IOS9 new features searchable search

Code needs to run on iOS9 or later

Need to increase the system version of the judgment

#pragma  mark - searchable search + (void) addsearchableitem{         cssearchableitemattributeset *attributeset = [[cssearchableitemattributeset alloc]  initwithitemcontenttype:@ "Duwu. Topic.test "];    attributeset.title = @" title ";     attributeset.contentdescription = @ "content";     //tried to pass the URL in   seems to be a picture that does not show the network /    attributeset.thumbnailurl = [nsurl urlwithstring:@ "ImageURL"];         attributeset.keywords = @[@ "Can", @ "Add", @ "multiple", @ "keywords"];     //because I have no local image to display   and add to searchable search as if not much real-time   I took a sub-thread to download pictures and other images downloaded in the Add to the search bar method      dispatch_async (Dispatch_get_global_queue (0, 0), ^{                 nsdata *_thumbnaildata =  [[nsdata alloc] initwithcontentsofurl:attributeset.thumbnailurl];         attributeSet.thumbnailData = _thumbnailData;                 cssearchableitem *_item = [[ cssearchableitem alloc] initwithuniqueidentifier:@ "A special ID that makes it easy for users to click into the app and treat it differently"  domainidentifier:@ "Group Info"  attributeSet:attributeSet];                 //Delete a grouped searchable search         [[ cssearchableindex defaultsearchableindex] deletesearchableitemswithdomainidentifiers:@[@ "group Information"]  completionhandler:^ (Nserror * _nullable error)  {         }];                 //add information to searchable search    &nbsP;    [[cssearchableindex defaultsearchableindex] indexsearchableitems:@[_item]  completionhandler:^ (Nserror * _nullable error)  {         }];            });     }

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IOS9 new features searchable search