IOS Zxing QRcode 教學

使用 Xzing Library 寫一個簡單的 QRcode 掃瞄器

先至 Xzing 下載最新版的 Library

https://code.google.com/p/zxing/

寫本篇文章時 

Xcode Version : 4.6.1

Zxing Version : 2.1

先建立一個Single View Application Project



本專案只實作iPhone Device



專案建立完成後將下載下來的 Zxing-2.1 解壓縮後找到裡面的 iphone 跟 cpp 資料夾



複製到剛剛建的專案目錄下



接著將專案目錄下的 iphone/ZXingWidget/ZXingWidget.xcodeproj



拖拉至剛剛建的 Project 專案下面



接著是專案內 Build 的設定

點選 ZXingWidget.xcodeproj 至 TARGETS Build Settings 下的 Other Warning Flags

加入一條 -Wno-unused-private-field 

(解決錯誤訊息 private field 'cached_y_' is not used ...等的問題)



點選專案至 Targets Build Settings 下的 Header Search Paths

加入 iphone/ZXingWidget/Classes     recursive

跟 cpp/core/src    non-recursive



至 Targets Build Settings 下的 C++ Standard Library 改為 Compiler Default

(解決錯誤訊息 apple mach o linker error ...等的問題)

 

至 Targets Build Phases 下加入一個 Target Dependencies

ZxingWidget (ZxingWidget)

至 Targets Build Phases 下加入六個 Link Binary Libraries

libZxingWidget.a
AudioToolbox.framework
AVFoundation.framework
CoreMedia.framework
CoreVideo.framework
libiconv.dylib



最後將 ViewController.m 檔名改為 ViewController.mm

(解決錯誤訊息 iostream file not found ...等的問題)



最後為 ViewController.h 跟 ViewController.mm 內的 Code

ViewController.h

#import <UIKit/UIKit.h>
#import "ZXingWidgetController.h"
@interface ViewController : UIViewController<zxingdelegate>
    -(IBAction)scanButton:(id)sender;
@end

ViewController.mm

#import "ViewController.h"

#ifndef ZXQR
#define ZXQR 1
#endif

#if ZXQR
#import "QRCodeReader.h"
#endif

#ifndef ZXAZ
#define ZXAZ 0
#endif

#if ZXAZ
#import "AztecReader.h"
#endif

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
 // Do any additional setup after loading the view, typically from a nib.
    UIButton *scan_button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [scan_button setFrame:CGRectMake(0, 0, 320, 50)];
    [scan_button setTitle:@"scan" forState:UIControlStateNormal];
    [scan_button addTarget:self action:@selector(scanButton:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:scan_button];
}

-(IBAction)scanButton:(id)sender{
    ZXingWidgetController *widController = [[ZXingWidgetController alloc] initWithDelegate:self showCancel:YES OneDMode:NO];
    
    NSMutableSet *readers = [[NSMutableSet alloc ] init];
    
#if ZXQR
    QRCodeReader* qrcodeReader = [[QRCodeReader alloc] init];
    [readers addObject:qrcodeReader];
    [qrcodeReader release];
#endif
    
#if ZXAZ
    AztecReader *aztecReader = [[AztecReader alloc] init];
    [readers addObject:aztecReader];
    [aztecReader release];
#endif
    
    
    widController.readers = readers;
    [readers release];
    
    [self presentModalViewController:widController animated:YES];
    [widController release];
}

#pragma mark -
#pragma mark ZXingDelegateMethods

- (void)zxingController:(ZXingWidgetController*)controller didScanResult:(NSString *)result {
    [self dismissModalViewControllerAnimated:NO];
    NSLog(@"%@",result);
}

- (void)zxingControllerDidCancel:(ZXingWidgetController*)controller {
    [self dismissModalViewControllerAnimated:YES];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

在設備上的結果



按下 Button 後會開啟掃描畫面



掃描 QRcode 後會執行 NSLog(@"%@",result);

沒意外的話 All Output 會將結果顯示出來



END.