArray:[[String]] = [["card5", "card6", "card7", "card8"], ["card9", "card10", "card11", "card12"]]

After making an Array of Arrays, I have only 2 indicies as I need, however I can't seem to call the String later on in Xcode. I have a UIButton randomizing a number and I want to connect the number to an image represented by one of the cards, but I want four of them to be of the same value.

var firstRandomNumber: Int = Int(arc4random_uniform(2))

I run into an error on this line saying

"cannot convert value type '[string]' to specified type 'String'.

var firstCardString: String = self.cardNamesArray[firstRandomNumber]

However when I put a [ ] around String in the first line above, it runs and I incur and error on the next line saying

self.firstCardImageView.image = UIImage(named: firstCardString)

"cannot convert value type '[string]' to expected argument type 'string'."

I would really appreciate any help! Thanks.

Nirav D · Accepted Answer · 2016-08-19 05:26:15Z

2

You need to generate random number twice, first one for Array of Array, And second one for your card like this.

var cardNamesArray:[[String]] = [["card5", "card6", "card7", "card8"], ["card9", "card10", "card11", "card12"]]
var firstRandomNumber: Int = Int(arc4random_uniform(2))
var secondRandomNumber: Int = Int(arc4random_uniform(4))
var firstCardString: String = self.cardNamesArray[firstRandomNumber][secondRandomNumber]
self.firstCardImageView.image = UIImage(named: firstCardString)

answered Aug 19, 2016 at 5:26

Nirav D

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Comments

iSashok · Accepted Answer · 2016-08-19 05:22:04Z

0

You try to get string but your object is a Array that you declared before

var cardNamesArray:[[String]] = [["card5", "card6", "card7", "card8"], ["card9", "card10", "card11", "card12"]]

Change your code to this

var firstObjFromArray: Array = self.cardNamesArray[0]
var firstCardString: String = firstObjFromArray[firstRandomNumber]

answered Aug 19, 2016 at 5:22

iSashok

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