ZBar 應(yīng)該沒(méi)有 生成二維碼的功能。
正好之前班獸分享過(guò)一個(gè)生成二維碼的功能 拿過(guò)來(lái)看看。
首先添加依賴
然后
import <CoreImage/CoreImage.h>
然后.m實(shí)現(xiàn)
+(CIImage)getQRCodeCIImageWithString:(NSString)string {
// 1.創(chuàng)建過(guò)濾器
CIFilter *filter = [CIFilter filterWithName:@"CIQRCodeGenerator"];
// 2.恢復(fù)默認(rèn)
[filter setDefaults];
// 3.給過(guò)濾器添加數(shù)據(jù)(正則表達(dá)式/賬號(hào)和密碼)
NSString *dataString = string;
NSData *data = [dataString dataUsingEncoding:NSUTF8StringEncoding];
[filter setValue:data forKeyPath:@"inputMessage"];
// 4.獲取輸出的二維碼
CIImage *outputImage = [filter outputImage];
return outputImage;
}
+(UIImage)getQRCodeimageWithStrting:(NSString)string andImageWidth:(CGFloat)width {
//因?yàn)樯傻亩S碼模糊，所以通過(guò)createNonInterpolatedUIImageFormCIImage:outputImage來(lái)獲得高清的二維碼圖片
return [self createNonInterpolatedUIImageFormCIImage:[self getQRCodeCIImageWithString:string] withSize:width];
}
/**
- 根據(jù)CIImage生成指定大小的UIImage
- @param image CIImage
- @param size 圖片寬度
*/
-
(UIImage *)createNonInterpolatedUIImageFormCIImage:(CIImage *)image withSize:(CGFloat) size
{
CGRect extent = CGRectIntegral(image.extent);
CGFloat scale = MIN(size/CGRectGetWidth(extent), size/CGRectGetHeight(extent));// 1.創(chuàng)建bitmap;
size_t width = CGRectGetWidth(extent) * scale;
size_t height = CGRectGetHeight(extent) * scale;
CGColorSpaceRef cs = CGColorSpaceCreateDeviceGray();
CGContextRef bitmapRef = CGBitmapContextCreate(nil, width, height, 8, 0, cs, (CGBitmapInfo)kCGImageAlphaNone);
CIContext *context = [CIContext contextWithOptions:nil];
CGImageRef bitmapImage = [context createCGImage:image fromRect:extent];
CGContextSetInterpolationQuality(bitmapRef, kCGInterpolationNone);
CGContextScaleCTM(bitmapRef, scale, scale);
CGContextDrawImage(bitmapRef, extent, bitmapImage);// 2.保存bitmap到圖片
CGImageRef scaledImage = CGBitmapContextCreateImage(bitmapRef);
CGContextRelease(bitmapRef);
CGImageRelease(bitmapImage);
return [UIImage imageWithCGImage:scaledImage];
}
用的時(shí)候 直接
self.imageView.image = [GA_QRCode getQRCodeimageWithStrting:@"oppo" andImageWidth:200];#
亞克西～
