Text search

Foxit PDF SDK for iOS provides in-document text search via Core SDK, returning page index, character range, rectangles, and related match data.

UI Extensions built-in search

With the full reader (UI Extensions), users open the search panel from the toolbar for keywords, highlights, and navigation—no extra code required.

Core class

Class	Description
FSTextSearch	Text search engine; construct from FSPDFDoc

Search flag constants

Constant	Description
FSTextSearchSearchNormal	Default; case-insensitive
FSTextSearchSearchMatchCase	Case-sensitive
FSTextSearchSearchMatchWholeWord	Whole word
FSTextSearchSearchConsecutive	Consecutive search

Example: search in a document

#import <FoxitRDK/FSPDFObjC.h>

FSPDFDoc *doc = [[FSPDFDoc alloc] initWithPath:@"path/to/Sample.pdf"];
[doc load:nil];

FSTextSearch *textSearch = [[FSTextSearch alloc] initWithDocument:doc
                                                          cancel:nil
                                                           flags:FSTextPageParseTextNormal];
[textSearch setStartPage:0];
[textSearch setEndPage:[doc getPageCount] - 1];
[textSearch setPattern:@"foxit"];
[textSearch setSearchFlags:FSTextSearchSearchMatchCase];

while ([textSearch findNext]) {
    int pageIndex = [textSearch getMatchPageIndex];
    int startChar = [textSearch getMatchStartCharIndex];
    int endChar = [textSearch getMatchEndCharIndex];
    FSRectFArray *rects = [textSearch getMatchRects];
    NSString *sentence = [textSearch getMatchSentence];

    NSLog(@"在第 %d 页找到匹配，字符范围: %d-%d", pageIndex, startChar, endChar);
}

Open search in UI Extensions

[extensionsManager showSearchBar:YES];

API reference

See the API reference for FSTextSearch.