IOS下用Zbar实现摄像头扫描二维码和扫描本地相册二维码

1、首先下载ZbarSDk，这里不再赘余。唯一提醒的一点事找支持arm64的版本的sdk

2、话不多说，直接贴代码：

ScanViewController.h

 #import <UIKit/UIKit.h>
 #import "ZBarSDK.h"
 #import <Cordova/CDVPlugin.h>
 #import <Cordova/CDVViewController.h>

 @interface ScanViewController : CDVViewController<ZBarReaderDelegate,UIImagePickerControllerDelegate,UINavigationControllerDelegate,UIAlertViewDelegate>

 @property (nonatomic,strong) CDVInvokedUrlCommand* command;
 @property (nonatomic,strong) CDVPlugin* scanPlugin;
 @property (nonatomic,assign) int scanType;
 @property (nonatomic,strong) UIImagePickerController* imagePickerController;

 - (void) scan2D;

 @end

ScanViewController.m

 #import "ScanViewController.h"

 @interface ScanViewController ()

 @end

 @implementation ScanViewController

 @synthesize command,scanPlugin,scanType,imagePickerController;

 - (void)viewDidLoad {
     [super viewDidLoad];
 }

 - (void)didReceiveMemoryWarning {
     [super didReceiveMemoryWarning];
 }

 - (void) scan2D
 {

     UIAlertView* imageAlertView = [[UIAlertView alloc]initWithTitle:@"扫描方式" message:@"" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"相机",@"相册选取", nil nil];
     [imageAlertView show];
 }

 /*
  * 选择框点击事件
  */
 -(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
 {
     //NSLog(@"buttonIndex is : %li",(long)buttonIndex);
     switch (buttonIndex) {
         case 0:{

         }break;
         case 1:{
             [self scan2DByCamera];
             scanType = 1;
         }break;
         case 2:{
             [self scan2DByPhoto];
             scanType = 2;
         }break;
         default:
             break;
     }
 }


 -(void) scan2DByCamera
 {
     ZBarReaderViewController * reader = [[ZBarReaderViewController alloc] init];

     reader.readerDelegate = self;

     //非全屏
     reader.wantsFullScreenLayout = NO;

     //隐藏底部控制按钮
     reader.showsZBarControls = YES;

     //设置自己定义的界面
     [self setOverlayPickerView:reader];

     ZBarImageScanner * scanner = reader.scanner;
     [scanner setSymbology:ZBAR_I25 config:ZBAR_CFG_ENABLE to:0];

     reader.sourceType = UIImagePickerControllerSourceTypeCamera;
     reader.showsZBarControls = YES;

     //reader.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;

     [self presentViewController:reader animated:YES completion:nil];

 }

 -(void) scan2DByPhoto
 {
     if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])
     {
         imagePickerController = [[UIImagePickerController alloc]init];
         imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
         imagePickerController.delegate = self;
         [self.view addSubview: imagePickerController.view];

     }else{
         NSLog(@"相册不能用。。。");
     }

 }


 -(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
 {

     CDVPluginResult* pluginResult = nil;

     if (scanType == 1) {
         id<NSFastEnumeration> results = [info objectForKey:ZBarReaderControllerResults];
         ZBarSymbol * symbol;
         for(symbol in results)
             break;

         //_imageView.image = [info objectForKey:UIImagePickerControllerOriginalImage];

         //NSLog(@"扫描到的二维码:%@",symbol.data);


         pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK messageAsString:symbol.data];

     }else if(scanType == 2){

         UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];

         ZBarReaderController* read = [ZBarReaderController new];

         read.readerDelegate = self;

         CGImageRef cgImageRef = image.CGImage;

         ZBarSymbol* symbol = nil;

         for(symbol in [read scanImage:cgImageRef])
             break;

         pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK messageAsString:symbol.data];


     }

     [scanPlugin.commandDelegate sendPluginResult:pluginResult callbackId:command.callbackId];

     [picker dismissViewControllerAnimated:YES completion:nil];
     [self.view removeFromSuperview];
     [self removeFromParentViewController];

     //_label.text = symbol.data;
 }

 - (void)setOverlayPickerView:(ZBarReaderViewController *)reader

 {

     //清除原有控件

     for (UIView *temp in [reader.view subviews]) {

         for (UIButton *button in [temp subviews]) {

             if ([button isKindOfClass:[UIButton class]]) {

                 [button removeFromSuperview];

             }

         }

         for (UIToolbar *toolbar in [temp subviews]) {

             if ([toolbar isKindOfClass:[UIToolbar class]]) {

                 [toolbar setHidden:YES];

                 [toolbar removeFromSuperview];

             }

         }

     }

     //画中间的基准线

     //UIView* line = [[UIView alloc] initWithFrame:CGRectMake(40, 220, 240, 1)];

     //line.backgroundColor = [UIColor redColor];

     //[reader.view addSubview:line];



     //最上部view

     UIView* upView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 80)];

     upView.alpha = 0.3;

     upView.backgroundColor = [UIColor blackColor];

     [reader.view addSubview:upView];

     //用于说明的label

     UILabel * labIntroudction= [[UILabel alloc] init];

     labIntroudction.backgroundColor = [UIColor clearColor];

     labIntroudction.frame=CGRectMake(15, 20, 290, 50);

     labIntroudction.numberOfLines=2;

     labIntroudction.textColor=[UIColor whiteColor];

     labIntroudction.text=@"将二维码图像置于矩形方框内，离手机摄像头10CM左右，系统会自动识别。";

     [upView addSubview:labIntroudction];



     //左侧的view

     UIView *leftView = [[UIView alloc] initWithFrame:CGRectMake(0, 80, 20, 280)];

     leftView.alpha = 0.3;

     leftView.backgroundColor = [UIColor blackColor];

     [reader.view addSubview:leftView];


     //右侧的view

     UIView *rightView = [[UIView alloc] initWithFrame:CGRectMake(300, 80, 20, 280)];

     rightView.alpha = 0.3;

     rightView.backgroundColor = [UIColor blackColor];

     [reader.view addSubview:rightView];


     //底部view

     UIView * downView = [[UIView alloc] initWithFrame:CGRectMake(0, 360, 320, 160)];

     downView.alpha = 0.3;

     downView.backgroundColor = [UIColor blackColor];

     [reader.view addSubview:downView];


     //用于取消操作的button

     UIButton *cancelButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];

     cancelButton.alpha = 0.4;

     [cancelButton setFrame:CGRectMake(20, 390, 280, 40)];

     [cancelButton setTitle:@"取消" forState:UIControlStateNormal];

     [cancelButton.titleLabel setFont:[UIFont boldSystemFontOfSize:20]];

     [cancelButton addTarget:self action:@selector(dismissOverlayView:)forControlEvents:UIControlEventTouchUpInside];

     [reader.view addSubview:cancelButton];

 }

 //取消button方法

 - (void)dismissOverlayView:(id)sender{

     [self dismissViewControllerAnimated:YES completion:nil];
     [self.view removeFromSuperview];
     [self removeFromParentViewController];
 }

 //取消选择相片
 -(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{

     if (nil != imagePickerController) {
         [imagePickerController.view removeFromSuperview];
     }
 }

 @end