Swift How to get integer from string and convert it into integer

Question

I need to extract numbers from string and put them into a new array in Swift.

var str = "I have to buy 3 apples, 7 bananas, 10eggs" 

I tried to loop each characters and I have no idea to compare between Characters and Int.

Answer 1

Swift 3/4

let string = "0kaksd020dk2kfj2123" if let number = Int(string.components(separatedBy: CharacterSet.decimalDigits.inverted).joined()) {     // Do something with this number } 

You can also make an extension like:

extension Int {     static func parse(from string: String) -> Int? {         return Int(string.components(separatedBy: CharacterSet.decimalDigits.inverted).joined())     } } 

And then later use it like:

if let number = Int.parse(from: "0kaksd020dk2kfj2123") {      // Do something with this number }