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책에 관한 앱을 만들고 있습니다. 응용 프로그램에서 , 내가 2 개 클래스팝업보기 컨트롤러 후 데이터를 신속하게 전달하는 방법
있다 ISBN (바코드)를 얻어서 응용 프로그램 자동 충전 도서 정보를 만들고 싶어. 하나는 'UploadMain'이고 다른 하나는 'ScanView'입니다.
스캔으로 ISBN을 얻을 수 있는데 이지만 ScanView에서 UploadMain으로 데이터를 전달하는 데 문제가 있습니다.
은 ScanView에서 내가 무슨 문제가 내 코드를 모르는 UploadMain 클래스
override func viewDidLoad(){
super.viewDidLoad()
ISBN.delegate = self
}
override func viewWillAppear(animated: Bool){
ISBN.text = ISBNstring
}
에 대한
if let UploadVC = self.storyboard?.instantiateViewControllerWithIdentifier("UploadMain") as? UploadMain {
UploadVC.ISBNstring = self.detectionString!
}
아래 코드처럼 바인딩 옵션 사용했다.
전체 코드 의 UploadMain
import UIKit
import Foundation
class UploadMain: UIViewController,UITextFieldDelegate {
var ISBNstring: String = ""
var TitleString: String = ""
var AuthorString: String = ""
var PubString: String = ""
var PriceSting: String = ""
@IBOutlet weak var ISBN: UITextField!
@IBOutlet weak var bookTitle: UITextField!
@IBOutlet weak var bookAuthor: UITextField!
@IBOutlet weak var bookPub: UITextField!
@IBOutlet weak var bookPrice: UITextField!
override func viewDidLoad(){
super.viewDidLoad()
ISBN.delegate = self
}
override func viewWillAppear(animated: Bool){
ISBN.text = ISBNstring
}
@IBAction func Upload(sender: AnyObject) {
dismissViewControllerAnimated(true, completion: nil)
}
}
ScanView 클래스는 나에게
import UIKit
import AVFoundation
import Foundation
class ScanView : UIViewController, AVCaptureMetadataOutputObjectsDelegate {
let session : AVCaptureSession = AVCaptureSession()
var previewLayer : AVCaptureVideoPreviewLayer!
var detectionString : String!
let apiKey : String = "---------dddddd"
override func viewDidLoad() {
super.viewDidLoad()
// For the sake of discussion this is the camera
let device = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
// Create a nilable NSError to hand off to the next method.
// Make sure to use the "var" keyword and not "let"
var error : NSError? = nil
var input: AVCaptureDeviceInput = AVCaptureDeviceInput()
do {
input = try AVCaptureDeviceInput(device: device) as AVCaptureDeviceInput
} catch let myJSONError {
print(myJSONError)
}
// If our input is not nil then add it to the session, otherwise we're kind of done!
if input != AVCaptureDeviceInput() {
session.addInput(input)
}
else {
// This is fine for a demo, do something real with this in your app. :)
print(error)
}
let output = AVCaptureMetadataOutput()
output.setMetadataObjectsDelegate(self, queue: dispatch_get_main_queue())
session.addOutput(output)
output.metadataObjectTypes = output.availableMetadataObjectTypes
previewLayer = AVCaptureVideoPreviewLayer(session: session)
previewLayer.frame = self.view.bounds
previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
self.view.layer.addSublayer(previewLayer)
// Start the scanner. You'll have to end it yourself later.
session.startRunning()
}
// This is called when we find a known barcode type with the camera.
func captureOutput(captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [AnyObject]!, fromConnection connection: AVCaptureConnection!) {
var highlightViewRect = CGRectZero
var barCodeObject : AVMetadataObject!
let barCodeTypes = [AVMetadataObjectTypeEAN13Code, AVMetadataObjectTypeEAN8Code]
// The scanner is capable of capturing multiple 2-dimensional barcodes in one scan.
for metadata in metadataObjects {
for barcodeType in barCodeTypes {
if metadata.type == barcodeType {
barCodeObject = self.previewLayer.transformedMetadataObjectForMetadataObject(metadata as! AVMetadataMachineReadableCodeObject)
highlightViewRect = barCodeObject.bounds
detectionString = (metadata as! AVMetadataMachineReadableCodeObject).stringValue
self.session.stopRunning()
self.alert(detectionString)
// Daum Book API 호출
let apiURI = NSURL(string: "https://apis.daum.net/search/book?apikey=\(apiKey)&q=\(detectionString)&searchType=isbn&output=json")
let apidata : NSData? = NSData(contentsOfURL: apiURI!)
NSLog("API Result = %@", NSString(data: apidata!, encoding: NSUTF8StringEncoding)!)
**if let UploadVC = self.storyboard?.instantiateViewControllerWithIdentifier("UploadMain") as? UploadMain {
UploadVC.ISBNstring = self.detectionString!
}**
break
}
}
}
print(detectionString)
self.navigationController?.popViewControllerAnimated(true)
}
func alert(Code: String){
let actionSheet:UIAlertController = UIAlertController(title: "Barcode", message: "\(Code)", preferredStyle: UIAlertControllerStyle.Alert)
// for alert add .Alert instead of .Action Sheet
// start copy
let firstAlertAction:UIAlertAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler:
{
(alertAction:UIAlertAction!) in
// action when pressed
self.session.startRunning()
})
actionSheet.addAction(firstAlertAction)
}
}
'스토리 보드'에서 ScanView의 'segue'는 'button'으로 연결되어 있습니다. 맞습니까? –