画清晰二维码并在其中添加小图标

话不多说直接上代码

- (void)viewDidLoad {

UIImageView *imageView = [[UIImageView alloc] init];

imageView.image = [self createCoreImage:@"123"];

[self.view addSubview:imageView];

imageView.frame = CGRectMake(200, 200, 100, 100);

}

- (UIImage*)createCoreImage:(NSString*)codeStr

{

CIFilter *filter = [CIFilter filterWithName:@"CIQRCodeGenerator"];

[filtersetDefaults];

[filtersetValue:[codeStr dataUsingEncoding:NSUTF8StringEncoding] forKey:@"inputMessage"];

// 获取生成的图片

CIImage*cilmg = filter.outputImage;

CIFilter *colorFilter = [CIFilter filterWithName:@"CIFalseColor"];

[colorFiltersetDefaults];

[colorFiltersetValue:cilmgforKey:@"inputImage"];

[colorFiltersetValue:[CIColor colorWithRed:0 green:0 blue:255] forKey:@"inputColor0"];

[colorFiltersetValue:[CIColor colorWithRed:1 green:1 blue:1] forKey:@"inputColor1"];

cilmg = colorFilter.outputImage;

CGAffineTransform scale = CGAffineTransformMakeScale(10, 10);

cilmg = [cilmgimageByApplyingTransform:scale];

// 在中心生成一张图片

UIImage *img = [UIImage imageWithCIImage:cilmg];

// 生成图片

UIGraphicsBeginImageContext(img.size);

//将二维码的图片画入

[imgdrawInRect:CGRectMake(0, 0, img.size.width, img.size.height)];

//在中心画入其他图片

UIImage *centerImg = [UIImage imageNamed:@"1024的.png"];

[centerImgdrawInRect:CGRectMake((img.size.width - 50)*0.5, (img.size.height - 50) * 0.5, 50, 50)];

//获取绘制好的图片

UIImage *finalImg = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

returnfinalImg;

}