Just trying to remove the first character from a string in Swift. I use the code written below, but the second line keeps crashing my application.
Is this not the correct way to unwrap a String Index? What is?
var tempText = text
let toRemove = tempText?.startIndex ?? String.Index(0)
tempText?.remove(at: toRemove)
You can use Collection method dropFirst:
if let text = text { // you need also to unwrap your optional
let tempText = String(text.characters.dropFirst()) // And initialize a new String with your CharacterView
}
In Swift 4 String conforms to Collection so you can use it directly on your string:
if let text = text {
let tempText = text.dropFirst() // "bc"
}
You are initializing a String.Index type instead of getting the index of the tempText string.
Moreover, startIndex is not an optional, tempText, however, is.
You should check if tempText exists and is not empty (you can simply do this with an if let), and remove the character at startIndex if it matches those conditions.
var tempText = text
if let toRemove = tempText?.startIndex {
tempText?.remove(at: toRemove)
}
tempText = tempText?.characters.dropFirst().map(String.init) ?? tempTextIf you are using swift 4, you can use:
var tempText = text.dropFirst()
