在Swift 3.0中使用NSDataDetector从字符串中提取地址元素 [英] Extracting address elements from a String using NSDataDetector in Swift 3.0

问题描述

我正在尝试使用 NSDataDetector 来处理字符串中的地址.我看过 NSHipster在 NSDataDetector 上的文章以及 Apple的NSDataDetector文档.我有以下方法可以将地址从字符串中拉出:

I'm attempting to use NSDataDetector to addresses from a string. I've taken a look at NSHipster's article on NSDataDetector as well as Apple's NSDataDetector documentation. I've got the following method to the point where it'll pull addresses out of a string:

func getAddress(from dataString: String) -> [String] {
    let detector = try! NSDataDetector(types: NSTextCheckingResult.CheckingType.address.rawValue)
    let matches = detector.matches(in: dataString, options: [], range: NSRange(location: 0, length: dataString.utf16.count))

    var addressArray = [String]()

    // put matches into array of Strings
    for match in matches {
        let address = (dataString as NSString).substring(with: match.range)
        addressArray.append(address)
    }

    return addressArray
}

我想提取地址的元素，而不是整个地址.在数据检测器匹配类型中的 NSHipster的 NSDataDetector 帖子中.部分，我看到了诸如 NSTextCheckingCityKey ， NSTextCheckingStateKey 和

I'd like to pull out elements of addresses, not the entire address. In NSHipster's NSDataDetector post in the Data Detector Match Types section, I see address components such as NSTextCheckingCityKey, NSTextCheckingStateKey, and NSTextCheckingZIPKey. I'm unable to use those keys in the NSDataDetector's initialization.

我在GitHub上挖了一下，看看是否可以找到一个婴儿床的例子，但是我唯一能找到的东西是Swift主仓库中的Objective-C代码或声明性东西.

I dug around on GitHub to see if I could find an example to crib from, but the only stuff I'm able to find is Objective-C code or declarative stuff in the master Swift repo.

我有99％的把握可以提取地址的各个组成部分，但我太笨了，无法弄清楚.感谢您的阅读.我欢迎您提出建议.

I'm 99% sure I can pull out the individual components of an address, but I'm too dumb to figure it out. Thank you for reading. I welcome suggestions.

推荐答案

我以前没有使用过此类，但看起来它返回了 NSTextCheckingResult 类型的对象.如果得到类型为 NSTextCheckingTypeAddress 的结果，则可以要求结果为它的 addressComponents ，它将是包含地址不同部分的字典.

I haven't used this class before, but it looks like it returns objects of type NSTextCheckingResult. If you get a result of type NSTextCheckingTypeAddress then you can ask the result for it's addressComponents, which will be a dictionary containing the different parts of the address.

这是我刚刚打过的一些有效的游乐场代码:

Here is some working playground code I just banged out:

import UIKit

var string = "Now is the time for all good programmers to babble incoherently.\n" +
"Now is the time for all good programmers to babble incoherently.\n" +
"Now is the time for all good programmers to babble incoherently.\n" +
"123 Elm Street\n" +
"Daton, OH 45404\n" +
"Now is the time for all good programmers to babble incoherently.\n" +
"2152 E Street NE\n" +
"Washington, DC 20001"

let results = getAddress(from: string)

print("matched \(results.count) addresses")
for result in results {
  let city = result[NSTextCheckingCityKey] ?? ""
  print("address dict = \(result).")
  print("    City = \"\(city)\"")
}

func getAddress(from dataString: String) -> [[String: String]] {
  let detector = try! NSDataDetector(types: NSTextCheckingResult.CheckingType.address.rawValue)
  let matches = detector.matches(in: dataString, options: [], range: NSRange(location: 0, length: dataString.utf16.count))

  var resultsArray =  [[String: String]]()
  // put matches into array of Strings
  for match in matches {
    if match.resultType == .address,
      let components = match.addressComponents {
      resultsArray.append(components)
    } else {
      print("no components found")
    }
  }
  return resultsArray
}

此代码显示:

匹配2个地址

address dict = ["Street":"123 Elm Street"，"ZIP":"45404"，"City":"Daton"，"State":"OH"].城市=道顿"

address dict = ["Street": "123 Elm Street", "ZIP": "45404", "City": "Daton", "State": "OH"]. City = "Daton"

address dict = ["Street":"2152 E Street NE"，"ZIP":"20001"，"City":华盛顿"，"State":"DC"].城市=华盛顿"

address dict = ["Street": "2152 E Street NE", "ZIP": "20001", "City": "Washington", "State": "DC"]. City = "Washington"

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