I'm creating an iphone app using swift 2. I got the app to be able to read barcodes and display the barcode. Also I learned core data and using it to import a .csv file with a bunch of product information which includes the barcode. Now when a barcode is scanned, I want it to search through the file and display the information relating to it. Here are parts of my code, how will I go about doing this? To be honest, I have programmers block right now and had for the past two days. Any help or guidance will be appreciated.
Here is the CSV Parser:
func parseCSV (contentsOfURL: NSURL, encoding: NSStringEncoding) -> [(title:String, price:String, weight:String, box_length:String, box_width:String, box_height:String, sku:String, barcodeNum:String )]? {
// Load the CSV file and parse it
let delimiter = ","
var items:[(title:String, price:String, weight:String, box_length:String, box_width:String, box_height:String, sku:String, barcodeNum:String )]?
do {
let content = try String(contentsOfURL: contentsOfURL, encoding: encoding)
print(content)
items = []
let lines:[String] = content.componentsSeparatedByCharactersInSet(NSCharacterSet.newlineCharacterSet()) as [String]
for line in lines {
var values:[String] = []
if line != "" {
// For a line with double quotes
// we use NSScanner to perform the parsing
if line.rangeOfString("\"") != nil {
var textToScan:String = line
var value:NSString?
var textScanner:NSScanner = NSScanner(string: textToScan)
while textScanner.string != "" {
if (textScanner.string as NSString).substringToIndex(1) == "\"" {
textScanner.scanLocation += 1
textScanner.scanUpToString("\"", intoString: &value)
textScanner.scanLocation += 1
} else {
textScanner.scanUpToString(delimiter, intoString: &value)
}
// Store the value into the values array
values.append(value as! String)
// Retrieve the unscanned remainder of the string
if textScanner.scanLocation < textScanner.string.characters.count {
textToScan = (textScanner.string as NSString).substringFromIndex(textScanner.scanLocation + 1)
} else {
textToScan = ""
}
textScanner = NSScanner(string: textToScan)
}
// For a line without double quotes, we can simply separate the string
// by using the delimiter (e.g. comma)
} else {
values = line.componentsSeparatedByString(delimiter)
}
// Put the values into the tuple and add it to the items array
//(title:String, price:String, weight:String, box_length:String, box_width:String, box_height:String, sku:String, barcodeNum:String )
let item = (title: values[0], sku: values[1], price: values[2], weight: values[3], box_length: values[4], box_width: values[5], box_height: values[6], barcodeNum: values[7])
items?.append(item)
}
}
} catch {
print(error)
}
return items
}
When Barcode is detected:
func barcodeDetected(code: String) {
print(code)
if(barcodeDelegate != nil){
barcodeDelegate!.barcodeFound(code)
}
// Let the user know we've found something.
let alert = UIAlertController(title: "Found a Barcode!", message: code, preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "Search", style: UIAlertActionStyle.Destructive, handler: { action in
// Remove the spaces.
let trimmedCode = code.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceCharacterSet())
// EAN or UPC?
// Check for added "0" at beginning of code.
let trimmedCodeString = "\(trimmedCode)"
var trimmedCodeNoZero: String
if trimmedCodeString.hasPrefix("0") && trimmedCodeString.characters.count > 1 {
trimmedCodeNoZero = String(trimmedCodeString.characters.dropFirst())
// Send the doctored UPC to DataService.searchAPI()
DataService.searchCode(trimmedCodeNoZero)
} else {
// Send the doctored EAN to DataService.searchAPI()
DataService.searchCode(trimmedCodeString)
}
self.navigationController?.popViewControllerAnimated(true)
}))
self.presentViewController(alert, animated: true, completion: nil)
}
Dataservice.swift file
import Foundation
class DataService {
static let dataService = DataService()
static func searchCode(codeNumber: String) {
}
}
I can post more of my project if it helps, but I feel like this is already too much information, anything will help at this point on how to tackle this.
