//
// SYQRCodeViewController.h
// SYQRCodeDemo
//
// Created by sunbb on 15-1-9.
// Copyright (c) 2015年 SY. All rights reserved.
//
#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.
// Copyright (c) 2015年 SY. All rights reserved.
//
#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 const float kLineMinY = 185;
static const float kLineMaxY = 385;
static const float kReaderViewWidth = 200;
static const float 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
{
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor whiteColor];
[self initUI];
[self setOverlayPickerView];
[self startSYQRCodeReading];
[self initTitleView];
[self createBackBtn];
}
- (void)dealloc
{
if (_qrSession) {
[_qrSession stopRunning];
_qrSession = nil;
}
if (_qrVideoPreviewLayer) {
_qrVideoPreviewLayer = nil;
}
if (_line) {
_line = nil;
}
if (_lineTimer)
{
[_lineTimer invalidate];
_lineTimer = nil;
}
}
- (void)initTitleView
{
UIView *bgView = [[UIView alloc] initWithFrame:CGRectMake(0,0,kDeviceWidth, 64)];
bgView.backgroundColor = [UIColor colorWithRed:62.0/255 green:199.0/255 blue:153.0/255 alpha:1.0];
[self.view addSubview:bgView];
UILabel *titleLab = [[UILabel alloc] 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 = [UIColor lightGrayColor];
titleLab.shadowOffset = CGSizeMake(0, - 1);
titleLab.font = [UIFont boldSystemFontOfSize:18.0];
titleLab.textColor = [UIColor whiteColor];
titleLab.textAlignment = NSTextAlignmentCenter;
[self.view addSubview:titleLab];
}
- (void)createBackBtn
{
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
[btn setFrame:CGRectMake(20, 28, 60, 24)];
[btn setImage:[UIImage imageNamed:@"bar_back"] forState:UIControlStateNormal];
[btn addTarget:self action:@selector(cancleSYQRCodeReading) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
}
- (void)initUI
{
AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
//摄像头判断
NSError *error = nil;
AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error];
if (error)
{
NSLog(@"没有摄像头-%@", error.localizedDescription);
return;
}
//设置输出(Metadata元数据)
AVCaptureMetadataOutput *output = [[AVCaptureMetadataOutput alloc] 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:self queue:dispatch_get_main_queue()];
[output setRectOfInterest:[self getReaderViewBoundsWithSize:CGSizeMake(kReaderViewWidth, kReaderViewHeight)]];
//拍摄会话
AVCaptureSession *session = [[AVCaptureSession alloc] init];
// 读取质量，质量越高，可读取小尺寸的二维码
if ([session canSetSessionPreset:AVCaptureSessionPreset1920x1080])
{
[session setSessionPreset:AVCaptureSessionPreset1920x1080];
}
else if ([session canSetSessionPreset:AVCaptureSessionPreset1280x720])
{
[session setSessionPreset:AVCaptureSessionPreset1280x720];
}
else
{
[session setSessionPreset:AVCaptureSessionPresetPhoto];
}
if ([session canAddInput:input])
{
[session addInput:input];
}
if ([session canAddOutput: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 = [AVCaptureVideoPreviewLayer layerWithSession: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.layer insertSublayer:preview atIndex:0];
//[self.view.layer addSublayer:preview];
self.qrVideoPreviewLayer = preview;
self.qrSession = session;
}
- (CGRect)getReaderViewBoundsWithSize:(CGSize)asize
{
return CGRectMake(kLineMinY / KDeviceHeight, ((kDeviceWidth - asize.width) / 2.0) / kDeviceWidth, asize.height / KDeviceHeight, asize.width / kDeviceWidth);
}
- (void)setOverlayPickerView
{
//画中间的基准线
_line = [[UIImageView alloc] initWithFrame:CGRectMake((kDeviceWidth - 300) / 2.0, kLineMinY, 300, 12 * 300 / 320.0)];
[_line setImage:[UIImage imageNamed:@"QRCodeLine"]];
[self.view addSubview:_line];
//最上部view
UIView* upView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, kDeviceWidth, kLineMinY)];//80
upView.alpha = 0.3;
upView.backgroundColor = [UIColor blackColor];
[self.view addSubview:upView];
//左侧的view
UIView *leftView = [[UIView alloc] initWithFrame:CGRectMake(0, kLineMinY, (kDeviceWidth - kReaderViewWidth) / 2.0, kReaderViewHeight)];
leftView.alpha = 0.3;
leftView.backgroundColor = [UIColor blackColor];
[self.view addSubview:leftView];
//右侧的view
UIView *rightView = [[UIView alloc] initWithFrame:CGRectMake(kDeviceWidth - CGRectGetMaxX(leftView.frame), kLineMinY, CGRectGetMaxX(leftView.frame), kReaderViewHeight)];
rightView.alpha = 0.3;
rightView.backgroundColor = [UIColor blackColor];
[self.view addSubview:rightView];
CGFloat space_h = KDeviceHeight - kLineMaxY;
//底部view
UIView *downView = [[UIView alloc] initWithFrame:CGRectMake(0, kLineMaxY, kDeviceWidth, space_h)];
downView.alpha = 0.3;
downView.backgroundColor = [UIColor blackColor];
[self.view addSubview:downView];
//四个边角
UIImage *cornerImage = [UIImage imageNamed:@"QRCodeTopLeft"];
//左侧的view
UIImageView *leftView_image = [[UIImageView alloc] 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.view addSubview:leftView_image];
cornerImage = [UIImage imageNamed:@"QRCodeTopRight"];
//右侧的view
UIImageView *rightView_image = [[UIImageView alloc] 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.view addSubview:rightView_image];
cornerImage = [UIImage imageNamed:@"QRCodebottomLeft"];
//底部view
UIImageView *downView_image = [[UIImageView alloc] 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.view addSubview:downView_image];
cornerImage = [UIImage imageNamed:@"QRCodebottomRight"];
UIImageView *downViewRight_image = [[UIImageView alloc] 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.view addSubview:downViewRight_image];
//说明label
UILabel *labIntroudction = [[UILabel alloc] init];
labIntroudction.backgroundColor = [UIColor clearColor];
labIntroudction.frame = CGRectMake(CGRectGetMaxX(leftView.frame), CGRectGetMinY(downView.frame) + 25, kReaderViewWidth, 20);
labIntroudction.textAlignment = NSTextAlignmentCenter;
labIntroudction.font = [UIFont boldSystemFontOfSize:13.0];
labIntroudction.textColor = [UIColor whiteColor];
labIntroudction.text = @"将二维码置于框内,即可自动扫描";
[self.view addSubview:labIntroudction];
UIView *scanCropView = [[UIView alloc] initWithFrame:CGRectMake(CGRectGetMaxX(leftView.frame) - 1,kLineMinY,self.view.frame.size.width - 2 * CGRectGetMaxX(leftView.frame) + 2, kReaderViewHeight + 2)];
scanCropView.layer.borderColor = [UIColor greenColor].CGColor;
scanCropView.layer.borderWidth = 2.0;
[self.view addSubview: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)
{
[self stopSYQRCodeReading];
AVMetadataMachineReadableCodeObject *obj = metadataObjects[0];
if (obj.stringValue && ![obj.stringValue isEqualToString:@""] && obj.stringValue.length > 0)
{
NSLog(@"---------%@",obj.stringValue);
if ([obj.stringValue containsString:@"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 = [NSTimer scheduledTimerWithTimeInterval:1.0 / 20 target:self selector:@selector(animationLine) userInfo:nil repeats:YES];
[self.qrSession startRunning];
NSLog(@"start reading");
}
- (void)stopSYQRCodeReading
{
if (_lineTimer)
{
[_lineTimer invalidate];
_lineTimer = nil;
}
[self.qrSession stopRunning];
NSLog(@"stop reading");
}
//取消扫描
- (void)cancleSYQRCodeReading
{
[self stopSYQRCodeReading];
if (self.SYQRCodeCancleBlock)
{
self.SYQRCodeCancleBlock(self);
}
NSLog(@"cancle reading");
}
#pragma mark -
#pragma mark 上下滚动交互线
- (void)animationLine
{
__block CGRect frame = _line.frame;
static BOOL flag = YES;
if (flag)
{
frame.origin.y = kLineMinY;
flag = NO;
[UIView animateWithDuration: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
{
[UIView animateWithDuration: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 = [[SYQRCodeViewController alloc] init];
qrcodevc.SYQRCodeSuncessBlock = ^(SYQRCodeViewController *aqrvc,NSString *qrString){
self.saomiaoLabel.text = qrString;
[aqrvc dismissViewControllerAnimated:NO completion:nil];
};
qrcodevc.SYQRCodeFailBlock = ^(SYQRCodeViewController *aqrvc){
self.saomiaoLabel.text = @"fail~";
[aqrvc dismissViewControllerAnimated:NO completion:nil];
};
qrcodevc.SYQRCodeCancleBlock = ^(SYQRCodeViewController *aqrvc){
[aqrvc dismissViewControllerAnimated:NO completion:nil];
self.saomiaoLabel.text = @"cancle~";
};
[self presentViewController:qrcodevc animated:YES completion:nil];
}