二维码扫描加入手电筒的原生写法
...
#import "WMQRCodeViewController.h"
#import "SVProgressHUD.h"
#define kDeviceVersion [[UIDevice currentDevice].systemVersion floatValue]
#define kScreenWidth [UIScreen mainScreen].bounds.size.width
#define kScreenHeight [UIScreen mainScreen].bounds.size.height
#define kNavbarHeight ((kDeviceVersion>=7.0)?64:44)
#define IS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
#define IS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
#define kSCREEN_MAX_LENGTH (MAX(kScreenWidth, kScreenHeight))
#define kSCREEN_MIN_LENGTH (MIN(kScreenWidth, kScreenHeight))
#define IS_IPHONE4 (IS_IPHONE && kSCREEN_MAX_LENGTH <568.0)
#define IS_IPHONE5 (IS_IPHONE && kSCREEN_MAX_LENGTH ==568.0)
#define IS_IPHONE6 (IS_IPHONE && kSCREEN_MAX_LENGTH ==667.0)
#define IS_IPHONE6P (IS_IPHONE && kSCREEN_MAX_LENGTH ==736.0)
@importAVFoundation;
@interface WMQRCodeViewController (){
UILabel* introLab;
BOOLisLightOn;
UIButton*mineQRCode;
UIButton*theLightBtn;
BOOLhasTheVC;
BOOLisFirst;
BOOLupOrdown;
intnum;
AVCaptureVideoPreviewLayer *preView;
AVCaptureDevice*captureDevice;
NSTimer* timer;
}
@property (nonatomic,strong) AVCaptureSession *session;
@property (nonatomic,weak) AVCaptureMetadataOutput *output;
@property (nonatomic,retain) UIImageView *lineIV;
/** 扫描支持的编码格式的数组 */
@property(nonatomic,strong)NSMutableArray* metadataObjectTypes;
@end
@implementationWMQRCodeViewController
- (NSMutableArray*)metadataObjectTypes{
if (!_metadataObjectTypes) {
_metadataObjectTypes = [NSMutableArray arrayWithObjects:AVMetadataObjectTypeAztecCode, AVMetadataObjectTypeCode128Code, AVMetadataObjectTypeCode39Code, AVMetadataObjectTypeCode39Mod43Code, AVMetadataObjectTypeCode93Code, AVMetadataObjectTypeEAN13Code, AVMetadataObjectTypeEAN8Code, AVMetadataObjectTypePDF417Code, AVMetadataObjectTypeQRCode, AVMetadataObjectTypeUPCECode, nil];
// >= iOS 8
if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_7_1) {
[_metadataObjectTypes addObjectsFromArray:@[AVMetadataObjectTypeInterleaved2of5Code, AVMetadataObjectTypeITF14Code, AVMetadataObjectTypeDataMatrixCode]];
}
}
return _metadataObjectTypes;
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController*)picker{
[self dismissViewControllerAnimated:YES completion:^{
// [[UIApplication sharedApplication]setStatusBarStyle:UIStatusBarStyleDefault];
}];
}
- (void)navigationController:(UINavigationController*)navigationController willShowViewController:(UIViewController*)viewController animated:(BOOL)animated{
//[[UIApplication sharedApplication]setStatusBarStyle:UIStatusBarStyleDefault];
viewController.navigationItem.leftBarButtonItem.tintColor = [UIColor whiteColor];
viewController.navigationItem.rightBarButtonItem.tintColor = [UIColor whiteColor];
NSDictionary *attributeDic = [NSDictionary dictionaryWithObjectsAndKeys:[UIColor whiteColor], NSForegroundColorAttributeName, [UIFont systemFontOfSize:17.0], NSFontAttributeName, nil];
navigationController.navigationBar.titleTextAttributes= attributeDic;
}
- (void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary*)info {
UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];
if(!image) {
image = [infoobjectForKey:UIImagePickerControllerOriginalImage];
}
;
[self dismissViewControllerAnimated:NO completion:^{
//[[UIApplication sharedApplication]setStatusBarStyle:UIStatusBarStyleDefault];
}];
NSString*stringValue = [selfstringFromFileImage:image];
[selfcheckQRcode:stringValue];
}
- (void)rightBarButtonItemPressed:(UIButton*)sender {
// if (kDeviceVersion<=7.0) {
// }
// else {
// self.detector = [CIDetector detectorOfType:CIDetectorTypeQRCode context:nil options:@{ CIDetectorAccuracy : CIDetectorAccuracyHigh }];
// }
UIImagePickerController *pickCtr = [[UIImagePickerController alloc] init];
pickCtr.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
pickCtr.delegate=self;
pickCtr.allowsEditing=NO;
pickCtr.navigationBar.titleTextAttributes = [NSDictionary dictionaryWithObjectsAndKeys:[UIColor whiteColor], NSForegroundColorAttributeName, nil];
[self presentViewController:pickCtr animated:YES completion:^{
}];
NSArray *vcs = self.navigationController.viewControllers;
NSLog(@"vcs = %@",vcs);
}
-(void)initUI{
isFirst=YES;
upOrdown = NO;
num=0;
// 自定义导航右按钮
NSString *name = [@"Resource.bundle" stringByAppendingPathComponent:@"fromPhoto"];
UIImage*fromPhoto = [UIImageimageNamed:name];
UIButton *rightButton = [UIButton buttonWithType:UIButtonTypeCustom];
rightButton.frame=CGRectMake(0,0, fromPhoto.size.width, fromPhoto.size.height);
[rightButtonsetImage:fromPhoto forState:UIControlStateNormal];
[rightButtonsetImage:fromPhoto forState:UIControlStateSelected];
[rightButtonaddTarget:self action:@selector(rightBarButtonItemPressed:) forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithCustomView:rightButton];
}
- (void)startSessionRightNow:(NSNotification*)notification {
//[timer resumeTimer];
[self creatTimer];
[_session startRunning];
}
- (void)viewDidAppear:(BOOL)animated {
[superviewDidAppear:animated];
if(isFirst)
{
[selfcreatTimer];
[_session startRunning];
}
isFirst=NO;
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[self deleteTimer];
[[NSNotificationCenter defaultCenter]removeObserver:self name:@"startSession" object:nil];
}
- (void)viewDidDisappear:(BOOL)animated {
[superviewDidDisappear:animated];
}
#pragma mark - 删除timer
- (void)deleteTimer
{
if(timer) {
[timerinvalidate];
timer=nil;
}
}
#pragma mark - 创建timer
- (void)creatTimer
{
if(!timer) {
timer=[NSTimer scheduledTimerWithTimeInterval:0.02 target:self selector:@selector(animation) userInfo:nil repeats:YES];
}
}
- (void)viewWillAppear:(BOOL)animated {
[superviewWillAppear:animated];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(startSessionRightNow:) name:@"startSession" object:nil];
if(!isFirst) {
[selfcreatTimer];
[_session startRunning];
}
}
- (void)viewDidLoad {
self.navigationItem.title = @"扫一扫";
self.view.backgroundColor = [UIColor colorWithWhite:0.2 alpha:1];
[super viewDidLoad];
[selfinitUI];
[self setupDevice];
}
-(void)setupDevice{
//1.初始化捕捉设备（AVCaptureDevice），类型为AVMediaTypeVideo
captureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
NSError*error;
//2.用captureDevice创建输入流input
AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:captureDevice error:&error];
if(!input) {
NSLog(@"%@", [error localizedDescription]);
return;
}
//创建会话
_session = [[AVCaptureSession alloc] init];
[_session setSessionPreset:AVCaptureSessionPresetHigh];
if([_sessioncanAddInput:input]) {
[_sessionaddInput:input];
}
//预览视图
preView = [[AVCaptureVideoPreviewLayer alloc] initWithSession:_session];
//设置预览图层填充方式
[preView setVideoGravity:AVLayerVideoGravityResizeAspectFill];
preView.frame = CGRectMake(kNavbarHeight / 2, kNavbarHeight + 30, self.view.frame.size.width - kNavbarHeight, self.view.frame.size.width - kNavbarHeight);
[self.view.layer insertSublayer:preView atIndex:0];
//输出
AVCaptureMetadataOutput *output = [[AVCaptureMetadataOutput alloc] init];
[outputsetMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];
if([_sessioncanAddOutput:output]) {
[_sessionaddOutput:output];
}
self.output= output;
NSArray *arrTypes = output.availableMetadataObjectTypes;
NSLog(@"%@",arrTypes);
if ([_output.availableMetadataObjectTypes containsObject:AVMetadataObjectTypeQRCode] || [_output.availableMetadataObjectTypes containsObject:AVMetadataObjectTypeCode128Code]) {
output.metadataObjectTypes=self.metadataObjectTypes;
// [_session startRunning];
}else{
[_sessionstopRunning];
// rightButton.enabled = NO;
UIAlertView*alert = [[UIAlertViewalloc]initWithTitle:@"抱歉!"message:@"相机权限被拒绝，请前往设置-隐私-相机启用此应用的相机权限。"delegate:selfcancelButtonTitle:nilotherButtonTitles:@"确定",nil];
[alertshow];
return;
}
UIImageView *codeFrame = [[UIImageView alloc] initWithFrame:preView.frame];
codeFrame.contentMode = UIViewContentModeScaleAspectFit;
NSString *name = [@"Resource.bundle" stringByAppendingPathComponent:@"codeframe"];
[codeFramesetImage:[UIImageimageNamed:name]];
[self.viewaddSubview:codeFrame];
introLab = [[UILabel alloc] initWithFrame:CGRectMake(preView.frame.origin.x, preView.frame.origin.y + preView.frame.size.height, preView.frame.size.width, 40)];
introLab.numberOfLines = 1;
introLab.textAlignment = NSTextAlignmentCenter;
introLab.textColor = [UIColor whiteColor];
introLab.adjustsFontSizeToFitWidth = YES;
introLab.text = @"将二维码/条码放入框内，即可自动扫描";
[self.view addSubview:introLab];
//我的二维码按钮
mineQRCode = [UIButton buttonWithType:UIButtonTypeCustom];
mineQRCode.frame = CGRectMake(self.view.frame.size.width / 2 - 100 / 2, introLab.frame.origin.y+introLab.frame.size.height - 5, 100, introLab.frame.size.height);
[mineQRCode setTitle:@"我的二维码" forState:UIControlStateNormal];
[mineQRCode setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[mineQRCode addTarget:self action:@selector(showTheQRCodeOfMine:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:mineQRCode];
mineQRCode.hidden = YES;
//theLightBtn
theLightBtn = [UIButton buttonWithType:UIButtonTypeCustom];
theLightBtn.frame = CGRectMake(self.view.frame.size.width / 2 - 100 / 2, mineQRCode.frame.origin.y + mineQRCode.frame.size.height + 20, 100, introLab.frame.size.height);
NSString *lightName = [@"Resource.bundle" stringByAppendingPathComponent:@"light"];
NSString *lightonName = [@"Resource.bundle" stringByAppendingPathComponent:@"lighton"];
[theLightBtn setImage:[UIImage imageNamed:lightName] forState:UIControlStateNormal];
[theLightBtn setImage:[UIImage imageNamed:lightonName] forState:UIControlStateSelected];
[theLightBtn addTarget:self action:@selector(lightOnOrOff:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:theLightBtn];
if (![captureDevice isTorchAvailable]) {
theLightBtn.hidden=YES;
}
// Start
_lineIV = [[UIImageView alloc] initWithFrame:CGRectMake(preView.frame.origin.x, preView.frame.origin.y, preView.frame.size.width, 5)];
NSString *lineName = [@"Resource.bundle" stringByAppendingPathComponent:@"line"];
_lineIV.image= [UIImageimageNamed:lineName];
[self.view addSubview:_lineIV];
//开始扫描
[_session startRunning];
}
//手电筒🔦的开和关
- (void)lightOnOrOff:(UIButton*)sender {
sender.selected= !sender.selected;
isLightOn = 1 - isLightOn;
if (isLightOn) {
[selfturnOnLed:YES];
}
else{
[selfturnOffLed:YES];
}
}
//打开手电筒
- (void) turnOnLed:(bool)update {
[captureDevice lockForConfiguration:nil];
[captureDevice setTorchMode:AVCaptureTorchModeOn];
[captureDevice unlockForConfiguration];
}
//关闭手电筒
- (void) turnOffLed:(bool)update {
[captureDevice lockForConfiguration:nil];
[captureDevice setTorchMode: AVCaptureTorchModeOff];
[captureDevice unlockForConfiguration];
}
- (void)showTheQRCodeOfMine:(UIButton*)sender {
NSLog(@"showTheQRCodeOfMine");
}
- (void)animation {
if(upOrdown==NO) {
num++;
_lineIV.frame = CGRectMake(preView.frame.origin.x, preView.frame.origin.y + 2 * num, preView.frame.size.width, 5);
if (IS_IPHONE5||IS_IPHONE4) {
if(2*num==preView.frame.size.height) {
upOrdown=YES;
}
}
else{
if(2*num==preView.frame.size.height-3) {
upOrdown=YES;
}
}
}
else{
num--;
_lineIV.frame = CGRectMake(preView.frame.origin.x, preView.frame.origin.y + 2 * num, preView.frame.size.width, 5);
if(num==0) {
upOrdown=NO;
}
}
}
#pragma mark - AVCaptureMetadataOutputObjectsDelegate
- (void)captureOutput:(AVCaptureOutput*)captureOutput didOutputMetadataObjects:(NSArray*)metadataObjects fromConnection:(AVCaptureConnection*)connection
{
//判断是否有数据
if(metadataObjects !=nil&& [metadataObjectscount] >0) {
AVMetadataMachineReadableCodeObject*metadataObj = [metadataObjectsobjectAtIndex:0];
//判断回传的数据类型
if([[metadataObjtype]isEqualToString:AVMetadataObjectTypeQRCode]) {
NSLog(@"stringValue = %@",metadataObj.stringValue);
[selfcheckQRcode:metadataObj.stringValue];
}else{
NSLog(@"stringValue = %@",metadataObj.stringValue);
[selfcheckQRcode:metadataObj.stringValue];
}
}
[_session stopRunning];
[self performSelector:@selector(startReading) withObject:nil afterDelay:0.5];
}
-(void)startReading{
[_session startRunning];
}
-(void)stopReading{
[_session stopRunning];
}
/**
* 判断二维码
*/
- (void)checkQRcode:(NSString*)str{
if(str.length==0) {
UIAlertView*alert = [[UIAlertViewalloc]initWithTitle:@"找不到二维码"message:@"导入的图片里并没有找到二维码"delegate:selfcancelButtonTitle:@"确定"otherButtonTitles:nil];
[alertshow];
return;
}
if([strhasPrefix:@"http"]) {
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:str]];
}else{
//弹出一个view显示二维码内容
[SVProgressHUD showInfoWithStatus:str];
}
[SVProgressHUD dismissWithDelay:1.0];
}
/**
* 将二维码图片转化为字符
*/
- (NSString*)stringFromFileImage:(UIImage*)img{
intexifOrientation;
switch (img.imageOrientation) {
case UIImageOrientationUp:
exifOrientation =1;
break;
case UIImageOrientationDown:
exifOrientation =3;
break;
case UIImageOrientationLeft:
exifOrientation =8;
break;
case UIImageOrientationRight:
exifOrientation =6;
break;
case UIImageOrientationUpMirrored:
exifOrientation =2;
break;
case UIImageOrientationDownMirrored:
exifOrientation =4;
break;
case UIImageOrientationLeftMirrored:
exifOrientation =5;
break;
case UIImageOrientationRightMirrored:
exifOrientation =7;
break;
default:
break;
}
NSDictionary *detectorOptions = @{ CIDetectorAccuracy : CIDetectorAccuracyHigh }; // TODO: read doc for more tuneups
CIDetector*detector = [CIDetectordetectorOfType:CIDetectorTypeQRCodecontext:niloptions:detectorOptions];
NSArray*features = [detectorfeaturesInImage:[CIImageimageWithCGImage:img.CGImage]];
CIQRCodeFeature* qrStr = (CIQRCodeFeature *)features.firstObject;
//只返回第一个扫描到的二维码
return qrStr.messageString;
}
-(void)dealloc{
NSLog(@"%@ dealloc",NSStringFromClass(self.class));
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
@end
...
demo点击 别忘了给个star
