94 lines
3.7 KiB
Objective-C
94 lines
3.7 KiB
Objective-C
//
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// Created by pengfei.zhou on 2019/11/21.
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// Copyright (c) 2019 pengfei.zhou. All rights reserved.
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//
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#import "QRScanViewController.h"
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#import <AVFoundation/AVFoundation.h>
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#import <Doric/Doric.h>
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@interface QRScanViewController () <AVCaptureMetadataOutputObjectsDelegate>
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@property(strong, nonatomic) AVCaptureDevice *device;
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@property(strong, nonatomic) AVCaptureDeviceInput *input;
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@property(strong, nonatomic) AVCaptureMetadataOutput *output;
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@property(strong, nonatomic) AVCaptureSession *session;
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@property(strong, nonatomic) AVCaptureVideoPreviewLayer *previewLayer;
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@property(strong, nonatomic) UIPinchGestureRecognizer *pinchGes;
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@property(assign, nonatomic) CGFloat scanRegion_W;
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@property(assign, nonatomic) CGFloat initScale;
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@end
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@implementation QRScanViewController
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- (void)viewDidLoad {
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[super viewDidLoad];
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self.title = @"扫一扫";
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[self configBasicDevice];
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[self configPinchGes];
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[self.session startRunning];
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}
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- (void)configBasicDevice {
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self.device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
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self.input = [[AVCaptureDeviceInput alloc] initWithDevice:self.device error:nil];
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self.output = [[AVCaptureMetadataOutput alloc] init];
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[self.output setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];
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self.session = [[AVCaptureSession alloc] init];
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[self.session setSessionPreset:AVCaptureSessionPresetHigh];
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if ([self.session canAddInput:self.input]) {
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[self.session addInput:self.input];
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}
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if ([self.session canAddOutput:self.output]) {
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[self.session addOutput:self.output];
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}
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[self.output setMetadataObjectTypes:@[AVMetadataObjectTypeQRCode]];
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[self.output setRectOfInterest:CGRectMake(0, 0, 1, 1)];
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self.previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.session];
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self.previewLayer.frame = CGRectMake(0, 0, self.view.width, self.view.height);
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self.previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
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[self.view.layer addSublayer:self.previewLayer];
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}
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- (void)configPinchGes {
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self.pinchGes = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchDetected:)];
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[self.view addGestureRecognizer:self.pinchGes];
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}
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- (void)pinchDetected:(UIPinchGestureRecognizer *)recogniser {
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if (!_device) {
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return;
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}
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if (recogniser.state == UIGestureRecognizerStateBegan) {
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_initScale = _device.videoZoomFactor;
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}
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NSError *error = nil;
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[_device lockForConfiguration:&error];
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if (!error) {
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CGFloat zoomFactor;
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CGFloat scale = recogniser.scale;
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if (scale < 1.0f) {
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zoomFactor = self.initScale - pow(self.device.activeFormat.videoMaxZoomFactor, 1.0f - recogniser.scale);
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} else {
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zoomFactor = self.initScale + pow(self.device.activeFormat.videoMaxZoomFactor, (recogniser.scale - 1.0f) / 2.0f);
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}
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zoomFactor = MIN(15.0f, zoomFactor);
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zoomFactor = MAX(1.0f, zoomFactor);
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_device.videoZoomFactor = zoomFactor;
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[_device unlockForConfiguration];
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}
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}
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#pragma mark - AVCaptureMetadataOutputObjectsDelegate
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- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection {
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[self.session stopRunning];
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if ([metadataObjects count] >= 1) {
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AVMetadataMachineReadableCodeObject *qrObject = [metadataObjects lastObject];
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NSString *result = qrObject.stringValue;
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NSLog(@"Scan result is %@", result);
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[[DoricDriver instance] connectDevKit:[NSString stringWithFormat:@"ws://%@:7777", result]];
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ShowToast([NSString stringWithFormat:@"Connected to %@", result], BOTTOM);
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[self.navigationController popViewControllerAnimated:NO];
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}
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}
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@end
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