chore: import upstream snapshot with attribution
This commit is contained in:
wehub-resource-sync
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//
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// TLScannerViewController.m
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// TLChat
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//
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// Created by 李伯坤 on 16/2/24.
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// Copyright © 2016年 李伯坤. All rights reserved.
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//
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#import "TLScannerViewController.h"
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#import "TLScannerView.h"
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#import "TLScannerBackgroundView.h"
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#import <AVFoundation/AVFoundation.h>
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@interface TLScannerViewController () <AVCaptureMetadataOutputObjectsDelegate>
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@property (nonatomic, strong) UILabel *introudctionLabel;
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@property (nonatomic, strong) TLScannerView *scannerView;
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@property (nonatomic, strong) TLScannerBackgroundView *scannerBGView;
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@property (nonatomic, strong) AVCaptureSession *scannerSession;
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@property (nonatomic, strong) AVCaptureVideoPreviewLayer *videoPreviewLayer;
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@end
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@implementation TLScannerViewController
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+ (void)scannerQRCodeFromImage:(UIImage *)image ans:(void (^)(NSString *ansStr))ans
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{
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dispatch_async(dispatch_get_global_queue(0, 0), ^{
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NSData *imageData = (UIImagePNGRepresentation(image) ? UIImagePNGRepresentation(image) :UIImageJPEGRepresentation(image, 1));
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CIImage *ciImage = [CIImage imageWithData:imageData];
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NSString *ansStr = nil;
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if (ciImage) {
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CIDetector *detector = [CIDetector detectorOfType:CIDetectorTypeQRCode context:[CIContext contextWithOptions:nil] options:@{CIDetectorAccuracy:CIDetectorAccuracyHigh}];
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NSArray *features = [detector featuresInImage:ciImage];
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if (features.count) {
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for (CIFeature *feature in features) {
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if ([feature isKindOfClass:[CIQRCodeFeature class]]) {
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ansStr = ((CIQRCodeFeature *)feature).messageString;
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break;
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}
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}
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}
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}
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dispatch_async(dispatch_get_main_queue(), ^{
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ans(ansStr);
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});
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});
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}
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- (void)viewDidLoad
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{
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[super viewDidLoad];
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[self.view setBackgroundColor:[UIColor blackColor]];
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[self.view addSubview:self.introudctionLabel];
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[self.view addSubview:self.scannerView];
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[self.view addSubview:self.scannerBGView];
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[self.view.layer insertSublayer:self.videoPreviewLayer atIndex:0];
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[self p_addMasonry];
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}
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- (void)viewDidAppear:(BOOL)animated
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{
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[super viewDidAppear:animated];
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if (self.scannerSession) {
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if (_delegate && [_delegate respondsToSelector:@selector(scannerViewControllerInitSuccess:)]) {
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[_delegate scannerViewControllerInitSuccess:self];
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}
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}
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else {
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if (_delegate && [_delegate respondsToSelector:@selector(scannerViewController:initFailed:)]) {
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[_delegate scannerViewController:self initFailed:@"相机初始化失败"];
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}
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}
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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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if ([self.scannerSession isRunning]) {
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[self stopCodeReading];
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}
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}
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#pragma mark - Public Methods -
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- (void)setScannerType:(TLScannerType)scannerType
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{
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if (_scannerType == scannerType) {
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return;
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}
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_scannerType = scannerType;
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CGFloat width = 0;
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CGFloat height = 0;
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if (scannerType == TLScannerTypeQR) {
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[self.introudctionLabel setText:@"将二维码/条码放入框内，即可自动扫描"];
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width = height = SCREEN_WIDTH * 0.7;
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}
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else if (scannerType == TLScannerTypeCover) {
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[self.introudctionLabel setText:@"将书、CD、电影海报放入框内，即可自动扫描"];
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width = height = SCREEN_WIDTH * 0.85;
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}
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else if (scannerType == TLScannerTypeStreet) {
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[self.introudctionLabel setText:@"扫一下周围环境，寻找附近街景"];
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width = height = SCREEN_WIDTH * 0.85;
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}
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else if (scannerType == TLScannerTypeTranslate) {
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width = SCREEN_WIDTH * 0.7;
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height = 55;
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[self.introudctionLabel setText:@"将英文单词放入框内"];
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}
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[self.scannerView setHiddenScannerIndicator:scannerType == TLScannerTypeTranslate];
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[UIView animateWithDuration:0.3 animations:^{
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[self.scannerView mas_updateConstraints:^(MASConstraintMaker *make) {
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make.width.mas_equalTo(width);
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make.height.mas_equalTo(height);
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}];
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[self.view layoutIfNeeded];
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}];
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// rect值范围0-1，基准点在右上角
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CGRect rect = CGRectMake(self.scannerView.y / SCREEN_HEIGHT, self.scannerView.x / SCREEN_WIDTH, self.scannerView.height / SCREEN_HEIGHT, self.scannerView.width / SCREEN_WIDTH);
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[self.scannerSession.outputs[0] setRectOfInterest:rect];
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if (!self.isRunning) {
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[self startCodeReading];
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}
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}
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- (void)startCodeReading
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{
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[self.scannerView startScanner];
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[self.scannerSession startRunning];
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}
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- (void)stopCodeReading
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{
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[self.scannerView stopScanner];
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[self.scannerSession stopRunning];
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}
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- (BOOL)isRunning
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{
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return [self.scannerSession isRunning];
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}
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#pragma mark - Delegate -
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- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection
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{
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if (metadataObjects.count > 0) {
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[self stopCodeReading];
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AVMetadataMachineReadableCodeObject *obj = metadataObjects[0];
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if (_delegate && [_delegate respondsToSelector:@selector(scannerViewController:scanAnswer:)]) {
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[_delegate scannerViewController:self scanAnswer:obj.stringValue];
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}
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}
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}
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#pragma mark - Private Methods -
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- (void)p_addMasonry
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{
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[self.scannerView mas_makeConstraints:^(MASConstraintMaker *make) {
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make.centerX.mas_equalTo(self.view);
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make.centerY.mas_equalTo(self.view).mas_offset(-55);
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make.width.and.height.mas_equalTo(0);
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}];
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[self.scannerBGView mas_makeConstraints:^(MASConstraintMaker *make) {
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make.edges.mas_equalTo(self.view);
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}];
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[_scannerBGView addMasonryWithContainView:self.scannerView];
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[self.introudctionLabel mas_makeConstraints:^(MASConstraintMaker *make) {
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make.left.and.width.mas_equalTo(self.view);
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make.top.mas_equalTo(self.scannerView.mas_bottom).mas_offset(30);
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}];
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}
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#pragma mark - Getter -
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- (AVCaptureSession *)scannerSession
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{
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if (_scannerSession == nil) {
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AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
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NSError *error = nil;
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AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error];
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if (error) { // 没有摄像头
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return nil;
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}
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AVCaptureMetadataOutput *output = [[AVCaptureMetadataOutput alloc] init];
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[output setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];
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AVCaptureSession *session = [[AVCaptureSession alloc] init];
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if ([session canSetSessionPreset:AVCaptureSessionPreset1920x1080]) {
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[session setSessionPreset:AVCaptureSessionPreset1920x1080];
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}
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else if ([session canSetSessionPreset:AVCaptureSessionPreset1280x720]) {
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[session setSessionPreset:AVCaptureSessionPreset1280x720];
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}
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else {
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[session setSessionPreset:AVCaptureSessionPresetPhoto];
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}
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if ([session canAddInput:input]) {
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[session addInput:input];
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}
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if ([session canAddOutput:output]) {
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[session addOutput:output];
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}
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[output setMetadataObjectTypes:@[AVMetadataObjectTypeEAN13Code, AVMetadataObjectTypeEAN8Code, AVMetadataObjectTypeCode128Code, AVMetadataObjectTypeQRCode]];
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_scannerSession = session;
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}
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return _scannerSession;
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}
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- (AVCaptureVideoPreviewLayer *)videoPreviewLayer
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{
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if (_videoPreviewLayer == nil) {
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_videoPreviewLayer = [AVCaptureVideoPreviewLayer layerWithSession:self.scannerSession];
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[_videoPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];
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[_videoPreviewLayer setFrame:self.view.layer.bounds];
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}
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return _videoPreviewLayer;
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}
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- (UILabel *)introudctionLabel
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{
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if (_introudctionLabel == nil) {
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_introudctionLabel = [[UILabel alloc] init];
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[_introudctionLabel setBackgroundColor:[UIColor clearColor]];
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[_introudctionLabel setTextAlignment:NSTextAlignmentCenter];
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[_introudctionLabel setFont:[UIFont systemFontOfSize:12.0]];
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[_introudctionLabel setTextColor:[UIColor whiteColor]];
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}
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return _introudctionLabel;
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}
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- (TLScannerView *)scannerView
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{
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if (_scannerView == nil) {
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_scannerView = [[TLScannerView alloc] init];
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}
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return _scannerView;
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}
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- (TLScannerBackgroundView *)scannerBGView
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{
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if (_scannerBGView == nil) {
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_scannerBGView = [[TLScannerBackgroundView alloc] init];
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}
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return _scannerBGView;
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}
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@end
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