上次是根據系統的屬性自己封裝的一個二維碼掃描，這次給大家介紹一下基于ZBar集成的類似于QQ二維碼掃描界面的二維碼掃描的效果。

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?最下方配有效果圖哦！

首先，需要引入ZBar第三方庫文件：

ZBarSDK

libqrencode

其次，利用ZBar集成二維碼掃描需要引入的類庫有：

libiconv.tbd

QuartzCore.framework

CoreVideo.framework

CoreMedia.framework

AVFoundation.framework

代碼實現：

-(void)createView{

? ? //掃描頁的背景圖片

? ? 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];

?? ?

? ? //掃描框下面的提示語

? ? 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 = @"將取景框對準二維碼，即可自動掃描。";

? ? ? ? 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 = @"將取景框對準二維碼，即可自動掃描。";

? ? ? ? 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];

?

? ? }

? ? //初始化掃描線

? ? //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];

? ? //下方相冊

? ? 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;

? ? ? ? }??

? ? }

? ? //假導航

? ? 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=@"掃一掃";

? ? [navImageView addSubview:titleLabel];

? ? //返回按鈕

? ? 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];

}

?

//掃描線的動畫效果

-(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);

? ? ? ? ? ? }

? ? ? ? }];

? ? }];

}

//開啟關閉閃光燈

-(void)flashLightClick{

? ? AVCaptureDevice * device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

?? ?

? ? if (device.torchMode==AVCaptureTorchModeOff) {

? ? ? ? //閃光燈開啟

? ? ? ? [device lockForConfiguration:nil];

? ? ? ? [device setTorchMode:AVCaptureTorchModeOn];

? ? }else {

? ? ? ? //閃光燈關閉

? ? ? ??[device setTorchMode:AVCaptureTorchModeOff];

? ? }

}

?

- (void)viewDidLoad

{

?? ?

? ? //相機界面的定制在self.view上加載即可

? ? BOOL Custom= [UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera];//判斷攝像頭是否能用

? ? if (Custom) {

? ? ? ? [self initCapture];//啟動攝像頭

? ? }

? ? [self createView];

? ? [super viewDidLoad];

?? ?

}

#pragma mark 選擇相冊

- (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 點擊取消

- (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 開啟相機

- (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 對圖像進行解碼

- (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下觸發

- (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];}];

}

//相冊取消

- (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]* 這是檢測網址的正則表達式

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

? ??? ? if (regex != nil) {

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

? ? ? ? if (firstMatch) {

? ? ? ? ? ? NSRange resultRange = [firstMatch rangeAtIndex:0];

? ? ? ? ? ? //從urlString中截取數據

? ? ? ? ? ? NSString *result1 = [str substringWithRange:resultRange];

? ? ? ? ? ? NSLog(@"正則表達后的結果%@",result1);

? ? ? ? ? ? return result1;? ? ? ? ? ??

? ? ? ? }

? ? }

? ? return nil;

}

?

?

效果圖：

?

開燈可以打開系統的手電筒，相冊可以進入系統相冊，如果選擇的圖片中包含有二維碼，既可以自動掃描！

?

如有問題可以評論提問，有評必回！！！

2015最后一天，祝大家新年快樂！記得給個贊哦^_^

?

轉載于:https://www.cnblogs.com/MasterPeng/p/5091630.html

創作挑戰賽新人創作獎勵來咯，堅持創作打卡瓜分現金大獎

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