二维码扫描利用ZBar实现

上次是根据系统的属性自己封装的一个二维码扫描，这次给大家介绍一下基于ZBar集成的类似于QQ二维码扫描界面的二维码扫描的效果。

                                                               最下方配有效果图哦！

首先，需要引入ZBar第三方库文件：

ZBarSDK

libqrencode

其次，利用ZBar集成二维码扫描需要引入的类库有：

libiconv.tbd

QuartzCore.framework

CoreVideo.framework

CoreMedia.framework

AVFoundation.framework

代码实现：

-(void)createView{

//扫描页的背景图片

UIImageView*bgImageView;

if (self.view.frame.size.height<500) {

UIImage*image= [UIImage imageNamed:@"qrcode_scan_bg_Green.png"];

bgImageView=[[UIImageView alloc]initWithFrame:CGRectMake(0, 64, self.view.frame.size.width, self.view.frame.size.height-64-100)];

bgImageView.contentMode=UIViewContentModeTop;

bgImageView.clipsToBounds=YES;

bgImageView.image=image;

bgImageView.userInteractionEnabled=YES;

}else if(self.view.frame.size.height<600){

UIImage*image= [UIImage imageNamed:@"qrcode_scan_bg_Green_iphone5"];

bgImageView=[[UIImageView alloc]initWithFrame:CGRectMake(0, 64, self.view.frame.size.width, self.view.frame.size.height-64-100)];

bgImageView.contentMode=UIViewContentModeTop;

bgImageView.clipsToBounds=YES;

bgImageView.image=image;

bgImageView.userInteractionEnabled=YES;

}

else if(self.view.frame.size.height<680){

UIImage*image= [UIImage imageNamed:@"qrcode_scan_bg_Green_iphone6"];

bgImageView=[[UIImageView alloc]initWithFrame:CGRectMake(0, 64, self.view.frame.size.width, self.view.frame.size.height-64-100)];

bgImageView.contentMode=UIViewContentModeTop;

bgImageView.clipsToBounds=YES;

bgImageView.image=image;

bgImageView.userInteractionEnabled=YES;

}

else{

UIImage*image= [UIImage imageNamed:@"qrcode_scan_bg_Green_iphone6p"];

bgImageView=[[UIImageView alloc]initWithFrame:CGRectMake(0, 64, self.view.frame.size.width, self.view.frame.size.height-64-100)];

bgImageView.contentMode=UIViewContentModeTop;

bgImageView.clipsToBounds=YES;

bgImageView.image=image;

bgImageView.userInteractionEnabled=YES;

}

[self.view addSubview:bgImageView];

//扫描框下面的提示语

if (self.view.frame.size.height<600) {

UILabel * label = [[UILabel alloc] initWithFrame:CGRectMake(0, self.view.frame.size.height-200, self.view.frame.size.width, 40)];

label.text = @"将取景框对准二维码，即可自动扫描。";

label.font=[UIFont systemFontOfSize:12];

label.textColor = [UIColor whiteColor];

label.textAlignment = NSTextAlignmentCenter;

label.lineBreakMode = NSLineBreakByWordWrapping;

label.numberOfLines = 2;

label.backgroundColor = [UIColor clearColor];

[bgImageView addSubview:label];

}else{

UILabel * label = [[UILabel alloc] initWithFrame:CGRectMake(0, self.view.frame.size.height-300, self.view.frame.size.width, 40)];

label.text = @"将取景框对准二维码，即可自动扫描。";

label.font=[UIFont systemFontOfSize:17];

label.textColor = [UIColor whiteColor];

label.textAlignment = NSTextAlignmentCenter;

label.lineBreakMode = NSLineBreakByWordWrapping;

label.numberOfLines = 2;

label.backgroundColor = [UIColor clearColor];

[bgImageView addSubview:label];

}

//初始化扫描线

//4s/5/5s

if (self.view.frame.size.height<600) {

_line = [[UIImageView alloc] initWithFrame:CGRectMake(self.view.frame.size.width/5.8, 50, 220, 2)];

}

else{

//6/6s/6p

_line = [[UIImageView alloc] initWithFrame:CGRectMake(self.view.frame.size.width/4.6, 50, 220, 2)];

}

_line.image = [UIImage imageNamed:@"qrcode_scan_light_green.png"];

[bgImageView addSubview:_line];

//下方相册

UIImageView*scanImageView=[[UIImageView alloc]initWithFrame:CGRectMake(0, bgImageView.frame.size.height+64, self.view.frame.size.width, 100)];

scanImageView.image=[UIImage imageNamed:@"qrcode_scan_bar.png"];

scanImageView.userInteractionEnabled=YES;

[self.view addSubview:scanImageView];

NSArray*unSelectImageNames=@[@"qrcode_scan_btn_photo_nor.png",@"qrcode_scan_btn_flash_nor.png",@"qrcode_scan_btn_myqrcode_nor.png"];

NSArray*selectImageNames=@[@"qrcode_scan_btn_photo_down.png",@"qrcode_scan_btn_flash_down.png",@"qrcode_scan_btn_myqrcode_down.png"];

for (int i=0; i<unSelectImageNames.count; i++) {

UIButton*button=[UIButton buttonWithType:UIButtonTypeCustom];

[button setImage:[UIImage imageNamed:unSelectImageNames[i]] forState:UIControlStateNormal];

[button setImage:[UIImage imageNamed:selectImageNames[i]] forState:UIControlStateHighlighted];

button.frame=CGRectMake(self.view.frame.size.width/3*i, 0, self.view.frame.size.width/3, 100);

[scanImageView addSubview:button];

if (i==0) {

[button addTarget:self action:@selector(pressPhotoLibraryButton:) forControlEvents:UIControlEventTouchUpInside];

}

if (i==1) {

[button addTarget:self action:@selector(flashLightClick) forControlEvents:UIControlEventTouchUpInside];

}

if (i==2) {

button.hidden=YES;

}

}

//假导航

UIImageView*navImageView=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 64)];

navImageView.image=[UIImage imageNamed:@"qrcode_scan_bar.png"];

navImageView.userInteractionEnabled=YES;

[self.view addSubview:navImageView];

UILabel*titleLabel=[[UILabel alloc]initWithFrame:CGRectMake(self.view.frame.size.width/2-32,20 , 64, 44)];

titleLabel.textColor=[UIColor whiteColor];

titleLabel.text=@"扫一扫";

[navImageView addSubview:titleLabel];

//返回按钮

UIButton*button = [UIButton buttonWithType:UIButtonTypeCustom];

[button setImage:[UIImage imageNamed:@"qrcode_scan_titlebar_back_pressed@2x.png"] forState:UIControlStateHighlighted];

[button setImage:[UIImage imageNamed:@"qrcode_scan_titlebar_back_nor.png"] forState:UIControlStateNormal];

[button setFrame:CGRectMake(10,15, 48, 48)];

[button addTarget:self action:@selector(pressCancelButton:) forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:button];

timer = [NSTimer scheduledTimerWithTimeInterval:2 target:self selector:@selector(animation1) userInfo:nil repeats:YES];

}

//扫描线的动画效果

-(void)animation1

{

[UIView animateWithDuration:2 animations:^{

if (self.view.frame.size.height<600) {

_line.frame = CGRectMake(self.view.frame.size.width/5.8, self.view.frame.size.height/43*22, 220, 2);

}else{

_line.frame = CGRectMake(self.view.frame.size.width/4.6, self.view.frame.size.height/43*22, 220, 2);

}

}completion:^(BOOL finished) {

[UIView animateWithDuration:2 animations:^{

if (self.view.frame.size.height<600) {

_line.frame = CGRectMake(self.view.frame.size.width/5.8, 50, 220, 2);

}

else{

_line.frame = CGRectMake(self.view.frame.size.width/5.8, 50, 220, 2);

}

}];

}];

}

//开启关闭闪光灯

-(void)flashLightClick{

AVCaptureDevice * device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

if (device.torchMode==AVCaptureTorchModeOff) {

//闪光灯开启

[device lockForConfiguration:nil];

[device setTorchMode:AVCaptureTorchModeOn];

}else {

//闪光灯关闭

[device setTorchMode:AVCaptureTorchModeOff];

}

}

- (void)viewDidLoad

{

//相机界面的定制在self.view上加载即可

BOOL Custom= [UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera];//判断摄像头是否能用

if (Custom) {

[self initCapture];//启动摄像头

}

[self createView];

[super viewDidLoad];

}

#pragma mark 选择相册

- (void)pressPhotoLibraryButton:(UIButton *)button

{  if (timer) {

[timer invalidate];

timer=nil;

}

_line.frame = CGRectMake(50, 50, 220, 2);

num = 0;

upOrdown = NO;

UIImagePickerController *picker = [[UIImagePickerController alloc] init];

picker.allowsEditing = YES;

picker.delegate = self;

picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

[self presentViewController:picker animated:YES completion:^{

self.isScanning = NO;

[self.captureSession stopRunning];

}];

}

#pragma mark 点击取消

- (void)pressCancelButton:(UIButton *)button

{

self.isScanning = NO;

[self.captureSession stopRunning];

self.ScanResult(nil,NO);

if (timer) {

[timer invalidate];

timer=nil;

}

_line.frame = CGRectMake(50, 50, 220, 2);

num = 0;

upOrdown = NO;

[self dismissViewControllerAnimated:YES completion:nil];

}

#pragma mark 开启相机

- (void)initCapture

{

self.captureSession = [[AVCaptureSession alloc] init];

AVCaptureDevice* inputDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

AVCaptureDeviceInput *captureInput = [AVCaptureDeviceInput deviceInputWithDevice:inputDevice error:nil];

[self.captureSession addInput:captureInput];

AVCaptureVideoDataOutput *captureOutput = [[AVCaptureVideoDataOutput alloc] init];

captureOutput.alwaysDiscardsLateVideoFrames = YES;

if (IOS7) {

AVCaptureMetadataOutput*_output=[[AVCaptureMetadataOutput alloc]init];

[_output setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];

[self.captureSession setSessionPreset:AVCaptureSessionPresetHigh];

[self.captureSession addOutput:_output];

_output.metadataObjectTypes =@[AVMetadataObjectTypeQRCode];

if (!self.captureVideoPreviewLayer) {

self.captureVideoPreviewLayer = [AVCaptureVideoPreviewLayer layerWithSession:self.captureSession];

}

// NSLog(@"prev %p %@", self.prevLayer, self.prevLayer);

self.captureVideoPreviewLayer.frame = self.view.bounds;

self.captureVideoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;

[self.view.layer addSublayer: self.captureVideoPreviewLayer];

self.isScanning = YES;

[self.captureSession startRunning];

}else{

[captureOutput setSampleBufferDelegate:self queue:dispatch_get_main_queue()];

NSString* key = (NSString *)kCVPixelBufferPixelFormatTypeKey;

NSNumber* value = [NSNumber numberWithUnsignedInt:kCVPixelFormatType_32BGRA];

NSDictionary *videoSettings = [NSDictionary dictionaryWithObject:value forKey:key];

[captureOutput setVideoSettings:videoSettings];

[self.captureSession addOutput:captureOutput];

NSString* preset = 0;

if (NSClassFromString(@"NSOrderedSet") && // Proxy for "is this iOS 5" ...

[UIScreen mainScreen].scale > 1 &&

[inputDevice

supportsAVCaptureSessionPreset:AVCaptureSessionPresetiFrame960x540]) {

// NSLog(@"960");

preset = AVCaptureSessionPresetiFrame960x540;

}

if (!preset) {

// NSLog(@"MED");

preset = AVCaptureSessionPresetMedium;

}

self.captureSession.sessionPreset = preset;

if (!self.captureVideoPreviewLayer) {

self.captureVideoPreviewLayer = [AVCaptureVideoPreviewLayer layerWithSession:self.captureSession];

}

// NSLog(@"prev %p %@", self.prevLayer, self.prevLayer);

self.captureVideoPreviewLayer.frame = self.view.bounds;

self.captureVideoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;

[self.view.layer addSublayer: self.captureVideoPreviewLayer];

self.isScanning = YES;

[self.captureSession startRunning];

}

}

- (UIImage *) imageFromSampleBuffer:(CMSampleBufferRef) sampleBuffer

{

CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);

// Lock the base address of the pixel buffer

CVPixelBufferLockBaseAddress(imageBuffer,0);

// Get the number of bytes per row for the pixel buffer

size_t bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer);

// Get the pixel buffer width and height

size_t width = CVPixelBufferGetWidth(imageBuffer);

size_t height = CVPixelBufferGetHeight(imageBuffer);

// Create a device-dependent RGB color space

CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();

if (!colorSpace)

{

NSLog(@"CGColorSpaceCreateDeviceRGB failure");

return nil;

}

// Get the base address of the pixel buffer

void *baseAddress = CVPixelBufferGetBaseAddress(imageBuffer);

// Get the data size for contiguous planes of the pixel buffer.

size_t bufferSize = CVPixelBufferGetDataSize(imageBuffer);

// Create a Quartz direct-access data provider that uses data we supply

CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, baseAddress, bufferSize,NULL);

// Create a bitmap image from data supplied by our data provider

CGImageRef cgImage =

CGImageCreate(width,height,8,32,bytesPerRow,colorSpace,kCGImageAlphaNoneSkipFirst |kCGBitmapByteOrder32Little,provider,NULL,true,kCGRenderingIntentDefault);

CGDataProviderRelease(provider);

CGColorSpaceRelease(colorSpace);

// Create and return an image object representing the specified Quartz image

UIImage *image = [UIImage imageWithCGImage:cgImage];

　return image;

}

#pragma mark 对图像进行解码

- (void)decodeImage:(UIImage *)image

{

self.isScanning = NO;

ZBarSymbol *symbol = nil;

ZBarReaderController* read = [ZBarReaderController new];

read.readerDelegate = self;

CGImageRef cgImageRef = image.CGImage;

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

if (symbol!=nil) {

if (timer) {

[timer invalidate];

timer=nil;

}

_line.frame = CGRectMake(50, 50, 220, 2);

num = 0;

upOrdown = NO;

self.ScanResult(symbol.data,YES);

[self.captureSession stopRunning];

[self dismissViewControllerAnimated:YES completion:nil];

}else{

timer = [NSTimer scheduledTimerWithTimeInterval:2 target:self selector:@selector(animation1) userInfo:nil repeats:YES];

num = 0;

upOrdown = NO;

self.isScanning = YES;

[self.captureSession startRunning];

}

}

#pragma mark - AVCaptureVideoDataOutputSampleBufferDelegate

- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection

{

UIImage *image = [self imageFromSampleBuffer:sampleBuffer];

[self decodeImage:image];

}

#pragma mark AVCaptureMetadataOutputObjectsDelegate//IOS7下触发

- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection

{

　　if (metadataObjects.count>0)

{

AVMetadataMachineReadableCodeObject * metadataObject = [metadataObjects objectAtIndex:0];

self.ScanResult(metadataObject.stringValue,YES);

}

[self.captureSession stopRunning];

_line.frame = CGRectMake(50, 50, 220, 2);

num = 0;

upOrdown = NO;

[self dismissViewControllerAnimated:YES completion:nil];

}

#pragma mark - UIImagePickerControllerDelegate

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

{

if (timer) {

[timer invalidate];

timer=nil;

}

_line.frame = CGRectMake(50, 50, 220, 2);

num = 0;

upOrdown = NO;

UIImage *image = [info objectForKey:@"UIImagePickerControllerEditedImage"];

[self dismissViewControllerAnimated:YES completion:^{[self decodeImage:image];}];

}

//相册取消

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

{

if (timer) {

[timer invalidate];

timer=nil;

}

_line.frame = CGRectMake(50, 50, 220, 2);

num = 0;

upOrdown = NO;

timer = [NSTimer scheduledTimerWithTimeInterval:2 target:self selector:@selector(animation1) userInfo:nil repeats:YES];

[self dismissViewControllerAnimated:YES completion:^{

self.isScanning = YES;

[self.captureSession startRunning];

}];

}

#pragma mark - DecoderDelegate

+(NSString*)zhengze:(NSString*)str

{

NSError *error;

//http+:[^\\s]* 这是检测网址的正则表达式

NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"http+:[^\\s]*" options:0 error:&error];//筛选

if (regex != nil) {

NSTextCheckingResult *firstMatch = [regex firstMatchInString:str options:0 range:NSMakeRange(0, [str length])];

if (firstMatch) {

NSRange resultRange = [firstMatch rangeAtIndex:0];

//从urlString中截取数据

NSString *result1 = [str substringWithRange:resultRange];

NSLog(@"正则表达后的结果%@",result1);

return result1;

}

}

return nil;

}

效果图：

开灯可以打开系统的手电筒，相册可以进入系统相册，如果选择的图片中包含有二维码，既可以自动扫描！

如有问题可以评论提问，有评必回！！！

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