iOS 仿微信二维码条码扫描

 在 iOS 开发中，我们经常会使用扫描二维码/条形码功能，为了提高开发效率和方便大家使用，我自己写一个 DYFCodeScanner 类，先来看看效果：

效果图

Code Scanner Preview

 DYFCodeScanner具有二维码和条码扫描功能，有一套自定义的扫描动画以及界面，支持相机缩放，还可以生成和识别二维码，使用起来很方便。

安装

• 支持通过 CocoaPods 安装。

# Install lastest version.
pod 'DYFCodeScanner'

#pod 'DYFCodeScanner', '~> 1.0.1'

 接下来一起阅读它的使用说明：

使用说明

• 添加隐私 (Add Privacy)

Camera Photo Privacy

<key>NSCameraUsageDescription</key>
<string>扫描二维码/条形码，允许App访问您的相机？</string>
<key>NSPhotoLibraryAddUsageDescription</key>
<string>存取照片，允许App访问您的相册？</string>
<key>NSPhotoLibraryUsageDescription</key>
<string>存取照片，允许App访问您的相册？</string>

• 导入头文件 (Import Header)

#import "DYFCodeScanner.h"

• 扫描二维码/条形码 (Scanning QR code / Barcode)

 支持push和模态两种场景过渡。 (Supporting push or modal transition.)

 根据项目的需求，选择之一即可。(According to the needs of the project, you can choose one of them.)

 当你要推进视图控制器，你可以选择隐藏或者不隐藏导航条。(When you want to push the view controller, you can choose to or not to hide the navigation bar.)

- (IBAction)scan:(id)sender {
    static BOOL shouldPush      = YES;
    static BOOL naviBarHidden   = YES;

    DYFCodeScannerViewController *codesVC = [[DYFCodeScannerViewController alloc] init];
    codesVC.scanType            = DYFCodeScannerTypeAll;
    codesVC.navigationTitle     = @"二维码/条形码";
    codesVC.tipString           = [NSString stringWithFormat:@"将二维码/条形码放入框内，即自动扫描"];
    codesVC.resultHandler       = ^(BOOL result, NSString *stringValue) {
        if (result) {
            [self showResult:stringValue];
        } else {
            NSLog(@"QRCode Message: %@", stringValue);
        }
    };

    if (shouldPush) {
        codesVC.navigationBarHidden = naviBarHidden = !naviBarHidden;
        [self.navigationController pushViewController:codesVC animated:YES];
    } else {
        [self presentViewController:codesVC animated:YES completion:NULL];
    }

    shouldPush = !shouldPush;
}

- (void)showResult:(NSString *)value {
    if (self.m_textView.text.length > 0) {
        self.m_textView.text = @"";
    }
    self.m_textView.text = value;
}

• 生成二维码 (Generating QR code)

1. 生成带中心图像的二维码 (Generating QR code that contains center image)

- (IBAction)generateQRCode:(id)sender {
    CGRect rect = self.qrc_imageView.frame;
    DYFQRCodeImageView *imageView = [DYFQRCodeImageView createWithFrame:rect stringValue:@"http://img.shields.io/cocoapods/v/DYFAssistiveTouchView.svg?style=flat" centerImage:[UIImage imageNamed:@"cat49334.jpg"]];
    self.qrc_imageView.image = imageView.image;
}

2. 生成带颜色的二维码 (Generating QR code that contains backgroudColor and foregroudColor)

- (IBAction)generateColorQRCode:(id)sender {
    CGRect rect = self.cqrc_imageView.frame;
    DYFQRCodeImageView *imageView = [DYFQRCodeImageView createWithFrame:rect stringValue:@"http://img.shields.io/cocoapods/p/DYFAssistiveTouchView.svg?style=flat" backgroudColor:[UIColor grayColor] foregroudColor:[UIColor greenColor]];
    self.cqrc_imageView.image = imageView.image;
}

3. 生成带中心图像颜色的二维码 (Generating QR code that contains center image, backgroudColor and foregroudColor)

DYFQRCodeImageView *imageView = [DYFQRCodeImageView createWithFrame:CGRectMake(30, 88, 200, 200) stringValue:@"https://github.com/dgynfi/DYFAuthIDAndGestureLock" backgroudColor:[UIColor grayColor] foregroudColor:[UIColor greenColor] centerImage:[UIImage imageNamed:@"cat49334.jpg"]];
[self.view addSubview:imageView];

• 识别二维码 (Recognizing QR code)

- (void)recognizeQRCode:(UILongPressGestureRecognizer *)recognizer {
    UIImage *qrcodeImage = ((DYFQRCodeImageView *)recognizer.view).image;
    NSString *stringValue = [qrcodeImage yf_stringValue];
    #if DEBUG
        NSLog(@"stringValue: %@", stringValue);
    #endif
}

Sample Codes

• Sample Codes Gateway

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