i doing ios exercise , trying bar-code data stored in nsstring detectionstring , output tableview. have declared @property nsstring* detectionstring in tableview method not coming up
- (void)captureoutput:(avcaptureoutput *)captureoutput didoutputmetadataobjects:(nsarray *)metadataobjects fromconnection:(avcaptureconnection *)connection { cgrect highlightviewrect = cgrectzero; avmetadatamachinereadablecodeobject *barcodeobject; nsstring *detectionstring = nil; nsarray *barcodetypes = @[avmetadataobjecttypeupcecode, avmetadataobjecttypecode39code, avmetadataobjecttypecode39mod43code, avmetadataobjecttypeean13code, avmetadataobjecttypeean8code, avmetadataobjecttypecode93code, avmetadataobjecttypecode128code, avmetadataobjecttypepdf417code, avmetadataobjecttypeqrcode, avmetadataobjecttypeazteccode]; (avmetadataobject *metadata in metadataobjects) { (nsstring *type in barcodetypes) { if ([metadata.type isequaltostring:type]) { barcodeobject = (avmetadatamachinereadablecodeobject *)[_scanpreviewlayer transformedmetadataobjectformetadataobject:(avmetadatamachinereadablecodeobject *)metadata]; highlightviewrect = barcodeobject.bounds; **// string contains barcode data -->** self.detectionstring = [(avmetadatamachinereadablecodeobject *)metadata stringvalue]; break; } } // conditional statement test if barcode scanning if (detectionstring != nil) { _scanlabel.text = detectionstring; break; } else _scanlabel.text = @"nil"; } _scanlasercaptureview.frame = highlightviewrect; } - (nsstring *)detectionstring { **//stored string value, want appear on tableview method** return _detectionstring; }
once detection string reload table , cells pass detection string in cellforrowatindexpath.
