iOS 扫一扫功能实现.docx
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iOS扫一扫功能实现
iOS扫一扫功能实现
下面贴上代码：
AppDelegate.m：
[objc]viewplaincopy在CODE上查看代码片派生到我的代码片
-（BOOL）application:
（UIApplication*）applicationdidFinishLaunchingWithOptions:
（NSDictionary*）launchOptions{
self.window=[[UIWindowalloc]initWithFrame:
[[UIScreenmainScreen]bounds]];
self.window.rootViewController=[[UINavigationControlleralloc]initWithRootViewController:
[[ViewControlleralloc]init]];
self.window.backgroundColor=[UIColorwhiteColor];
[self.windowmakeKeyAndVisible];
returnYES;
}
ViewController：
[objc]viewplaincopy在CODE上查看代码片派生到我的代码片
#import
@interfaceViewController:
UIViewController
@end
/***---------------分割线---------------***/
#import"ViewController.h"
#import"HWScanViewController.h"
@implementationViewController
-（void）viewDidLoad{
[superviewDidLoad];
self.view.backgroundColor=[UIColorwhiteColor];
//创建控件
[selfcreatControl];
}
-（void）creatControl
{
//扫一扫按钮
UIButton*scanBtn=[[UIButtonalloc]initWithFrame:
CGRectMake（100,100,100,44）];
scanBtn.backgroundColor=[UIColororangeColor];
[scanBtnsetTitle:
@"扫一扫"forState:
UIControlStateNormal];
[scanBtnaddTarget:
selfaction:
@selector（scanBtnOnClick）forControlEvents:
UIControlEventTouchUpInside];
[self.viewaddSubview:
scanBtn];
}
-（void）scanBtnOnClick
{
HWScanViewController*vc=[[HWScanViewControlleralloc]init];
[self.navigationControllerpushViewController:
vcanimated:
YES];
}
@end
HWScanViewController：
[objc]viewplaincopy在CODE上查看代码片派生到我的代码片
#import
@interfaceHWScanViewController:
UIViewController
@end
/***---------------分割线---------------***/
#import"HWScanViewController.h"
#import
#defineKMainW[UIScreenmainScreen].bounds.size.width
#defineKMainH[UIScreenmainScreen].bounds.size.height
@interfaceHWScanViewController（）
@property（nonatomic,strong）NSTimer*timer;
@property（nonatomic,strong）AVCaptureDevice*device;
@property（nonatomic,strong）AVCaptureSession*session;
@property（nonatomic,strong）AVCaptureVideoPreviewLayer*preview;
@property（nonatomic,weak）UIImageView*line;
@property（nonatomic,assign）NSIntegerdistance;
@end
@implementationHWScanViewController
-（void）viewDidLoad{
[superviewDidLoad];
//初始化信息
[selfinitInfo];
//创建控件
[selfcreatControl];
//设置参数
[selfsetupCamera];
//添加定时器
[selfaddTimer];
}
-（void）viewWillDisappear:
（BOOL）animated
{
[superviewWillDisappear:
animated];
[selfstopScanning];
}
-（void）initInfo
{
//背景色
self.view.backgroundColor=[UIColorblackColor];
//导航标题
self.navigationItem.title=@"二维码/条形码";
//导航右侧相册按钮
self.navigationItem.rightBarButtonItem=[[UIBarButtonItemalloc]initWithTitle:
@"相册"style:
UIBarButtonItemStylePlaintarget:
selfaction:
@selector（photoBtnOnClick）];
}
-（void）creatControl
{
CGFloatscanW=KMainW*0.65;
CGFloatpadding=10.0f;
CGFloatlabelH=20.0f;
CGFloattabBarH=64.0f;
CGFloatcornerW=26.0f;
CGFloatmarginX=（KMainW-scanW）*0.5;
CGFloatmarginY=（KMainH-scanW-padding-labelH）*0.5;
//遮盖视图
for（inti=0;i<4;i++）{
UIView*cover=[[UIViewalloc]initWithFrame:
CGRectMake（0,（marginY+scanW）*i,KMainW,marginY+（padding+labelH）*i）];
if（i==2||i==3）{
cover.frame=CGRectMake（（marginX+scanW）*（i-2）,marginY,marginX,scanW）;
}
cover.backgroundColor=[[UIColorblackColor]colorWithAlphaComponent:
0.5f];
[self.viewaddSubview:
cover];
}
//扫描视图
UIView*scanView=[[UIViewalloc]initWithFrame:
CGRectMake（marginX,marginY,scanW,scanW）];
[self.viewaddSubview:
scanView];
//扫描线
UIImageView*line=[[UIImageViewalloc]initWithFrame:
CGRectMake（0,0,scanW,2）];
[selfdrawLineForImageView:
line];
[scanViewaddSubview:
line];
self.line=line;
//边框
UIView*borderView=[[UIViewalloc]initWithFrame:
CGRectMake（0,0,scanW,scanW）];
borderView.layer.borderColor=[[UIColorwhiteColor]CGColor];
borderView.layer.borderWidth=1.0f;
[scanViewaddSubview:
borderView];
//扫描视图四个角
for（inti=0;i<4;i++）{
CGFloatimgViewX=（scanW-cornerW）*（i%2）;
CGFloatimgViewY=（scanW-cornerW）*（i/2）;
UIImageView*imgView=[[UIImageViewalloc]initWithFrame:
CGRectMake（imgViewX,imgViewY,cornerW,cornerW）];
if（i==0||i==1）{
imgView.transform=CGAffineTransformRotate（imgView.transform,M_PI_2*i）;
}else{
imgView.transform=CGAffineTransformRotate（imgView.transform,-M_PI_2*（i-1））;
}
[selfdrawImageForImageView:
imgView];
[scanViewaddSubview:
imgView];
}
//提示标签
UILabel*label=[[UILabelalloc]initWithFrame:
CGRectMake（0,CGRectGetMaxY（scanView.frame）+padding,KMainW,labelH）];
label.text=@"将二维码/条形码放入框内，即可自动扫描";
label.font=[UIFontsystemFontOfSize:
16.0f];
label.textAlignment=NSTextAlignmentCenter;
label.textColor=[UIColorwhiteColor];
[self.viewaddSubview:
label];
//选项栏
UIView*tabBarView=[[UIViewalloc]initWithFrame:
CGRectMake（0,KMainH-tabBarH,KMainW,tabBarH）];
tabBarView.backgroundColor=[[UIColorblackColor]colorWithAlphaComponent:
0.8f];
[self.viewaddSubview:
tabBarView];
//开启照明按钮
UIButton*lightBtn=[[UIButtonalloc]initWithFrame:
CGRectMake（KMainW-100,0,100,tabBarH）];
lightBtn.titleLabel.font=[UIFontsystemFontOfSize:
16.0f];
[lightBtnsetTitle:
@"开启照明"forState:
UIControlStateNormal];
[lightBtnsetTitle:
@"关闭照明"forState:
UIControlStateSelected];
[lightBtnaddTarget:
selfaction:
@selector（lightBtnOnClick:
）forControlEvents:
UIControlEventTouchUpInside];
[tabBarViewaddSubview:
lightBtn];
}
-（void）setupCamera
{
dispatch_async（dispatch_get_global_queue（DISPATCH_QUEUE_PRIORITY_DEFAULT,0）,^{
//初始化相机设备
_device=[AVCaptureDevicedefaultDeviceWithMediaType:
AVMediaTypeVideo];
//初始化输入流
AVCaptureDeviceInput*input=[AVCaptureDeviceInputdeviceInputWithDevice:
_deviceerror:
nil];
//初始化输出流
AVCaptureMetadataOutput*output=[[AVCaptureMetadataOutputalloc]init];
//设置代理，主线程刷新
[outputsetMetadataObjectsDelegate:
selfqueue:
dispatch_get_main_queue（）];
//初始化链接对象
_session=[[AVCaptureSessionalloc]init];
//高质量采集率
[_sessionsetSessionPreset:
AVCaptureSessionPresetHigh];
if（[_sessioncanAddInput:
input]）[_sessionaddInput:
input];
if（[_sessioncanAddOutput:
output]）[_sessionaddOutput:
output];
//条码类型（二维码/条形码）
output.metadataObjectTypes=[NSArrayarrayWithObjects:
AVMetadataObjectTypeEAN13Code,AVMetadataObjectTypeEAN8Code,AVMetadataObjectTypeCode128Code,AVMetadataObjectTypeQRCode,nilnil];
//更新界面
dispatch_async（dispatch_get_main_queue（）,^{
_preview=[AVCaptureVideoPreviewLayerlayerWithSession:
_session];
_preview.videoGravity=AVLayerVideoGravityResizeAspectFill;
_preview.frame=CGRectMake（0,0,KMainW,KMainH）;
[self.view.layerinsertSublayer:
_previewatIndex:
0];
[_sessionstartRunning];
}）;
}）;
}
-（void）addTimer
{
_distance=0;
self.timer=[NSTimerscheduledTimerWithTimeInterval:
0.01ftarget:
selfselector:
@selector（timerAction）userInfo:
nilrepeats:
YES];
[[NSRunLoopmainRunLoop]addTimer:
self.timerforMode:
NSRunLoopCommonModes];
}
-（void）timerAction
{
if（_distance++>KMainW*0.65）_distance=0;
_line.frame=CGRectMake（0,_distance,KMainW*0.65,2）;
}
-（void）removeTimer
{
[_timerinvalidate];
_timer=nil;
}
//照明按钮点击事件
-（void）lightBtnOnClick:
（UIButton*）btn
{
//判断是否有闪光灯
if（!
[_devicehasTorch]）{
[selfshowAlertWithTitle:
@"当前设备没有闪光灯，无法开启照明功能"message:
nilsureHandler:
nilcancelHandler:
nil];
return;
}
btn.selected=!
btn.selected;
[_devicelockForConfiguration:
nil];
if（btn.selected）{
[_devicesetTorchMode:
AVCaptureTorchModeOn];
}else{
[_devicesetTorchMode:
AVCaptureTorchModeOff];
}
[_deviceunlockForConfiguration];
}
//进入相册
-（void）photoBtnOnClick
{
if（[UIImagePickerControllerisSourceTypeAvailable:
UIImagePickerControllerSourceTypePhotoLibrary]）{
UIImagePickerController*controller=[[UIImagePickerControlleralloc]init];
controller.sourceType=UIImagePickerControllerSourceTypePhotoLibrary;
controller.delegate=lf;
[selfpresentViewController:
controlleranimated:
YEScompletion:
nil];
}else{
[selfshowAlertWithTitle:
@"当前设备不支持访问相册"message:
nilsureHandler:
nilcancelHandler:
nil];
}
}
#pragmamark-AVCaptureMetadataOutputObjectsDelegate
-（void）captureOutput:
（AVCaptureOutput*）captureOutputdidOutputMetadataObjects:
（NSArray*）metadataObjectsfromConnection:
（AVCaptureConnection*）connection
{
//扫描完成
if（[metadataObjectscount]>0）{
//停止扫描
[selfstopScanning];
//显示结果
[selfshowAlertWithTitle:
@"扫描结果"message:
[[metadataObjectsfirstObject]stringValue]sureHandler:
nilcancelHandler:
nil];
}
}
-（void）stopScanning
{
[_sessionstopRunning];
_session=nil;
[_previewremoveFromSuperlayer];
[selfremoveTimer];
}
#pragmamark-UIImagePickerControllrDelegate
-（void）imagePickerController:
（UIImagePickerController*）pickerdidFinishPickingMediaWithInfo:
（NSDictionary*）info
{
[pickerdismissViewControllerAnimated:
YEScompletion:
^{
//获取相册图片
UIImage*image=info[UIImagePickerControllerOriginalImage];
//识别图片
CIDetector*detector=[CIDetectordetectorOfType:
CIDetectorTypeQRCodecontext:
niloptions:
@{CIDetectorAccuracy:
CIDetectorAccuracyHigh}];
NSArray*features=[detectorfeaturesInImage:
[CIImageimageWithCGImage:
image.CGImage]];
//识别结果
if（features.cou
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