findString(_:fromSelection:withOptions:)
Synchronously finds the next occurance of a string after the specified selection (or before the selection if you specified NSBackwardsSearch as a search option.
Declaration
func findString(_ string: String, fromSelection selection: PDFSelection?, withOptions options: NSString.CompareOptions = []) -> PDFSelection?Discussion
Matches are returned as a PDFSelection object. If the search reaches the end (or beginning) of the document without any hits, this method returns NULL.
If you pass NULL for the selection, this method begins searching from the beginning of the document (or the end, if you specified NSBackwardsSearch).
You can use this method to implement “Find Again” behavior. For options, refer to Searching, Comparing, and Sorting Strings.