411 lines
13 KiB
Objective-C
411 lines
13 KiB
Objective-C
//
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// FinQRCodeScanViewController.m
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// FinDemo
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//
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// Created by 胡健辉 on 2023/5/30.
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//
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#import "FinQRCodeScanViewController.h"
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#import <Photos/Photos.h>
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#import <AVFoundation/AVFoundation.h>
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#import <FinApplet/FinApplet.h>
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@interface FinQRCodeScanViewController ()<AVCaptureMetadataOutputObjectsDelegate>
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@property (nonatomic, strong) AVCaptureSession *session;
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@property (nonatomic, strong) FinQRScanView *scanView;
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@end
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@implementation FinQRCodeScanViewController
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- (void)viewDidLoad {
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[super viewDidLoad];
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// Do any additional setup after loading the view.
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[self p_initNavigationBar];
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[self p_addNotifications];
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[self p_initSubView];
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[self p_checkCameraStatus:^(BOOL granted) {
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if (granted) {
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[self p_initCameraSession];
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} else {
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[self p_showAlert:@"请在”设置-隐私-相机”选项中，允许访问你的相机" btnTitle:@"确定"];
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}
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}];
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}
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- (void)viewWillAppear:(BOOL)animated
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{
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[super viewWillAppear:animated];
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[self p_resumeScanning];
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}
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- (void)viewWillDisappear:(BOOL)animated
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{
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[super viewWillDisappear:animated];
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[self p_pauseScanning];
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}
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#pragma mark - ovverride
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- (void)updateNavigationBar
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{
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self.navigationController.navigationBar.tintColor = [UIColor whiteColor];
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[self.navigationController.navigationBar setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor whiteColor]}];
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self.navigationController.navigationBar.barTintColor = [UIColor blackColor];
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[UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleLightContent;
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[self.navigationController setNavigationBarHidden:NO animated:YES];
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}
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#pragma mark - private methods
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- (void)p_initNavigationBar
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{
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self.title = @"扫一扫";
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}
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- (void)p_addNotifications
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{
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[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appDidBecomeActive) name:UIApplicationDidBecomeActiveNotification object:nil];
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[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appWillResignActive) name:UIApplicationWillResignActiveNotification object:nil];
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}
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- (void)p_initSubView
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{
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self.view.backgroundColor = [UIColor blackColor];
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[self.view addSubview:self.scanView];
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}
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- (void)p_initCameraSession
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{
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AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
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if (!device) {
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return;
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}
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AVCaptureDeviceInput *deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:device error:nil];
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if (!deviceInput) {
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return;
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}
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AVCaptureMetadataOutput *metadataOutput = [[AVCaptureMetadataOutput alloc] init];
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[metadataOutput setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];
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// 配置扫描区域
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metadataOutput.rectOfInterest = CGRectMake(_scanView.scanner_y / self.view.frame.size.height, _scanView.scanner_x / self.view.frame.size.width, _scanView.scanner_width / self.view.frame.size.height, _scanView.scanner_width / self.view.frame.size.width);
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self.session = [[AVCaptureSession alloc] init];
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[self.session canSetSessionPreset:AVCaptureSessionPresetHigh];
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if ([self.session canAddInput:deviceInput]) {
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[self.session addInput:deviceInput];
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}
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if ([self.session canAddOutput:metadataOutput]) {
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[self.session addOutput:metadataOutput];
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}
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metadataOutput.metadataObjectTypes = @[AVMetadataObjectTypeQRCode];
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AVCaptureVideoPreviewLayer *videoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.session];
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videoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
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videoPreviewLayer.frame = self.view.layer.bounds;
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[self.view.layer insertSublayer:videoPreviewLayer atIndex:0];
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[self.session startRunning];
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}
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- (void)p_showAlert:(NSString *)title btnTitle:(NSString *)btnTitle
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{
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UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:title message:nil preferredStyle:UIAlertControllerStyleAlert];
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UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:title style:UIAlertActionStyleCancel handler:nil];
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[alertVC addAction:cancelAction];
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[self presentViewController:alertVC animated:YES completion:nil];
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}
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- (void)p_checkCameraStatus:(void (^)(BOOL granted))completion
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{
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AVAuthorizationStatus cameraStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
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switch (cameraStatus) {
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case AVAuthorizationStatusAuthorized:
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{
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if (completion) {
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completion(true);
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}
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}
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break;
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case AVAuthorizationStatusNotDetermined:
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{
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if (completion) {
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completion(true);
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}
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}
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break;
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default:
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{
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if (completion) {
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completion(false);
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}
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}
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break;
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}
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}
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/// 恢复扫一扫功能
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- (void)p_resumeScanning
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{
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[self.session startRunning];
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[self.scanView p_startScannerLineAnimation];
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}
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/// 暂停扫一扫功能
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- (void)p_pauseScanning
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{
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[self.session stopRunning];
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[self.scanView p_pauseScannerLineAnimation];
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}
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#pragma mark - QRCode handler
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- (void)handleQrCode:(NSString *)qrCode
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{
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[self.navigationController popViewControllerAnimated:YES];
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if (self.scanCompletion) {
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self.scanCompletion(qrCode);
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}
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}
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#pragma mark - notification handler
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- (void)appDidBecomeActive
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{
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[self p_resumeScanning];
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}
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- (void)appWillResignActive
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{
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[self p_pauseScanning];
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}
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#pragma mark - AVCaptureMetadataOutputObjectsDelegate
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-(void)captureOutput:(AVCaptureOutput *)output didOutputMetadataObjects:(NSArray<__kindof AVMetadataObject *> *)metadataObjects fromConnection:(AVCaptureConnection *)connection
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{
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if (metadataObjects != nil && metadataObjects.count > 0) {
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[self p_pauseScanning];
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AVMetadataMachineReadableCodeObject *obj = metadataObjects[0];
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[self handleQrCode:[obj stringValue]];
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} else {
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}
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}
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#pragma mark - setter && getter
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- (FinQRScanView *)scanView
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{
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if (!_scanView) {
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_scanView = [[FinQRScanView alloc] initWithFrame:self.view.bounds];
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}
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return _scanView;
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}
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@end
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const CGFloat scanner_borderWidth = 1.0; /** 扫描器边框宽度 */
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const CGFloat scanner_cornerWidth = 3.0; /** 扫描器棱角宽度 */
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const CGFloat scanner_cornerLength = 20.0; /** 扫描器棱角长度 */
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const CGFloat scanner_lineHeight = 1.0; /** 扫描器线条高度 */
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const CGFloat tipLab_height = 50.0; /** 扫描器下方提示文字高度 */
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static NSString *scannerLineAnmationKey = @"ScannerLineAnmationKey"; /** 扫描线条动画Key值 */
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@interface FinQRScanView ()
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@property (nonatomic, strong) UIColor *scannerBorderColor;
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@property (nonatomic, strong) UIColor *scannerCornerColor;
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@property (nonatomic, strong) UIImageView *scannerLine;
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@property (nonatomic, strong) UILabel *tipLabel;
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@property (nonatomic, strong) UIActivityIndicatorView *activityIndicator;
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@end
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@implementation FinQRScanView
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- (instancetype)initWithFrame:(CGRect)frame
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{
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self = [super initWithFrame:frame];
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if (self) {
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_scanner_width = 0.7 * frame.size.width;
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_scanner_x = (frame.size.width - _scanner_width) / 2;
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_scanner_y = 100;
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_scannerBorderColor = [UIColor whiteColor];
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_scannerCornerColor = [UIColor colorWithRed:66/255.0f green:134/255.0 blue:246/255.0 alpha:1.0];
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[self p_initSubViews];
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}
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return self;
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}
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- (void)p_initSubViews
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{
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self.backgroundColor = [UIColor clearColor];
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[self addSubview:self.scannerLine];
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[self addSubview:self.tipLabel];
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}
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- (void)p_startScannerLineAnimation
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{
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[self.scannerLine.layer removeAllAnimations];
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CABasicAnimation *lineAnimation = [CABasicAnimation animationWithKeyPath:@"transform"];
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lineAnimation.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeTranslation(0, _scanner_width - scanner_lineHeight, 1)];
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lineAnimation.duration = 4;
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lineAnimation.repeatCount = MAXFLOAT;
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[self.scannerLine.layer addAnimation:lineAnimation forKey:scannerLineAnmationKey];
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// 重置动画运行速度为1.0
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self.scannerLine.layer.speed = 1.0;
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}
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- (void)p_pauseScannerLineAnimation
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{
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// 取出当前时间，转成动画暂停的时间
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CFTimeInterval pauseTime = [self.scannerLine.layer convertTime:CACurrentMediaTime() fromLayer:nil];
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// 设置动画的时间偏移量，指定时间偏移量的目的是让动画定格在该时间点的位置
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self.scannerLine.layer.timeOffset = pauseTime;
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// 将动画的运行速度设置为0， 默认的运行速度是1.0
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self.scannerLine.layer.speed = 0;
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}
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- (void)p_addActivityIndicator
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{
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if (!_activityIndicator) {
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_activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
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_activityIndicator.center = self.center;
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[self addSubview:_activityIndicator];
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}
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[_activityIndicator startAnimating];
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}
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- (void)p_removeActivityIndicator
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{
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if (_activityIndicator) {
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[_activityIndicator removeFromSuperview];
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_activityIndicator = nil;
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}
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}
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- (void)drawRect:(CGRect)rect
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{
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[super drawRect:rect];
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// 半透明区域
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[[UIColor colorWithWhite:0 alpha:0.7] setFill];
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UIRectFill(rect);
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// 透明区域
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CGRect scanner_rect = CGRectMake(_scanner_x, _scanner_y, _scanner_width, _scanner_width);
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[[UIColor clearColor] setFill];
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UIRectFill(scanner_rect);
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// 边框
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UIBezierPath *borderPath = [UIBezierPath bezierPathWithRect:CGRectMake(_scanner_x, _scanner_y, _scanner_width, _scanner_width)];
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borderPath.lineCapStyle = kCGLineCapRound;
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borderPath.lineWidth = scanner_borderWidth;
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[_scannerBorderColor set];
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[borderPath stroke];
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for (int index = 0; index < 4; index++) {
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UIBezierPath *tempPath = [UIBezierPath bezierPath];
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tempPath.lineWidth = scanner_cornerWidth;
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[_scannerCornerColor set];
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switch (index) {
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// 左上角
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case 0:
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[tempPath moveToPoint:CGPointMake(_scanner_x + scanner_cornerLength, _scanner_y)];
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[tempPath addLineToPoint:CGPointMake(_scanner_x, _scanner_y)];
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[tempPath addLineToPoint:CGPointMake(_scanner_x, _scanner_y + scanner_cornerLength)];
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break;
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// 右上角
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case 1:
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[tempPath moveToPoint:CGPointMake(_scanner_x + _scanner_width - scanner_cornerLength, _scanner_y)];
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[tempPath addLineToPoint:CGPointMake(_scanner_x + _scanner_width, _scanner_y)];
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[tempPath addLineToPoint:CGPointMake(_scanner_x + _scanner_width, _scanner_y + scanner_cornerLength)];
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break;
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// 左下角
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case 2:
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[tempPath moveToPoint:CGPointMake(_scanner_x, _scanner_y + _scanner_width - scanner_cornerLength)];
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[tempPath addLineToPoint:CGPointMake(_scanner_x, _scanner_y + _scanner_width)];
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[tempPath addLineToPoint:CGPointMake(_scanner_x + scanner_cornerLength, _scanner_y + _scanner_width)];
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break;
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// 右下角
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case 3:
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[tempPath moveToPoint:CGPointMake(_scanner_x + _scanner_width - scanner_cornerLength, _scanner_y + _scanner_width)];
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[tempPath addLineToPoint:CGPointMake(_scanner_x + _scanner_width, _scanner_y + _scanner_width)];
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[tempPath addLineToPoint:CGPointMake(_scanner_x + _scanner_width, _scanner_y + _scanner_width - scanner_cornerLength)];
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break;
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}
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[tempPath stroke];
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}
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}
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- (UIImage *)fin_imageWithColor:(UIColor *)color
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{
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CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f); //宽高 1.0只要有值就够了
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UIGraphicsBeginImageContext(rect.size); //在这个范围内开启一段上下文
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CGContextRef context = UIGraphicsGetCurrentContext();
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CGContextSetFillColorWithColor(context, [color CGColor]);//在这段上下文中获取到颜色UIColor
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CGContextFillRect(context, rect);//用这个颜色填充这个上下文
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UIImage *image = UIGraphicsGetImageFromCurrentImageContext();//从这段上下文中获取Image属性,,,结束
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UIGraphicsEndImageContext();
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return image;
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}
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#pragma mark - setter && getter
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- (UIImageView *)scannerLine
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{
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if (!_scannerLine) {
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_scannerLine = [[UIImageView alloc] initWithFrame:CGRectMake(_scanner_x + 5, _scanner_y, _scanner_width - 10, scanner_lineHeight)];
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UIColor *tinColor = [UIColor colorWithRed:66/255.0f green:134/255.0 blue:246/255.0 alpha:1.0];
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_scannerLine.image = [self fin_imageWithColor:tinColor];
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}
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return _scannerLine;
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}
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- (UILabel *)tipLabel
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{
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if (!_tipLabel) {
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_tipLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, _scanner_y + _scanner_width, self.frame.size.width, 50)];
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_tipLabel.textAlignment = NSTextAlignmentCenter;
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_tipLabel.textColor = [UIColor lightGrayColor];
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_tipLabel.font = [UIFont systemFontOfSize:13];
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_tipLabel.text = @"将二维码放入框内，即可自动扫描";
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}
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return _tipLabel;
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}
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@end
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