二维码扫描

1.制作扫描框

#define ScannerHeight           200
#define ScannerWidth            200

#define SCREENWIDTH            [UIScreen mainScreen].bounds.size.width
#define AppScreenheight        ([UIScreen mainScreen].bounds.size.height-64)

#import "YscanView.h"

@implementation YscanView
-(id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        [self setOverlayPickerView];
        self.backgroundColor = [UIColor clearColor];
    }
    return self;
}
- (void)setOverlayPickerView
{
    CGFloat viewalpha =0.4;
    UIColor *mycolor=[UIColor blackColor];
    
    UIView* upView = [[UIView alloc] initWithFrame:CGRectMake(0, 0,SCREENWIDTH,AppScreenheight/2-ScannerHeight/2-20)];
    upView.alpha = viewalpha;
    upView.backgroundColor = mycolor;
    [self addSubview:upView];
    
    UIView *leftView = [[UIView alloc] initWithFrame:CGRectMake(0,upView.frame.size.height,SCREENWIDTH/2-ScannerWidth/2,ScannerHeight)];
    leftView.alpha = viewalpha;
    leftView.backgroundColor = mycolor;
    [self addSubview:leftView];
    
    UIView *rightView = [[UIView alloc] initWithFrame:CGRectMake(leftView.frame.size.width+ScannerWidth,leftView.frame.origin.y,SCREENWIDTH-(leftView.frame.size.width+ScannerWidth), ScannerHeight)];
    rightView.alpha = viewalpha;
    rightView.backgroundColor = mycolor;
    [self addSubview:rightView];
    
    CGFloat downViewY = ScannerHeight+upView.frame.size.height;
    CGFloat downViewH = AppScreenheight-(ScannerHeight+upView.frame.size.height);
    UIView * downView = [[UIView alloc] initWithFrame:CGRectMake(0,downViewY,SCREENWIDTH,downViewH)];
    downView.alpha = viewalpha;
    downView.backgroundColor = mycolor;
    [self addSubview:downView];
    
    imageView=[[UIImageView alloc] initWithFrame:CGRectMake(CGRectGetMaxX(leftView.frame), upView.frame.size.height, ScannerWidth, ScannerWidth)];
    imageView.image=[UIImage imageNamed:@"SaoMiaoKuang"];
    imageView.layer.opacity=1;
    imageView.backgroundColor=[UIColor clearColor];
    [self addSubview:imageView];
    
    CGRect qrCodeLineframe=CGRectZero;
    qrCodeLineframe=CGRectMake(CGRectGetMinX(imageView.frame),CGRectGetMinY(imageView.frame),ScannerWidth,11);
    qrCodeLine = [[UIImageView alloc] initWithFrame:qrCodeLineframe];
    qrCodeLine.image=[UIImage imageNamed:@"SaoMiaoLine"];
    [self addSubview:qrCodeLine];
    
    UILabel *label=[[UILabel alloc] initWithFrame:CGRectMake(CGRectGetMinX(imageView.frame)-5,imageView.frame.size.height+imageView.frame.origin.y+20,ScannerWidth+10, 20)];
    label.text=@"对准二维码到框内即可自动扫描";
    label.font=[UIFont systemFontOfSize:15];
    label.backgroundColor=[UIColor clearColor];
    [self addSubview:label];
}
#pragma mark ====
-(void) stopTimer
{
    if ([_mytimer isValid]==YES) {
        [_mytimer invalidate];
        _mytimer =nil;
    }
}
- (void)createTimer
{
    _mytimer=[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(moveUpAndDownLine) userInfo:nil repeats:YES];
}
- (void)moveUpAndDownLine
{
    CGFloat Y = qrCodeLine.frame.origin.y;
    CGFloat qrCodeLineX =qrCodeLine.frame.origin.x;
    if (CGRectGetMinY(imageView.frame)==Y){
        [UIView beginAnimations:@"asa" context:nil];
        [UIView setAnimationDuration:1];
        qrCodeLine.frame=CGRectMake(qrCodeLineX,CGRectGetMaxY(imageView.frame)-11,ScannerWidth,11);
        [UIView commitAnimations];
    }else if(CGRectGetMaxY(imageView.frame)-11==Y){
        [UIView beginAnimations:@"asa" context:nil];
        [UIView setAnimationDuration:1];
        qrCodeLine.frame=CGRectMake(qrCodeLineX,CGRectGetMinY(imageView.frame),ScannerWidth,11);
        [UIView commitAnimations];
    }
}
@end

2.判断iOS版本

if ([[UIDevice currentDevice].systemVersion integerValue]>=7.0) {
                            YsanViewController * rt = [[YsanViewController alloc]init];
                            rt.hidesBottomBarWhenPushed=YES;
                            self.navigationItem.backBarButtonItem=[[UIBarButtonItem alloc]initWithTitle:@"" style:UIBarButtonItemStyleBordered target:nil action:nil];
                            [self.navigationController pushViewController:rt animated:YES];
                        }
                        else
                        {
                            YzbarVC * myzbar =[[YzbarVC alloc]init];
                            myzbar.showsZBarControls = NO;
                            myzbar.hidesBottomBarWhenPushed=YES;
                            [self.navigationController pushViewController:myzbar animated:YES];
                        }

3.导入第三方库（ZBarSDK），并导入#import "ZBarReaderController.h"

#import "YsanViewController.h"
#import "WeizhanBrower.h"
#import "ZBarReaderController.h"

@interface YsanViewController ()<ZBarReaderDelegate，AVCaptureMetadataOutputObjectsDelegate>
@property (nonatomic,strong)AVCaptureDevice * capturedevice;
@property (strong,nonatomic)AVCaptureDeviceInput * deviceinput;
@property (strong,nonatomic)AVCaptureMetadataOutput * metadataoutput;
@property (strong,nonatomic)AVCaptureSession * capturesession;
@property (strong,nonatomic)AVCaptureVideoPreviewLayer * capturepreview;
@property (strong,nonatomic)UIView * viewPreview;
@property (strong,nonatomic)YscanView * ysanview;
@property (strong,nonatomic) WeizhanBrower * weizhanbrower;
@end

@implementation YsanViewController
@synthesize ysanview;
-(void)loadView
{
    [super loadView];
    UIButton * bac =[UIButton buttonWithType:UIButtonTypeSystem];
    bac.frame=CGRectMake(0, 4, 42, 40);
    [bac setTitle:@"相册" forState:UIControlStateNormal];
    [bac addTarget:self action:@selector(pickImageFromAlbum) forControlEvents:UIControlEventTouchUpInside];
    UIBarButtonItem * bacitem =[[UIBarButtonItem alloc]initWithCustomView:bac];
    self.navigationItem.rightBarButtonItem=bacitem;
    self.view.backgroundColor=[UIColor blackColor];
    
    ysanview =[[YscanView alloc]initWithFrame:CGRectMake(0, 0,[UIScreen mainScreen].applicationFrame.size.width, [UIScreen mainScreen].applicationFrame.size.height)];
    [self initScanUI];
    [self.view addSubview:ysanview];
}
- (void)viewDidLoad
{
    [super viewDidLoad];
}
-(void)pickImageFromAlbum
{
    ZBarReaderController *reader = [ZBarReaderController new];
    reader.readerDelegate = self;
    reader.showsHelpOnFail = NO;
    reader.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    ZBarImageScanner *myscanner = reader.scanner;
    [myscanner setSymbology: ZBAR_QRCODE
                     config: ZBAR_CFG_ENABLE
                         to: 1];
    [self presentViewController:reader animated:YES completion:nil];
}

-(void)viewWillAppear:(BOOL)animated
{
    [_capturesession startRunning];
    [ysanview createTimer];
}
-(void)viewWillDisappear:(BOOL)animated
{
    self.view=nil;
    [self stopQRCodeReading];
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}
-(void)initScanUI
{
    _capturedevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
    
    NSError *error = nil;
    _deviceinput =[AVCaptureDeviceInput deviceInputWithDevice:_capturedevice error:&error];
    if (error)
    {
        NSLog(@"-%@", error.localizedDescription);
        return;
    }
    
    _metadataoutput=[[AVCaptureMetadataOutput alloc]init];
    [_metadataoutput setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];
    
    _capturesession=[[AVCaptureSession alloc]init];
    if ([self checkDevice:@"iPad"])
    {
        [_capturesession setSessionPreset:AVCaptureSessionPreset640x480];
    }
    else
    {
        [_capturesession setSessionPreset:AVCaptureSessionPresetHigh];
    }
    [_capturesession addInput:_deviceinput];
    [_capturesession addOutput:_metadataoutput];
    
    _metadataoutput.metadataObjectTypes =@[AVMetadataObjectTypeQRCode];
    
    _capturepreview =[[AVCaptureVideoPreviewLayer alloc]initWithSession:_capturesession];
    [_capturepreview setVideoGravity:AVLayerVideoGravityResizeAspectFill];
    _capturepreview.frame =self.view.layer.bounds;
    [self.view.layer insertSublayer:_capturepreview atIndex:0];
}
-(BOOL)checkDevice:(NSString*)name
{
    NSString* deviceType = [UIDevice currentDevice].model;
    NSRange range = [deviceType rangeOfString:name];
    return range.location != NSNotFound;
}
- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection
{
    NSString *stringValue;
    if ([metadataObjects count] >0)
    {
        [self stopQRCodeReading];
        AVMetadataMachineReadableCodeObject * metadataObject = [metadataObjects objectAtIndex:0];
        stringValue = metadataObject.stringValue;
        [self CreatWeizhanBrower:stringValue];
        self.navigationItem.backBarButtonItem=[[UIBarButtonItem alloc]initWithTitle:@"" style:UIBarButtonItemStyleBordered target:nil action:nil];
        [self.navigationController pushViewController:_weizhanbrower animated:YES];
    }
}
-(void)CreatWeizhanBrower:(NSString *)Url
{
    _weizhanbrower =[[WeizhanBrower alloc]init];
    _weizhanbrower.URLstr=Url;
}
- (void)stopQRCodeReading
{
    [_capturesession stopRunning];
    [_capturepreview removeFromSuperlayer];
    [ysanview stopTimer];
    [ysanview removeFromSuperview];
}
#pragma mark ===imagePickerDelegate
-(void)imagePickerController:(UIImagePickerController*)reader didFinishPickingMediaWithInfo:(NSDictionary*) info
{
    id<NSFastEnumeration> results =[info objectForKey: ZBarReaderControllerResults];
    ZBarSymbol *symbol = nil;
    for(symbol in results)
        break;
    
    [reader dismissViewControllerAnimated:NO  completion:nil];
    
    [self CreatWeizhanBrower:symbol.data];
    self.navigationItem.backBarButtonItem=[[UIBarButtonItem alloc]initWithTitle:@"" style:UIBarButtonItemStyleBordered target:nil action:nil];
    [self.navigationController pushViewController:_weizhanbrower animated:YES];
}
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
    [picker dismissViewControllerAnimated:YES completion:nil];
}
#pragma mark ==== ZBarReaderControllerDelegate
- (void)readerControllerDidFailToRead: (ZBarReaderController*)reader withRetry: (BOOL)retry
{
    if(retry)
    {
        UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"" message:@"您选择的二维码不正确,请重新选择" delegate:self cancelButtonTitle:nil otherButtonTitles:@"确定", nil];
        [alert show];
        if(![self.parentViewController isBeingDismissed]){
            [self dismissViewControllerAnimated:YES completion:nil];
        }
    }
    else
    {
        [reader dismissViewControllerAnimated:YES completion:nil];
    }
}

@end

 

#import "YzbarVC.h"
#import <AVFoundation/AVFoundation.h>

@implementation YzbarVC
-(void)viewDidLoad
{
    [super viewDidLoad];
    [self CreatzBarVC];
}
-(void)CreatzBarVC
{
    self.readerDelegate = self;
    self.wantsFullScreenLayout=NO;
    self.supportedOrientationsMask = ZBarOrientationMaskAll;
    ZBarImageScanner *myscanner = self.scanner;
    self.videoQuality=UIImagePickerControllerQualityTypeHigh;
    [myscanner setSymbology: ZBAR_I25
                   config: ZBAR_CFG_ENABLE
                       to: 0];
    
    UIButton * bac =[UIButton buttonWithType:UIButtonTypeSystem];
    bac.frame=CGRectMake(0, 4, 42, 40);
    [bac setTitle:@"相册" forState:UIControlStateNormal];
    [bac addTarget:self action:@selector(pickImageFromAlbum) forControlEvents:UIControlEventTouchUpInside];
    UIBarButtonItem * bacitem =[[UIBarButtonItem alloc]initWithCustomView:bac];
    self.navigationItem.rightBarButtonItem=bacitem;
    ysanview =[[YscanView alloc]initWithFrame:CGRectMake(0, 0,[UIScreen mainScreen].applicationFrame.size.width, [UIScreen mainScreen].applicationFrame.size.height)];
    [self.view addSubview:ysanview];
    [ysanview createTimer];
}
-(void)pickImageFromAlbum
{
    ZBarReaderController *reader = [ZBarReaderController new];
    reader.readerDelegate = self;
    reader.showsHelpOnFail = NO;
    reader.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    ZBarImageScanner *myscanner = reader.scanner;
    [myscanner setSymbology: ZBAR_QRCODE
                   config: ZBAR_CFG_ENABLE
                       to: 1];
    [self presentViewController:reader animated:YES completion:nil];
}
-(void)loadMultifunctionView:(UIView *)view
{
     UIButton *cancelButton = [UIButton buttonWithType:UIButtonTypeCustom];
    //[cancelButton setFrame:CGRectMake(0, [UIScreen mainScreen].bounds.size.height-100,SCREENWIDTH, 40)];
    [cancelButton setTitle:@"我的二维码" forState:UIControlStateNormal];
    [cancelButton setTitleEdgeInsets:UIEdgeInsetsMake(0, 5, 0, 0)];
    [cancelButton.titleLabel setFont:[UIFont boldSystemFontOfSize:20]];
//    [cancelButton addTarget:self action:@selector(dismissOverlayView:)forControlEvents:UIControlEventTouchUpInside];
    cancelButton.backgroundColor=[UIColor clearColor];
    [cancelButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [view addSubview:cancelButton];
}

-(void)CreatWeizhanBrower:(ZBarSymbol *)symbol
{
    weizhanbrower =[[WeizhanBrower alloc]init];
    weizhanbrower.URLstr=symbol.data;
}
#pragma mark ===imagePickerDelegate
-(void)imagePickerController:(UIImagePickerController*)reader didFinishPickingMediaWithInfo:(NSDictionary*) info
{
    id<NSFastEnumeration> results =[info objectForKey: ZBarReaderControllerResults];
    ZBarSymbol *symbol = nil;
    for(symbol in results)
        break;
    
    [reader dismissViewControllerAnimated:NO  completion:nil];
    
    [self CreatWeizhanBrower:symbol];
    self.navigationItem.backBarButtonItem=[[UIBarButtonItem alloc]initWithTitle:@"" style:UIBarButtonItemStyleBordered target:nil action:nil];
    [self.navigationController pushViewController:weizhanbrower animated:YES];
}
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
    [picker dismissViewControllerAnimated:YES completion:nil];
}
#pragma mark ==== ZBarReaderControllerDelegate
- (void)readerControllerDidFailToRead: (ZBarReaderController*)reader withRetry: (BOOL)retry
{
    if(retry)
    {
        UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"" message:@"您选择的二维码不正确,请重新选择" delegate:self cancelButtonTitle:nil otherButtonTitles:@"确定", nil];
        [alert show];
        if(![self.parentViewController isBeingDismissed]){
            [self dismissViewControllerAnimated:YES completion:nil];
        }
    }
    else
    {
        [reader dismissViewControllerAnimated:YES completion:nil];
    }
}
@end