CODEWITHSUNDEEP
iosswift
Im Batman
Im Batman

Reputation: 1876

Extract a name from a sentence

I need to get persons name from a sentence.

Example : My Name is David Bonds and i live in new york. and I want to extract name David Bonds.

My Name is is definitely will be in every sentence. but after the name it can contains rest of the sentence or may be nothing. from this answer I was able to get to the point of My Name is. but it will print out rest of all the sentence. i want to make sure it will grab only next two words only. 

 if let range = conversation.range(of: "My Name is") {
    let name = conversation.substring(from: range.upperBound).trimmingCharacters(in: .whitespacesAndNewlines)
    print(name)
 }

Upvotes: 1

Views: 874

Answers (6)

Abizern
Abizern

Reputation: 150615

It's almost time for Swift 4, iOS 11 in which using NSLinguisticTagger is a bit easier.

So, for future reference, you can use NSLinguisticTagger to extract a name from a sentence. This doesn't depend on the name following a named token, or a two word name.

This is from an Xcode 9 Playground

import UIKit

let sentence = "My Name is David Bonds and I live in new york."

// Create the tagger's options and language scheme
let options: NSLinguisticTagger.Options = [.omitWhitespace, .omitPunctuation, .joinNames]
let schemes = NSLinguisticTagger.availableTagSchemes(forLanguage: "en")

// Create a tagger
let tagger = NSLinguisticTagger(tagSchemes: schemes, options: Int(options.rawValue))
tagger.string = sentence
let range = NSRange(location: 0, length: sentence.count)

// Enumerate the found tags. In this case print a name if it is found.
tagger.enumerateTags(in: range, unit: .word, scheme: .nameType, options: options) { (tag, tokenRange, _) in
    guard let tag = tag, tag == .personalName else { return }
    let name = (sentence as NSString).substring(with: tokenRange)
    print(name) // -> Prints "David Bonds" to the console.
}

Edited September 2023

It's been a while since I wrote this answer and things have changed. NSLinguisticTagger was deprecated in iOS 14 in favour of the new NaturalLanguage framework

A modern version of doing this is now:

import UIKit
import NaturalLanguage

let text = "My Name is David Bonds and I live in new york."

// Create an NSTagger instance based on NameTypes
let tagger = NLTagger(tagSchemes: [.nameType])
tagger.string = text

// Configure the tagger
let options: NLTagger.Options = [.joinNames]
let tags: [NLTag] = [.personalName]

tagger.enumerateTags(in: text.startIndex..<text.endIndex, unit: .word, scheme: .nameType, options: options) { tag, tokenRange in
    // Get the most likely tag, and print it if it's a named entity.
    if let tag = tag,
       tags.contains(tag) {
        print("\(text[tokenRange])")
    }
   return true
}

Upvotes: 8

XmasRights
XmasRights

Reputation: 1509

Depending on how you want the data:

let string = "My Name is David Bonds and i live in new york."

let names = string.components(separatedBy: " ")[3...4]
let name  = names.joined(separator: " ")

Upvotes: 0

Rahul Kumar
Rahul Kumar

Reputation: 3157

You can remove the prefix string "My Name is David " and then separate it by " ".

var sentence = "My Name is David Bonds and"
let prefix = "My Name is "

sentence.removeSubrange(sentence.range(of: prefix)!)
let array = sentence.components(separatedBy: " ")
print("Name: ", array[0],array[1])  // Name:  David Bonds

Upvotes: 0

dahiya_boy
dahiya_boy

Reputation: 9503

Use below code

let sen = "My Name is David Bonds and i live in new york."

let arrSen = sen.components(separatedBy: "My Name is ")
print(arrSen)

let sen0 = arrSen[1]

let arrsen0 = sen0.components(separatedBy: " ")
print("\(arrsen0[0]) \(arrsen0[1])")

Output:

enter image description here

Upvotes: 1

Ahmad F
Ahmad F

Reputation: 31645

You could implement it as follows:

let myString = "My Name is David Bonds and i live in new york."

// all words after "My Name is"
let words = String(myString.characters.dropFirst(11)).components(separatedBy: " ")

let name = words[0] + " " + words[1]

print(name) // David Bonds

As a remark, dropFirst(11) should works fine if you are pretty sure that "My Name is " should be before the name, since its number of character is 11.

Upvotes: 2

Svetoslav Bramchev
Svetoslav Bramchev

Reputation: 433

When you have rest of the text you can separate it by " ". Then first and secont elements are first and last name

let array = text.components(separatedBy: " ")

//first name
print(array[0])

//last name
print(array[1])

Upvotes: 3

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