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72 lines
3.4 KiB
72 lines
3.4 KiB
1 year ago
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// SGGenerateQRCode.m
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// SGQRCodeExample
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//
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// Created by kingsic on 2021/7/5.
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// Copyright © 2021 kingsic. All rights reserved.
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//
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#import "SGGenerateQRCode.h"
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@implementation SGGenerateQRCode
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+ (UIImage *)generateQRCodeWithData:(NSString *)data size:(CGFloat)size {
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return [self generateQRCodeWithData:data size:size color:[UIColor blackColor] backgroundColor:[UIColor whiteColor]];
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}
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+ (UIImage *)generateQRCodeWithData:(NSString *)data size:(CGFloat)size color:(UIColor *)color backgroundColor:(UIColor *)backgroundColor {
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NSData *string_data = [data dataUsingEncoding:NSUTF8StringEncoding];
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// 1、二维码滤镜
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CIFilter *fileter = [CIFilter filterWithName:@"CIQRCodeGenerator"];
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[fileter setValue:string_data forKey:@"inputMessage"];
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[fileter setValue:@"H" forKey:@"inputCorrectionLevel"];
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CIImage *ciImage = fileter.outputImage;
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// 2、颜色滤镜
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CIFilter *color_filter = [CIFilter filterWithName:@"CIFalseColor"];
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[color_filter setValue:ciImage forKey:@"inputImage"];
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[color_filter setValue:[CIColor colorWithCGColor:color.CGColor] forKey:@"inputColor0"];
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[color_filter setValue:[CIColor colorWithCGColor:backgroundColor.CGColor] forKey:@"inputColor1"];
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// 3、生成处理
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CIImage *outImage = color_filter.outputImage;
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CGFloat scale = size / outImage.extent.size.width;
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outImage = [outImage imageByApplyingTransform:CGAffineTransformMakeScale(scale, scale)];
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return [UIImage imageWithCIImage:outImage];
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}
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+ (UIImage *)generateQRCodeWithData:(NSString *)data size:(CGFloat)size logoImage:(UIImage *)logoImage ratio:(CGFloat)ratio {
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return [self generateQRCodeWithData:data size:size logoImage:logoImage ratio:ratio logoImageCornerRadius:5 logoImageBorderWidth:5 logoImageBorderColor:[UIColor whiteColor]];
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}
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+ (UIImage *)generateQRCodeWithData:(NSString *)data size:(CGFloat)size logoImage:(UIImage *)logoImage ratio:(CGFloat)ratio logoImageCornerRadius:(CGFloat)logoImageCornerRadius logoImageBorderWidth:(CGFloat)logoImageBorderWidth logoImageBorderColor:(UIColor *)logoImageBorderColor {
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UIImage *image = [self generateQRCodeWithData:data size:size color:[UIColor blackColor] backgroundColor:[UIColor whiteColor]];
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if (logoImage == nil) return image;
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if (ratio < 0.0 || ratio > 0.5) {
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ratio = 0.25;
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}
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CGFloat logoImageW = ratio * size;
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CGFloat logoImageH = logoImageW;
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CGFloat logoImageX = 0.5 * (image.size.width - logoImageW);
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CGFloat logoImageY = 0.5 * (image.size.height - logoImageH);
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CGRect logoImageRect = CGRectMake(logoImageX, logoImageY, logoImageW, logoImageH);
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// 绘制logo
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UIGraphicsBeginImageContextWithOptions(image.size, false, [UIScreen mainScreen].scale);
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[image drawInRect:CGRectMake(0, 0, image.size.width, image.size.height)];
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if (logoImageCornerRadius < 0.0 || logoImageCornerRadius > 10) {
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logoImageCornerRadius = 5;
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}
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UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:logoImageRect cornerRadius:logoImageCornerRadius];
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if (logoImageBorderWidth < 0.0 || logoImageBorderWidth > 10) {
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logoImageBorderWidth = 5;
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}
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path.lineWidth = logoImageBorderWidth;
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[logoImageBorderColor setStroke];
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[path stroke];
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[path addClip];
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[logoImage drawInRect:logoImageRect];
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UIImage *QRCodeImage = UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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return QRCodeImage;
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}
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@end
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