iOS 封装原生二维码扫描和生成

功能描述:WSLNativeScanTool是在利用原生API的条件下封装的二维码扫描工具，支持二维码的扫描、识别图中二维码、生成自定义颜色和中心图标的二维码、监测环境亮度、打开闪光灯这些功能；WSLScanView是参照微信封装的一个扫一扫界面，支持线条颜色、大小、动画图片、矩形扫描框样式的自定义；这个示例本身就是仿照微信的扫一扫功能实现的。

• 详细实现就不在此唠叨了，直接去看代码吧，注释详细是我的习惯😀→WSLNativeScanTool
• 来看一下WSLNativeScanTool.h ，用法很明朗

@import UIKit;
@import AVFoundation;

#import <Foundation/Foundation.h>

/**
扫描完成的回调
@param scanString 扫描出的字符串
*/
typedef void(^WSLScanFinishedBlock)( NSString * _Nullable scanString);

/**
监听环境光感的回调
@param brightness 亮度值
*/
typedef void(^WSLMonitorLightBlock)( float brightness);

@interface WSLNativeScanTool : NSObject

/**
扫描出结果后的回调 ，注意循环引用的问题
*/
@property (nonatomic, copy) WSLScanFinishedBlock _Nullable scanFinishedBlock;

/**
监听环境光感的回调,如果 != nil 表示开启监测环境亮度功能
*/
@property (nonatomic, copy) WSLMonitorLightBlock _Nullable monitorLightBlock;

/**
闪光灯的状态,不需要设置，仅供外边判断状态使用
*/
@property (nonatomic, assign) BOOL flashOpen;

/**
初始化 扫描工具
@param preview 展示输出流的视图
@param scanFrame 扫描中心识别区域范围
*/
- (instancetype )initWithPreview:(UIView *)preview andScanFrame:(CGRect)scanFrame;

/**
闪光灯开关
*/
- (void)openFlashSwitch:(BOOL)open;

- (void)sessionStartRunning;

- (void)sessionStopRunning;

/**
识别图中二维码
*/
- (void)scanImageQRCode:(UIImage *_Nullable)imageCode;

/**
生成自定义样式二维码
注意：有些颜色结合生成的二维码识别不了
@param codeString 字符串
@param size 大小
@param backColor 背景色
@param frontColor 前景色
@param centerImage 中心图片
@return image二维码
*/
+ (UIImage *)createQRCodeImageWithString:(nonnull NSString *)codeString andSize:(CGSize)size andBackColor:(nullable UIColor *)backColor andFrontColor:(nullable UIColor *)frontColor andCenterImage:(nullable UIImage *)centerImage;

• 再来看一下WSLScanView.h,用法也明朗😁

//
//  WSLScanView.h
//  ScanQRcode
//
//  Created by 王双龙 on 2018/2/28.
//  Copyright © 2018年 https://www.jianshu.com/u/e15d1f644bea
All rights reserved.
//

#import <UIKit/UIKit.h>

typedef void(^WSLMyQRCodeBlock)(void);

typedef void(^WSLFlashSwitchBlock)(BOOL open);

@interface WSLScanView : UIView

/**
点击我的二维码的回调
*/
@property (nonatomic,copy) WSLMyQRCodeBlock myQRCodeBlock;

/**
打开/关闭闪光灯的回调
*/
@property (nonatomic,copy) WSLFlashSwitchBlock flashSwitchBlock;

#pragma mark - 扫码区域

/**
扫码区域 默认为正方形,x = 60, y = 100
*/
@property (nonatomic,assign)CGRect scanRetangleRect;
/**
@brief  是否需要绘制扫码矩形框，默认YES
*/
@property (nonatomic, assign) BOOL isNeedShowRetangle;
/**
@brief  矩形框线条颜色
*/
@property (nonatomic, strong, nullable) UIColor *colorRetangleLine;

#pragma mark - 矩形框(扫码区域)周围4个角

//4个角的颜色
@property (nonatomic, strong, nullable) UIColor* colorAngle;
//扫码区域4个角的宽度和高度 默认都为20
@property (nonatomic, assign) CGFloat photoframeAngleW;
@property (nonatomic, assign) CGFloat photoframeAngleH;
/**
@brief  扫码区域4个角的线条宽度,默认6
*/
@property (nonatomic, assign) CGFloat photoframeLineW;

#pragma mark --动画效果

/**
*  动画效果的图像
*/
@property (nonatomic,strong, nullable) UIImage * animationImage;
/**
非识别区域颜色,默认 RGBA (0,0,0,0.5)
*/
@property (nonatomic, strong, nullable) UIColor * notRecoginitonArea;

/**
*  开始扫描动画
*/
- (void)startScanAnimation;
/**
*  结束扫描动画
*/
- (void)stopScanAnimation;

/**
正在处理扫描到的结果
*/
- (void)handlingResultsOfScan;

/**
完成扫描结果处理
*/
- (void)finishedHandle;

/**
是否显示闪光灯开关
@param show YES or NO
*/
- (void)showFlashSwitch:(BOOL)show;
@end

用法

• 实例化WSLNativeScanTool和WSLScanView

//输出流视图
UIView *preview  = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height - 0)];
[self.view addSubview:preview];

__weak typeof(self) weakSelf = self;

//构建扫描样式视图
_scanView = [[WSLScanView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height - 0)];
_scanView.scanRetangleRect = CGRectMake(60, 120, (self.view.frame.size.width - 2 * 60),  (self.view.frame.size.width - 2 * 60));
_scanView.colorAngle = [UIColor greenColor];
_scanView.photoframeAngleW = 20;
_scanView.photoframeAngleH = 20;
_scanView.photoframeLineW = 2;
_scanView.isNeedShowRetangle = YES;
_scanView.colorRetangleLine = [UIColor whiteColor];
_scanView.notRecoginitonArea = [UIColor colorWithRed:0 green:0 blue:0 alpha:0.5];
_scanView.animationImage = [UIImage imageNamed:@"scanLine"];
_scanView.myQRCodeBlock = ^{
[WSLNativeScanTool createQRCodeImageWithString:@"https://www.jianshu.com/u/e15d1f644bea" andSize:CGSizeMake(250, 250) andBackColor:[UIColor whiteColor] andFrontColor:[UIColor orangeColor] andCenterImage:[UIImage imageNamed:@"piao"]];
createQRCodeController.qrString = @"https://www.jianshu.com/u/e15d1f644bea";
};
_scanView.flashSwitchBlock = ^(BOOL open) {
[weakSelf.scanTool openFlashSwitch:open];
};
[self.view addSubview:_scanView];

//初始化扫描工具
_scanTool = [[WSLNativeScanTool alloc] initWithPreview:preview andScanFrame:_scanView.scanRetangleRect];
_scanTool.scanFinishedBlock = ^(NSString *scanString) {
NSLog(@"扫描结果 %@",scanString);
[weakSelf.scanTool sessionStopRunning];
[weakSelf.scanTool openFlashSwitch:NO];
};
_scanTool.monitorLightBlock = ^(float brightness) {
NSLog(@"环境光感 ： %f",brightness);
if (brightness < 0) {
// 环境太暗，显示闪光灯开关按钮
[weakSelf.scanView showFlashSwitch:YES];
}else if(brightness > 0){
// 环境亮度可以,且闪光灯处于关闭状态时，隐藏闪光灯开关
if(!weakSelf.scanTool.flashOpen){
[weakSelf.scanView showFlashSwitch:NO];
}
}
};
[_scanTool sessionStartRunning];
[_scanView startScanAnimation];

好了到此结束，告辞~ 需要的瞅这里→WSLNativeScanTool