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//
// ScannerViewController.m
// Lighting
//
// Created by 曹云霄 on 16/5/18.
// Copyright © 2016年 上海勾芒科技有限公司. All rights reserved.
//
#import "ScannerViewController.h"
#import <AVFoundation/AVFoundation.h>
@interface ScannerViewController ()<AVCaptureMetadataOutputObjectsDelegate>
/**
* 捕捉会话
*/
@property(strong,nonatomic) AVCaptureSession *session;
/**
* 展示layer
*/
@property(strong,nonatomic) AVCaptureVideoPreviewLayer *previewLayer;
/**
* 展示View
*/
@property (weak, nonatomic) IBOutlet UIImageView *scanRectView;
@end
@implementation ScannerViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
[self uiConfigAction];
}
#pragma mark -UI
- (void)uiConfigAction
{
// 1. 摄像头设备
AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
// 2. 设置输入
NSError *error = nil;
AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error];
if (error) {
NSLog(@"没有摄像头-%@", error.localizedDescription);
[self ErrorMBProgressView:@"开启摄像头失败"];
return;
}
// 3. 设置输出(Metadata元数据)
AVCaptureMetadataOutput *output = [[AVCaptureMetadataOutput alloc] init];
// 3.1 设置输出的代理
// 说明：使用主线程队列，相应比较同步，使用其他队列，相应不同步，容易让用户产生不好的体验
[output setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];
// [output setMetadataObjectsDelegate:self queue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)];
// 4. 拍摄会话
AVCaptureSession *session = [[AVCaptureSession alloc] init];
// 添加session的输入和输出
[session addInput:input];
[session addOutput:output];
//使用1080p的图像输出
session.sessionPreset = AVCaptureSessionPreset1920x1080;
// 4.1 设置输出的格式
// 提示：一定要先设置会话的输出为output之后，再指定输出的元数据类型！
[output setMetadataObjectTypes:[output availableMetadataObjectTypes]];
// 5. 设置预览图层（用来让用户能够看到扫描情况）
AVCaptureVideoPreviewLayer *preview = [AVCaptureVideoPreviewLayer layerWithSession:session];
// 5.1 设置preview图层的属性
preview.videoGravity = AVLayerVideoGravityResizeAspectFill;
// 5.2 设置preview图层的大小
preview.frame = [UIScreen mainScreen].bounds;
self.previewLayer = preview;
//
// UIView *view = [[UIView alloc]initWithFrame:CGRectMake(0, 0, ScreenHeight, ScreenWidth)];
// view.transform = CGAffineTransformMakeRotation(M_PI/2);
// [view.layer insertSublayer:self.previewLayer above:0];
[self.view.layer insertSublayer:self.previewLayer atIndex:0];
//
CGSize size = [UIScreen mainScreen].bounds.size;
CGRect cropRect = self.scanRectView.frame;
// CGFloat p1 = size.height/size.width;
// CGFloat p2 = 1920./1080.; //使用1080p的图像输出
output.rectOfInterest = CGRectMake(self.scanRectView.frame.origin.y/ScreenHeight,((ScreenWidth-self.scanRectView.frame.size.width)/2)/ScreenWidth, self.scanRectView.frame.size.height/ScreenHeight, self.scanRectView.frame.size.width/ScreenWidth);
//
// CGFloat fixHeight = [UIScreen mainScreen].bounds.size.width * 1920. / 1080.;
// CGFloat fixPadding = (fixHeight - size.height)/2;
// output.rectOfInterest = CGRectMake((cropRect.origin.y + fixPadding)/fixHeight,
// cropRect.origin.x/size.width,
// cropRect.size.height/fixHeight,
// cropRect.size.width/size.width);
NSLog(@"%@",NSStringFromCGRect(output.rectOfInterest));
// if (p1 < p2) {
// CGFloat fixHeight = [UIScreen mainScreen].bounds.size.width * 1920. / 1080.;
// CGFloat fixPadding = (fixHeight - size.height)/2;
// output.rectOfInterest = CGRectMake((cropRect.origin.y + fixPadding)/fixHeight,
// cropRect.origin.x/size.width,
// cropRect.size.height/fixHeight,
// cropRect.size.width/size.width);
// } else {
// CGFloat fixWidth = [UIScreen mainScreen].bounds.size.height * 1080. / 1920.;
// CGFloat fixPadding = (fixWidth - size.width)/2;
// output.rectOfInterest = CGRectMake(cropRect.origin.y/size.height,
// (cropRect.origin.x + fixPadding)/fixWidth,
// cropRect.size.height/size.height,
// cropRect.size.width/fixWidth);
// }
self.session = session;
[self.session startRunning];
}
#pragma mark - delegate
- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection
{
if (metadataObjects.count > 0) {
AVMetadataMachineReadableCodeObject *obj = metadataObjects[0];
[self.session stopRunning];
//扫描结果
if (self.ReturnScannerResponse) {
self.ReturnScannerResponse(obj.stringValue);
}
}
}
#pragma amrk -取消扫描
- (IBAction)cancelButtonClick:(UIButton *)sender {
[self.session stopRunning];
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end