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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！
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原文地址：http://www.cnblogs.com/jiafuyang/p/5115089.html
