使用系统API（AVFoundation）进行封装，包含UI界面以及对二维码，条形码进行扫描，生成等操作
- 创建sessionManager,同时需要设置扫描类型、扫描区域等
- (instancetype)initWithAVCaptureQuality:(AVCaptureQuality)quality
AVCaptureType:(AVCaptureType)type
scanRect:(CGRect)scanRect
successBlock:(SuccessBlock)success;- 显示View
- (void)showPreviewLayerInView:(UIView *)view;- 扫描音效
@property(assign, nonatomic) BOOL isPlaySound;
@property(copy, nonatomic) NSString *soundName;- 开启闪光灯
- (void)turnTorch:(BOOL)state;- 扫描相册中的二维码
- (void)scanPhotoWith:(UIImage *)image successBlock:(SuccessBlock)success;- 权限监测
+ (void)checkAuthorizationStatusForCameraWithGrantBlock:(void(^)())grant
DeniedBlock:(void(^)())denied;- 创建普通二维码
UIImage *image = [UIImage createQRCodeWithSize:200 dataString:@"hello"];- 自定义二维码
UIImage *icon = [UIImage imageNamed:@"bigMax"];
UIImage *image = [UIImage createQRCodeWithSize:200
dataString:@"hello"
QRCodeImageType:circularImage
iconImage:icon
iconImageSize:40];由于iOS10权限设置变换，需要在项目中的info.plist文件中添加如下文件
<key>NSCameraUsageDescription</key>
<string></string>
<key>NSPhotoLibraryUsageDescription</key>
<string></string>
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