Swift

Question 1

In swift:

Function to retrieve a count of the characters of a string

Answer 1

countElements ()

Question 2

In swift:

How can load xib file

Answer 2

NSBundle.mainBundle().loadNibNamed: owner: options:

Other way:
UINib(nibName: bundle:)
nib.instantiateWithOwner: options:

Question 3

In swift:

How can compare two strings?

Answer 3

Using operator == and !=

Question 4

In swift:

String method to check prefix and suffix.

Answer 4

hasPrefix (“”)

hasSuffix (“”)

Question 5

In swift:

How can be converted an int to String?

Answer 5

Using casting:

String(intValue)

Question 6

In swift:

How to convert a string to integer?

Answer 6

stringVar.toInt()

Question 7

In swift:

How to iterate an array and know the index and value?

Answer 7

Using enumerate function:

for (index, value) in enumerate(shoppingList) {
println(“Item (index + 1): (value)”)
}

Question 8

In swift:

Method to remove an element of an array?

Answer 8

removeAtIndex()

Question 9

In swift:

Function to know if an array contains an element?

Answer 9

contains( , value)

Question 10

In swift:
A shorthand for code:
a != nil ? a! : b

Answer 10

(a ?? b)

Question 11

In swift:

How to load a ViewController from Storyboard?

Answer 11

UIStoryboard(name: “Main”, bundle: nil).instantiateViewControllerWithIdentifier(“AnID”) as MyViewController