iOS 二维码 2

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// SYQRCodeViewController.h

// SYQRCodeDemo

// Created by sunbb on 15-1-9.

#import <UIKit/UIKit.h>

@interface SYQRCodeViewController :UIViewController

@property (nonatomic,copy) void (^SYQRCodeCancleBlock) (SYQRCodeViewController *);//扫描取消

@property (nonatomic,copy) void (^SYQRCodeSuncessBlock) (SYQRCodeViewController *,NSString *);//扫描结果

@property (nonatomic,copy) void (^SYQRCodeFailBlock) (SYQRCodeViewController *);//扫描失败

@end

// SYQRCodeViewController.m

// SYQRCodeDemo

// Created by sunbb on 15-1-9.

#import "SYQRCodeViewController.h"

#import <AVFoundation/AVFoundation.h>

//设备宽/高/坐标

#define kDeviceWidth [UIScreen mainScreen].bounds.size.width

#define KDeviceHeight [UIScreen mainScreen].bounds.size.height

#define KDeviceFrame [UIScreen mainScreen].bounds

static constfloat kLineMinY = 185;

static constfloat kLineMaxY = 385;

static constfloat kReaderViewWidth =200;

static constfloat kReaderViewHeight =200;

@interface SYQRCodeViewController () <AVCaptureMetadataOutputObjectsDelegate>

@property (nonatomic,strong) AVCaptureSession *qrSession;//回话

@property (nonatomic,strong) AVCaptureVideoPreviewLayer *qrVideoPreviewLayer;//读取

@property (nonatomic,strong) UIImageView *line;//交互线

@property (nonatomic,strong) NSTimer *lineTimer;//交互线控制

@end

@implementation SYQRCodeViewController

- (void)viewDidLoad

{

[superviewDidLoad];

// Do any additional setup after loading the view.

self.view.backgroundColor = [UIColorwhiteColor];

[selfinitUI];

[selfsetOverlayPickerView];

[selfstartSYQRCodeReading];

[selfinitTitleView];

[selfcreateBackBtn];

}

- (void)dealloc

{

if (_qrSession) {

[_qrSessionstopRunning];

_qrSession =nil;

}

if (_qrVideoPreviewLayer) {

_qrVideoPreviewLayer =nil;

}

if (_line) {

_line =nil;

}

if (_lineTimer)

{

[_lineTimerinvalidate];

_lineTimer =nil;

}

- (void)initTitleView

{

UIView *bgView = [[UIViewalloc] initWithFrame:CGRectMake(0,0,kDeviceWidth,64)];

bgView.backgroundColor = [UIColorcolorWithRed:62.0/255green:199.0/255blue:153.0/255alpha:1.0];

[self.viewaddSubview:bgView];

UILabel *titleLab = [[UILabelalloc] initWithFrame:CGRectMake((kDeviceWidth - 40) / 2.0,28, 40,20)];

//scanCropView.image=[UIImage imageNamed:@""];

//titleLab.layer.borderColor = [UIColor greenColor].CGColor;

//titleLab.layer.borderWidth = 2.0;

//titleLab.backgroundColor = [UIColor colorWithRed:62.0/255 green:199.0/255 blue:153.0/255 alpha:1.0];

titleLab.text =@"扫题";

titleLab.shadowColor = [UIColorlightGrayColor];

titleLab.shadowOffset =CGSizeMake(0, -1);

titleLab.font = [UIFontboldSystemFontOfSize:18.0];

titleLab.textColor = [UIColorwhiteColor];

titleLab.textAlignment =NSTextAlignmentCenter;

[self.viewaddSubview:titleLab];

}

- (void)createBackBtn

{

UIButton *btn = [UIButtonbuttonWithType:UIButtonTypeCustom];

[btn setFrame:CGRectMake(20,28, 60,24)];

[btn setImage:[UIImageimageNamed:@"bar_back"]forState:UIControlStateNormal];

[btn addTarget:selfaction:@selector(cancleSYQRCodeReading)forControlEvents:UIControlEventTouchUpInside];

[self.viewaddSubview:btn];

}

- (void)initUI

{

AVCaptureDevice *device = [AVCaptureDevicedefaultDeviceWithMediaType:AVMediaTypeVideo];

//摄像头判断

NSError *error =nil;

AVCaptureDeviceInput *input = [AVCaptureDeviceInputdeviceInputWithDevice:deviceerror:&error];

if (error)

{

NSLog(@"没有摄像头-%@", error.localizedDescription);

return;

}

//设置输出(Metadata元数据)

AVCaptureMetadataOutput *output = [[AVCaptureMetadataOutputalloc] init];

//设置输出的代理

//使用主线程队列，相应比较同步，使用其他队列，相应不同步，容易让用户产生不好的体验

[output setMetadataObjectsDelegate:selfqueue:dispatch_get_main_queue()];

[output setRectOfInterest:[selfgetReaderViewBoundsWithSize:CGSizeMake(kReaderViewWidth,kReaderViewHeight)]];

//拍摄会话

AVCaptureSession *session = [[AVCaptureSessionalloc] init];

// 读取质量，质量越高，可读取小尺寸的二维码

if ([sessioncanSetSessionPreset:AVCaptureSessionPreset1920x1080])

{

[session setSessionPreset:AVCaptureSessionPreset1920x1080];

}

elseif ([sessioncanSetSessionPreset:AVCaptureSessionPreset1280x720])

{

[session setSessionPreset:AVCaptureSessionPreset1280x720];

}

else

{

[session setSessionPreset:AVCaptureSessionPresetPhoto];

}

if ([sessioncanAddInput:input])

{

[session addInput:input];

}

if ([sessioncanAddOutput:output])

{

[session addOutput:output];

}

//设置输出的格式

//一定要先设置会话的输出为output之后，再指定输出的元数据类型

[output setMetadataObjectTypes:@[AVMetadataObjectTypeQRCode]];

//设置预览图层

AVCaptureVideoPreviewLayer *preview = [AVCaptureVideoPreviewLayerlayerWithSession:session];

//设置preview图层的属性

//preview.borderColor = [UIColor redColor].CGColor;

//preview.borderWidth = 1.5;

[preview setVideoGravity:AVLayerVideoGravityResizeAspectFill];

//设置preview图层的大小

preview.frame =self.view.layer.bounds;

//[preview setFrame:CGRectMake(0, 0, kDeviceWidth, KDeviceHeight)];

//将图层添加到视图的图层

[self.view.layerinsertSublayer:preview atIndex:0];

//[self.view.layer addSublayer:preview];

self.qrVideoPreviewLayer = preview;

self.qrSession = session;

}

- (CGRect)getReaderViewBoundsWithSize:(CGSize)asize

{

returnCGRectMake(kLineMinY /KDeviceHeight, ((kDeviceWidth - asize.width) /2.0) / kDeviceWidth, asize.height /KDeviceHeight, asize.width /kDeviceWidth);

}

- (void)setOverlayPickerView

{

//画中间的基准线

_line = [[UIImageViewalloc] initWithFrame:CGRectMake((kDeviceWidth - 300) / 2.0,kLineMinY, 300,12 * 300 /320.0)];

[_linesetImage:[UIImageimageNamed:@"QRCodeLine"]];

[self.viewaddSubview:_line];

//最上部view

UIView* upView = [[UIViewalloc] initWithFrame:CGRectMake(0,0, kDeviceWidth,kLineMinY)];//80

upView.alpha =0.3;

upView.backgroundColor = [UIColorblackColor];

[self.viewaddSubview:upView];

//左侧的view

UIView *leftView = [[UIViewalloc] initWithFrame:CGRectMake(0,kLineMinY, (kDeviceWidth -kReaderViewWidth) / 2.0, kReaderViewHeight)];

leftView.alpha =0.3;

leftView.backgroundColor = [UIColorblackColor];

[self.viewaddSubview:leftView];

//右侧的view

UIView *rightView = [[UIViewalloc] initWithFrame:CGRectMake(kDeviceWidth - CGRectGetMaxX(leftView.frame),kLineMinY, CGRectGetMaxX(leftView.frame),kReaderViewHeight)];

rightView.alpha =0.3;

rightView.backgroundColor = [UIColorblackColor];

[self.viewaddSubview:rightView];

CGFloat space_h =KDeviceHeight - kLineMaxY;

//底部view

UIView *downView = [[UIViewalloc] initWithFrame:CGRectMake(0,kLineMaxY, kDeviceWidth, space_h)];

downView.alpha =0.3;

downView.backgroundColor = [UIColorblackColor];

[self.viewaddSubview:downView];

//四个边角

UIImage *cornerImage = [UIImageimageNamed:@"QRCodeTopLeft"];

//左侧的view

UIImageView *leftView_image = [[UIImageViewalloc] initWithFrame:CGRectMake(CGRectGetMaxX(leftView.frame) - cornerImage.size.width /2.0, CGRectGetMaxY(upView.frame) - cornerImage.size.height / 2.0, cornerImage.size.width, cornerImage.size.height)];

leftView_image.image = cornerImage;

[self.viewaddSubview:leftView_image];

cornerImage = [UIImageimageNamed:@"QRCodeTopRight"];

//右侧的view

UIImageView *rightView_image = [[UIImageViewalloc] initWithFrame:CGRectMake(CGRectGetMinX(rightView.frame) - cornerImage.size.width /2.0, CGRectGetMaxY(upView.frame) - cornerImage.size.height / 2.0, cornerImage.size.width, cornerImage.size.height)];

rightView_image.image = cornerImage;

[self.viewaddSubview:rightView_image];

cornerImage = [UIImageimageNamed:@"QRCodebottomLeft"];

//底部view

UIImageView *downView_image = [[UIImageViewalloc] initWithFrame:CGRectMake(CGRectGetMaxX(leftView.frame) - cornerImage.size.width /2.0, CGRectGetMinY(downView.frame) - cornerImage.size.height / 2.0, cornerImage.size.width, cornerImage.size.height)];

downView_image.image = cornerImage;

//downView.backgroundColor = [UIColor blackColor];

[self.viewaddSubview:downView_image];

cornerImage = [UIImageimageNamed:@"QRCodebottomRight"];

UIImageView *downViewRight_image = [[UIImageViewalloc] initWithFrame:CGRectMake(CGRectGetMinX(rightView.frame) - cornerImage.size.width /2.0, CGRectGetMinY(downView.frame) - cornerImage.size.height / 2.0, cornerImage.size.width, cornerImage.size.height)];

downViewRight_image.image = cornerImage;

//downView.backgroundColor = [UIColor blackColor];

[self.viewaddSubview:downViewRight_image];

//说明label

UILabel *labIntroudction = [[UILabelalloc] init];

labIntroudction.backgroundColor = [UIColorclearColor];

labIntroudction.frame =CGRectMake(CGRectGetMaxX(leftView.frame),CGRectGetMinY(downView.frame) +25, kReaderViewWidth,20);

labIntroudction.textAlignment =NSTextAlignmentCenter;

labIntroudction.font = [UIFontboldSystemFontOfSize:13.0];

labIntroudction.textColor = [UIColorwhiteColor];

labIntroudction.text =@"将二维码置于框内,即可自动扫描";

[self.viewaddSubview:labIntroudction];

UIView *scanCropView = [[UIViewalloc] initWithFrame:CGRectMake(CGRectGetMaxX(leftView.frame) - 1,kLineMinY,self.view.frame.size.width - 2 * CGRectGetMaxX(leftView.frame) +2, kReaderViewHeight +2)];

scanCropView.layer.borderColor = [UIColorgreenColor].CGColor;

scanCropView.layer.borderWidth =2.0;

[self.viewaddSubview:scanCropView];

}

#pragma mark -

#pragma mark 输出代理方法

//此方法是在识别到QRCode，并且完成转换

//如果QRCode的内容越大，转换需要的时间就越长

- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection

{

//扫描结果

if (metadataObjects.count >0)

{

[selfstopSYQRCodeReading];

AVMetadataMachineReadableCodeObject *obj = metadataObjects[0];

if (obj.stringValue && ![obj.stringValueisEqualToString:@""] && obj.stringValue.length > 0)

{

NSLog(@"---------%@",obj.stringValue);

if ([obj.stringValuecontainsString:@"http"])

{

if (self.SYQRCodeSuncessBlock) {

self.SYQRCodeSuncessBlock(self,obj.stringValue);

}

else

{

if (self.SYQRCodeFailBlock) {

self.SYQRCodeFailBlock(self);

}

else

{

if (self.SYQRCodeFailBlock) {

self.SYQRCodeFailBlock(self);

}

else

{

if (self.SYQRCodeFailBlock) {

self.SYQRCodeFailBlock(self);

}

#pragma mark -

#pragma mark 交互事件

- (void)startSYQRCodeReading

{

_lineTimer = [NSTimerscheduledTimerWithTimeInterval:1.0 /20 target:selfselector:@selector(animationLine)userInfo:nilrepeats:YES];

[self.qrSessionstartRunning];

NSLog(@"start reading");

}

- (void)stopSYQRCodeReading

{

if (_lineTimer)

{

[_lineTimerinvalidate];

_lineTimer =nil;

}

[self.qrSessionstopRunning];

NSLog(@"stop reading");

}

//取消扫描

- (void)cancleSYQRCodeReading

{

[selfstopSYQRCodeReading];

if (self.SYQRCodeCancleBlock)

{

self.SYQRCodeCancleBlock(self);

}

NSLog(@"cancle reading");

}

#pragma mark -

#pragma mark 上下滚动交互线

- (void)animationLine

{

__blockCGRect frame = _line.frame;

staticBOOL flag = YES;

if (flag)

{

frame.origin.y =kLineMinY;

flag = NO;

[UIViewanimateWithDuration:1.0 /20 animations:^{

frame.origin.y +=5;

_line.frame = frame;

} completion:nil];

}

else

{

if (_line.frame.origin.y >= kLineMinY)

{

if (_line.frame.origin.y >= kLineMaxY - 12)

{

frame.origin.y =kLineMinY;

_line.frame = frame;

flag = YES;

}

else

{

[UIViewanimateWithDuration:1.0 /20 animations:^{

frame.origin.y +=5;

_line.frame = frame;

} completion:nil];

}

else

{

flag = !flag;

}

//NSLog(@"_line.frame.origin.y==%f",_line.frame.origin.y);

}

@end

//打开摄像头并扫描

- (IBAction)saomiaoAction:(id)sender

{

//扫描二维码

SYQRCodeViewController *qrcodevc = [[SYQRCodeViewControlleralloc] init];

qrcodevc.SYQRCodeSuncessBlock = ^(SYQRCodeViewController *aqrvc,NSString *qrString){

self.saomiaoLabel.text = qrString;

[aqrvc dismissViewControllerAnimated:NOcompletion:nil];

};

qrcodevc.SYQRCodeFailBlock = ^(SYQRCodeViewController *aqrvc){

self.saomiaoLabel.text =@"fail~";

[aqrvc dismissViewControllerAnimated:NOcompletion:nil];

};

qrcodevc.SYQRCodeCancleBlock = ^(SYQRCodeViewController *aqrvc){

[aqrvc dismissViewControllerAnimated:NOcompletion:nil];

self.saomiaoLabel.text =@"cancle~";

};

[selfpresentViewController:qrcodevcanimated:YEScompletion:nil];

}

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