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@ruandao
Created June 7, 2014 09:12
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二维码扫描 iOS7 && iOS 7 以上
#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
@protocol QRScannerViewControllerDelegate <NSObject>
- (void) catch:(NSString*)content;
@end
@interface QRScannerViewController : UIViewController
@property (assign, nonatomic) id<QRScannerViewControllerDelegate> delegate;
@end
#import "QRScannerViewController.h"
@interface QRScannerViewController () <AVCaptureMetadataOutputObjectsDelegate>
{
int num;
BOOL upOrdown;
NSTimer * timer;
}
@property (nonatomic)AVCaptureDevice * device;
@property (nonatomic)AVCaptureDeviceInput * input;
@property (nonatomic)AVCaptureMetadataOutput * output;
@property (nonatomic)AVCaptureSession * session;
@property (nonatomic)AVCaptureVideoPreviewLayer * preview;
@property (nonatomic, weak) UIImageView * line;
@end
@implementation QRScannerViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor grayColor];
UIButton * scanButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[scanButton setTitle:@"取消" forState:UIControlStateNormal];
scanButton.frame = CGRectMake(100, 420, 120, 40);
[scanButton addTarget:self action:@selector(backAction) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:scanButton];
UILabel * labIntroudction= [[UILabel alloc] initWithFrame:CGRectMake(15, 40, 290, 50)];
labIntroudction.backgroundColor = [UIColor clearColor];
labIntroudction.numberOfLines=2;
labIntroudction.textColor=[UIColor whiteColor];
labIntroudction.text=@"将二维码图像置于矩形方框内,离手机摄像头10CM左右,系统会自动识别。";
[self.view addSubview:labIntroudction];
UIImageView * imageView = [[UIImageView alloc]initWithFrame:CGRectMake(10, 100, 300, 300)];
imageView.image = [UIImage imageNamed:@"pick_bg"];
[self.view addSubview:imageView];
upOrdown = NO;
num =0;
UIImageView *line = [[UIImageView alloc] initWithFrame:CGRectMake(50, 110, 220, 2)];
line.image = [UIImage imageNamed:@"line.png"];
[self.view addSubview:line];
self.line = line;
// 画下滑的那条线
timer = [NSTimer scheduledTimerWithTimeInterval:.02 target:self selector:@selector(animation1) userInfo:nil repeats:YES];
}
-(void)animation1
{
if (upOrdown == NO) {
num ++;
self.line.frame = CGRectMake(50, 110+2*num, 220, 2);
if (2*num == 280) {
upOrdown = YES;
}
}
else {
num --;
self.line.frame = CGRectMake(50, 110+2*num, 220, 2);
if (num == 0) {
upOrdown = NO;
}
}
}
-(void)backAction
{
[self dismissViewControllerAnimated:YES completion:nil];
}
-(void)viewWillAppear:(BOOL)animated
{
[self setupCamera];
}
- (void)setupCamera
{
// 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()];
// 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];
// Preview
_preview =[AVCaptureVideoPreviewLayer layerWithSession:self.session];
_preview.videoGravity = AVLayerVideoGravityResizeAspectFill;
_preview.frame =CGRectMake(20,110,280,280);
[self.view.layer insertSublayer:self.preview atIndex:0];
// Start
[_session startRunning];
}
#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;
}
[self.delegate catch:stringValue];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)dealloc
{
NSLog(@"%@", timer);
[timer invalidate];
[_session stopRunning];
}
@end
-(void)setupCamera
{
QRScannerViewController * rt = [[QRScannerViewController alloc]init];
rt.delegate = self;
[self presentViewController:rt animated:YES completion:nil];
}
// delegate method
- (void)catch:(NSString *)content
{
NSLog(content);
}
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