tederen_ios/smartRhino/Project/Base/SubClass/SWQRCode/SWQRCodeViewController.m

//
//  SWQRCodeViewController.m
//  SWQRCode_Objc
//
//  Created by zhuku on 2018/4/4.
//  Copyright © 2018年 selwyn. All rights reserved.
//

#import "SWQRCodeViewController.h"
#import "SWScannerView.h"
#import <Photos/Photos.h>
@interface SWQRCodeViewController ()<AVCaptureMetadataOutputObjectsDelegate, AVCaptureVideoDataOutputSampleBufferDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate, TDNavigationBarDelegate>

/** 扫描器 */
@property (nonatomic, strong) SWScannerView *scannerView;
@property (nonatomic, strong) AVCaptureSession *session;

@end

@implementation SWQRCodeViewController

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (SWScannerView *)scannerView
{
    if (!_scannerView) {
        _scannerView = [[SWScannerView alloc]initWithFrame:self.view.bounds config:_codeConfig];;
    }
    return _scannerView;
}
- (BOOL)hidesBottomBarWhenPushed{
    return YES;
}
- (void)viewDidLoad {
    [super viewDidLoad];
    [self loadStatusBarColor:[UIColor blackColor]];
    UIBarButtonItem *albumItem = [[UIBarButtonItem alloc]initWithTitle:@"相册" style:UIBarButtonItemStylePlain target:self action:@selector(showAlbum)];
        [albumItem setTintColor:[UIColor blackColor]];
    self.navigationItem.rightBarButtonItem = albumItem;
    self.navigationItem.title = [SWQRCodeManager sw_navigationItemTitleWithType:self.codeConfig.scannerType];
    [self _setupUI];
    
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(appDidBecomeActive:)
                                                 name:UIApplicationDidBecomeActiveNotification
                                               object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(appWillResignActive:)
                                                 name:UIApplicationWillResignActiveNotification
                                               object:nil];
    
    
    self.fd_prefersNavigationBarHidden = YES;
}

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    [self resumeScanning];
  
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    [self.scannerView sw_setFlashlightOn:NO];
    [self.scannerView sw_hideFlashlightWithAnimated:YES];
}

- (void)_setupUI {
    [self.view addSubview:self.scannerView];
    
    self.view.backgroundColor = [UIColor colorWithWhite:0 alpha:.5f];
    
    
       TDNavigationBar *topBar = [[TDNavigationBar alloc] initNavigationBar];
       topBar.rightButton.hidden = NO;
       [topBar setNavigationTintType:NavigationTintTypeWhite];
       [topBar setBackButtonTitle:@" 信源"];
       [topBar.backButton setImageEdgeInsets:UIEdgeInsetsMake(0,20,0,0)];
       [topBar.backButton setTitleEdgeInsets:UIEdgeInsetsMake(0,0,0,-40)];
       topBar.backButton.frame = CGRectMake(0, 0,100,44);
       [topBar setRightButtonTitle:@"相册"];
       topBar.delegate = self;
       [self.view addSubview:topBar];
  
    
    
    // 校验相机权限
    [SWQRCodeManager sw_checkCameraAuthorizationStatusWithGrand:^(BOOL granted) {
        if (granted) {
            dispatch_async(dispatch_get_main_queue(), ^{
                [self _setupScanner];
            });
        }
    }];
}

#pragma mark - TDNavigationBarDelegate
- (void)rightButtonAction:(TDButton *)sender {
    [self showAlbum];
}

/** 创建扫描器 */
- (void)_setupScanner {
    
    AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
    AVCaptureDeviceInput *deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:device error:nil];
    
    AVCaptureMetadataOutput *metadataOutput = [[AVCaptureMetadataOutput alloc] init];
    [metadataOutput setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];
    if (self.codeConfig.scannerArea == SWScannerAreaDefault) {
        metadataOutput.rectOfInterest = CGRectMake([self.scannerView scanner_y]/self.view.frame.size.height, [self.scannerView scanner_x]/self.view.frame.size.width, [self.scannerView scanner_width]/self.view.frame.size.height, [self.scannerView scanner_width]/self.view.frame.size.width);
    }
    
    AVCaptureVideoDataOutput *videoDataOutput = [[AVCaptureVideoDataOutput alloc] init];
    [videoDataOutput setSampleBufferDelegate:self queue:dispatch_get_main_queue()];
    
    self.session = [[AVCaptureSession alloc]init];
    [self.session setSessionPreset:AVCaptureSessionPresetHigh];
    if ([self.session canAddInput:deviceInput]) {
        [self.session addInput:deviceInput];
    }
    if ([self.session canAddOutput:metadataOutput]) {
        [self.session addOutput:metadataOutput];
    }
    if ([self.session canAddOutput:videoDataOutput]) {
        [self.session addOutput:videoDataOutput];
    }
    
    metadataOutput.metadataObjectTypes = [SWQRCodeManager sw_metadataObjectTypesWithType:self.codeConfig.scannerType];
    
    AVCaptureVideoPreviewLayer *videoPreviewLayer = [AVCaptureVideoPreviewLayer layerWithSession:_session];
    videoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
    videoPreviewLayer.frame = self.view.layer.bounds;
    [self.view.layer insertSublayer:videoPreviewLayer atIndex:0];
    
    [self.session startRunning];
}

#pragma mark -- 跳转相册
- (void)imagePicker {
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc]init];
    imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    imagePicker.delegate = self;
//    [self presentViewController:imagePicker animated:YES completion:nil];
    imagePicker.navigationController.navigationBar.barTintColor = [UIColor redColor];
    [self presentViewController:imagePicker animated:YES completion:^{
//        UIViewController *control = imagePicker.viewControllers.lastObject;
//
////    UILabel *cancelLab=
//        control.view.superview.superview.superview.//((UILayoutContainerView *)0x10be2e610)
//        subviews.lastObject.//((UINavigationBar *)0x10be3bb90)
//        subviews.lastObject.//((_UINavigationBarContentView *)0x10bd19840)
//        subviews.firstObject.//((_UIButtonBarStackView *)0x10bd0fc30)
//        subviews.firstObject.//((_UIButtonBarButton *)0x10be68200)
//         subviews.firstObject.tintColor = [UIColor blackColor] ;//((_UIModernBarButton *)0x10bd99040)
//        control.view.superview.superview.superview.subviews.lastObject.subviews[2].subviews.firstObject.subviews.firstObject.subviews.firstObject.subviews.lastObject.opaque = YES;
////        superview.superview.superview.superview.superview.tintColor = [UIColor blackColor];
////    cancelLab.textColor = [UIColor blackColor];
//
////        UILabel *buttonLabel = control.navigationController.navigationBar.subviews.lastObject. //_UINavigationBarContentView
////        subviews.firstObject.//_UIButtonBarStackView
////        subviews.firstObject.//_UIButtonBarButton
////        subviews.firstObject;//_UIModernBarButton
////
//////        buttonLabel.textColor = [UIColor blueColor];
////        UIButton * button = control.navigationController.navigationBar.subviews.lastObject. //_UINavigationBarContentView
////        subviews.firstObject.//_UIButtonBarStackView
////        subviews.firstObject;//_UIButtonBarButton
//////        subviews.firstObject;//_UIModernBarButton
////
////        //
//////        UIBarButtonItem *rightBtn = [control valueForKey:@"imagePickerCancelButton"];
//////        UIButton *tempButton = [rightBtn valueForKey:@"view"];
////////        [tempButton setTitle:@"取消" forState:UIControlStateNormal];
//////        [tempButton setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
//        imagePicker.navigationController.navigationBar.barTintColor = [UIColor blackColor];
//
        
    }];
    imagePicker.modalTransitionStyle = self.navigationController.modalTransitionStyle;
    imagePicker.modalPresentationStyle = [UtilsTools modalPresentationStyle:self.navigationController.modalPresentationStyle];
    
    [self presentViewController:imagePicker animated:YES completion:nil];

}
#pragma mark -- AVCaptureMetadataOutputObjectsDelegate
- (void)captureOutput:(AVCaptureOutput *)output didOutputMetadataObjects:(NSArray<__kindof AVMetadataObject *> *)metadataObjects fromConnection:(AVCaptureConnection *)connection {
    
    // 获取扫一扫结果
    if (metadataObjects && metadataObjects.count > 0) {
        
        [self pauseScanning];
        AVMetadataMachineReadableCodeObject *metadataObject = metadataObjects[0];
        NSString *stringValue = metadataObject.stringValue;
        
        [self sw_handleWithValue:stringValue];
    }
}

#pragma mark -- AVCaptureVideoDataOutputSampleBufferDelegate
/** 此方法会实时监听亮度值 */
- (void)captureOutput:(AVCaptureOutput *)output didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection {
    
    CFDictionaryRef metadataDict = CMCopyDictionaryOfAttachments(NULL,sampleBuffer, kCMAttachmentMode_ShouldPropagate);
    NSDictionary *metadata = [[NSMutableDictionary alloc] initWithDictionary:(__bridge NSDictionary*)metadataDict];
    CFRelease(metadataDict);
    NSDictionary *exifMetadata = [[metadata objectForKey:(NSString *)kCGImagePropertyExifDictionary] mutableCopy];
    
    // 亮度值
    float brightnessValue = [[exifMetadata objectForKey:(NSString *)kCGImagePropertyExifBrightnessValue] floatValue];
    
    if (![self.scannerView sw_flashlightOn]) {
        if (brightnessValue < -4.0) {
            [self.scannerView sw_showFlashlightWithAnimated:YES];
        }else
        {
            [self.scannerView sw_hideFlashlightWithAnimated:YES];
        }
    }
}

- (void)showAlbum {
    // 校验相册权限
    [SWQRCodeManager sw_checkAlbumAuthorizationStatusWithGrand:^(BOOL granted) {
        if (granted) {
            [self imagePicker];
        }
    }];
}

#pragma mark -- UIImagePickerControllerDelegate
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
{
    UIImage *pickImage = info[UIImagePickerControllerOriginalImage];
    CIDetector *detector = [CIDetector detectorOfType:CIDetectorTypeQRCode context:nil options:@{CIDetectorAccuracy: CIDetectorAccuracyHigh}];
    // 获取选择图片中识别结果
    NSArray *features = [detector featuresInImage:[CIImage imageWithData:UIImagePNGRepresentation(pickImage)]];
    
    [picker dismissViewControllerAnimated:YES completion:^{
        if (features.count > 0) {
            CIQRCodeFeature *feature = features[0];
            NSString *stringValue = feature.messageString;
            [self sw_handleWithValue:stringValue];
        }
        else {
            [self sw_didReadFromAlbumFailed];
        }
    }];
}

#pragma mark -- App 从后台进入前台
- (void)appDidBecomeActive:(NSNotification *)notify {
    [self resumeScanning];
}

#pragma mark -- App 从前台进入后台
- (void)appWillResignActive:(NSNotification *)notify {
    [self pauseScanning];
}

/** 恢复扫一扫功能 */
- (void)resumeScanning {
    if (self.session) {
        [self.session startRunning];
        [self.scannerView sw_addScannerLineAnimation];
    }
}


/** 暂停扫一扫功能 */
- (void)pauseScanning {
    if (self.session) {
        [self.session stopRunning];
        [self.scannerView sw_pauseScannerLineAnimation];
    }
}

#pragma mark -- 扫一扫API
/**
 处理扫一扫结果
 @param value 扫描结果
 */
- (void)sw_handleWithValue:(NSString *)value {
    NSLog(@"sw_handleWithValue === %@", value);
    
    
    if ([self.delegate respondsToSelector:@selector(scanResult:)]) {
        [self.delegate scanResult:value];
        [self.navigationController popToRootViewControllerAnimated:YES];
    }
    
    
//    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://www.baidu.com?%@",value]] options:@{} completionHandler:^(BOOL success) {
//        [self.navigationController popToRootViewControllerAnimated:YES];
//    }];
   
}

/**
 相册选取图片无法读取数据
 */
- (void)sw_didReadFromAlbumFailed {
    NSLog(@"sw_didReadFromAlbumFailed");
}

- (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