iOS detects URLs, phone numbers and other information in text

To detect URLs, phone numbers, etc. in text, in addition to using regular expressions, you can also use NSDataDetector.

1. Initialize NSDataDetector with
2. Call the matches(in:options:range:) method of NSDataDetector to obtain the NSTextCheckingResult array
3. Iterate through the NSTextCheckingResult array, get the corresponding detection results according to the type, and obtain the position range of the result text in the original text through range (NSRange)

The following example highlights the URL and phone number in NSMutableAttributedString.

func showAttributedStringLink(_ attributedStr: NSMutableAttributedString) {
  // We check URL and phone number
  let types: UInt64 =  | 
  // Get NSDataDetector
  guard let detector: NSDataDetector = try? NSDataDetector(types: types) else { return }
  // Get NSTextCheckingResult array
  let matches: [NSTextCheckingResult] = (in: , options: (rawValue: 0), range: NSRange(location: 0, length: ))
  // Go through and check result
  for match in matches {
    if  == .link, let url =  {
      // Get URL
      ([ NSLinkAttributeName : url,
                     NSForegroundColorAttributeName : ,
                     NSUnderlineStyleAttributeName :  ],
                    range: )
    } else if  == .phoneNumber, let phoneNumber =  {
      // Get phone number
      ([ NSLinkAttributeName : phoneNumber,
                     NSForegroundColorAttributeName : ,
                     NSUnderlineStyleAttributeName :  ],
                    range: )
    }
  }
}

The parameter types used to initialize NSDataDetector The type of type is NSTextCheckingTypes, which is actually UInt64. Multiple values ​​can be concatenated with or operators to enable the detection of multiple types of text simultaneously.

public typealias NSTextCheckingTypes = UInt64

The detection result attribute of NSTextCheckingResult is related to the type. For example, when the detection type is a URL (resultType == .link), the detected URL can be obtained through the url property.

Add an underscore to NSMutableAttributedString. The value corresponding to NSUnderlineStyleAttributeName can be Int in Swift, but not NSUnderlineStyle. So write. WriteThis will cause NSMutableAttributedString to not be displayed.

The above is all the content of this article. I hope that the content of this article will help you study or work. I also hope to support me more!