//
//  Copyright © 2016年 hjl. All rights reserved.
//#import "HHBarcodeViewController.h"
#import <AVFoundation/AVFoundation.h>
@interface HHBarcodeViewController ()/** 会话 */
@property (nonatomic, strong) AVCaptureSession *session;//* 预览图层 */
@property (nonatomic, weak) AVCaptureVideoPreviewLayer *previewLayer;
@end@implementation HHBarcodeViewController- (void)viewDidLoad {[super viewDidLoad];// 条形码页面动画CADisplayLink *disp = [CADisplayLink displayLinkWithTarget:self selector:@selector(update)];[disp addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes];// 1. 实例化拍摄设备AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];// 2. 设置输入设备AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:nil];// 3. 实例化拍摄元数据输出AVCaptureMetadataOutput *output = [[AVCaptureMetadataOutput alloc] init];// 4. 设置输出数据代理[output setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];// 5. 添加拍摄会话AVCaptureSession *session = [[AVCaptureSession alloc] init];self.session = session;// 6. 添加会话输入/输出if ([session canAddInput:input]) {[session addInput:input];}if ([session canAddOutput:output]) {[session addOutput:output];}//7 设置输出数据类型，需要将元数据输出添加到会话后，才能指定元数据类型，否则会报错[output setMetadataObjectTypes:@[AVMetadataObjectTypeUPCECode,AVMetadataObjectTypeCode39Code,AVMetadataObjectTypeCode39Mod43Code,AVMetadataObjectTypeEAN13Code,AVMetadataObjectTypeEAN8Code,AVMetadataObjectTypeCode93Code,AVMetadataObjectTypeCode128Code,AVMetadataObjectTypePDF417Code,AVMetadataObjectTypeAztecCode,AVMetadataObjectTypeInterleaved2of5Code,AVMetadataObjectTypeITF14Code,AVMetadataObjectTypeDataMatrixCode,]];//8 实例化预览图层AVCaptureVideoPreviewLayer *previewLayer = [AVCaptureVideoPreviewLayer layerWithSession:session];previewLayer.frame = self.view.bounds;self.previewLayer = previewLayer;//previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;//9 将图层插入当前视图[self.view.layer insertSublayer:previewLayer atIndex:0];//10 启动会话[_session startRunning];}#pragma 代理
- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection{//1 判断是否获取到数据if (metadataObjects.count > 0) {//2 停止刷新[self.session stopRunning];//3 移除预览图层[self.previewLayer removeFromSuperlayer];//4 读取数据AVMetadataMachineReadableCodeObject *obj = [metadataObjects lastObject];HHLog(@"%@", obj.stringValue);}}- (void)update{_barcodeConsY.constant += 3;if(_barcodeConsY.constant >= 224){_barcodeConsY.constant = 0;}
}- (void)didReceiveMemoryWarning {[super didReceiveMemoryWarning];// Dispose of any resources that can be recreated.
}
@end