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.h
//
#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
@interface JKScannerViewController : UIViewController<AVCaptureMetadataOutputObjectsDelegate,UIAlertViewDelegate>
{
int num;
BOOL upOrdown;
NSTimer * timer;
UIImageView * imageView;
BOOL hasCameraRight;
}
@property (strong,nonatomic)AVCaptureDevice * device;
@property (strong,nonatomic)AVCaptureDeviceInput * input;
@property (strong,nonatomic)AVCaptureMetadataOutput * output;
@property (strong,nonatomic)AVCaptureSession * session;
@property (strong,nonatomic)AVCaptureVideoPreviewLayer * preview;
@property (nonatomic, retain) UIImageView * line;
@end
//扫一扫 页面
.m
//
//
// Created by bwrc on 17/6/5.
// Copyright © 2017年 bwrc. All rights reserved.
//
#import "JKScannerViewController.h"
#import "ViewUtils.h"
@interface JKScannerViewController ()
@property (nonatomic, strong) UIButton *flashlightBtn;
@end
@implementation JKScannerViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
[super viewDidLoad];
self.title = @"扫一扫";
self.view.backgroundColor = [UIColor blackColor];
//明暗对比
UIView *maskView = [[UIView alloc] initWithFrame:self.view.bounds];
maskView.backgroundColor = [UIColor colorWithRed:0 green:0 blue:0 alpha:0.5];
[self.view addSubview:maskView];
UIBezierPath *maskPath = [UIBezierPath bezierPathWithRect:CGRectMake(0, 0, widthScreen, heightScreen)];
[maskPath appendPath:[[UIBezierPath bezierPathWithRoundedRect:CGRectMake(50, 50+ 64,widthScreen - 100, widthScreen - 100) cornerRadius:1] bezierPathByReversingPath]];
CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
maskLayer.path = maskPath.CGPath;
maskView.layer.mask = maskLayer;
NSString *mediaType = AVMediaTypeVideo;
AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:mediaType];
if(authStatus == AVAuthorizationStatusRestricted || authStatus == AVAuthorizationStatusDenied){
UIAlertController *alert=[UIAlertController alertControllerWithTitle:@"没有相机权限" message:@"请去设置-隐私-相机中对扫一扫授权" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *action2=[UIAlertAction actionWithTitle:@"好的" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action2){
[self.navigationController popViewControllerAnimated:YES];
}];
[alert addAction:action2];
//5.将警告呈现出来
[self presentViewController:alert animated:YES completion:nil];
hasCameraRight = NO;
return;
}
hasCameraRight = YES;
imageView = [[UIImageView alloc]initWithFrame:CGRectMake(50, 50+ 64,widthScreen - 100, widthScreen - 100)];
imageView.image = [UIImage imageNamed:@"contact_scanframe"];
[self.view addSubview:imageView];
UILabel * introudctionLB= [[UILabel alloc] initWithFrame:CGRectMake(50, imageView.bottom + 20, widthScreen - 100, 30)];
introudctionLB.backgroundColor = [UIColor clearColor];
introudctionLB.textColor=[UIColor whiteColor];
introudctionLB.font = [UIFont systemFontOfSize:13];
introudctionLB.textAlignment = NSTextAlignmentCenter;
introudctionLB.text=@"将取景框对准二维码，即可自动扫描";
[self.view addSubview:introudctionLB];
self.flashlightBtn = [[UIButton alloc]initWithFrame:CGRectMake(widthScreen/2 - 20, introudctionLB.bottom + 20, 40, 40)];
[self.flashlightBtn setTitle:@"手电" forState:UIControlStateNormal];
[self.flashlightBtn addTarget:self action:@selector(flashlightBtnAction:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:self.flashlightBtn];
upOrdown = NO;
num =0;
_line = [[UIImageView alloc] initWithFrame:CGRectMake(50, 50+ 64 + 8, widthScreen - 100 - 40, 2)];
_line.x = self.view.x;
_line.image = [UIImage imageNamed:@"line"];
[self.view addSubview:_line];
[self setupCamera];
}
-(void)flashlightBtnAction:(UIButton *)sender {//闪光灯
Class captureDeviceClass = NSClassFromString(@"AVCaptureDevice");
if (captureDeviceClass != nil) {
AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
if ([device hasTorch]) { // 判断是否有闪光灯
// 请求独占访问硬件设备
[device lockForConfiguration:nil];
if (sender.tag == 0) {
sender.tag = 1;
[device setTorchMode:AVCaptureTorchModeOn]; // 手电筒开
}else{
sender.tag = 0;
[device setTorchMode:AVCaptureTorchModeOff]; // 手电筒关
}
// 请求解除独占访问硬件设备
[device unlockForConfiguration];
}
}
}
-(void)animation1
{
if (upOrdown == NO) {
num ++;
_line.frame = CGRectMake(CGRectGetMinX(_line.frame), 50+ 64 + 8+2*num, CGRectGetWidth(_line.frame), CGRectGetHeight(_line.frame));
if (2 * num >= CGRectGetHeight(imageView.frame) - 16) {
upOrdown = YES;
}
}
else {
num --;
_line.frame = CGRectMake(CGRectGetMinX(_line.frame), 50+ 64 + 8+2*num, CGRectGetWidth(_line.frame), CGRectGetHeight(_line.frame));
if (num == 0) {
upOrdown = NO;
}
}
}
-(void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
if (hasCameraRight) {
if (_session && ![_session isRunning]) {
[_session startRunning];
}
timer = [NSTimer scheduledTimerWithTimeInterval:.02 target:self selector:@selector(animation1) userInfo:nil repeats:YES];
}
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[timer invalidate];
}
- (void)setupCamera
{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
// 耗时的操作
// Device
_device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
// Input
_input = [AVCaptureDeviceInput deviceInputWithDevice:self.device error:nil];
// Output
_output = [[AVCaptureMetadataOutput alloc]init];
// [_output setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];
[_output setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];
// Session
_session = [[AVCaptureSession alloc]init];
[_session setSessionPreset:AVCaptureSessionPresetHigh];
if ([_session canAddInput:self.input])
{
[_session addInput:self.input];
}
if ([_session canAddOutput:self.output])
{
[_session addOutput:self.output];
}
// 条码类型 AVMetadataObjectTypeQRCode
_output.metadataObjectTypes = @[AVMetadataObjectTypeQRCode,AVMetadataObjectTypeEAN13Code, AVMetadataObjectTypeEAN8Code, AVMetadataObjectTypeCode128Code];
dispatch_async(dispatch_get_main_queue(), ^{
// 更新界面
// Preview
_preview =[AVCaptureVideoPreviewLayer layerWithSession:self.session];
_preview.videoGravity = AVLayerVideoGravityResizeAspectFill;
// _preview.frame =CGRectMake(20,110,280,280);
_preview.frame = self.view.bounds;
[self.view.layer insertSublayer:self.preview atIndex:0];
// Start
[_session startRunning];
CGRect intertRect = [_preview metadataOutputRectOfInterestForRect:imageView.frame];
//限制区域
[ _output setRectOfInterest : intertRect];
});
});
}
#pragma mark AVCaptureMetadataOutputObjectsDelegate
- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection
{
NSString *stringValue;
if ([metadataObjects count] >0)
{
AVMetadataMachineReadableCodeObject * metadataObject = [metadataObjects objectAtIndex:0];
stringValue = metadataObject.stringValue;
[_session stopRunning];
[timer invalidate];
NSLog(@"%@",stringValue);
if (stringValue.length > 0) {
UIAlertController *alert=[UIAlertController alertControllerWithTitle:@"扫描结果" message:@"只能扫面展商名片" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *action2=[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action2){
[self.navigationController popViewControllerAnimated:YES];
}];
[alert addAction:action2];
//5.将警告呈现出来
[self presentViewController:alert animated:YES completion:nil];
}
}
}
@end
