iOS -- 產生有logo的二維碼

標籤：

- (void)createLogoImage {    NSArray *filter = [CIFilter filterNamesInCategory:kCICategoryBuiltIn];    NSLog(@"%@", filter);    // 二維碼過濾器    CIFilter *filterImage = [CIFilter filterWithName:@"CIQRCodeGenerator"];    // 將二位碼過濾器設定為預設屬性    [filterImage setDefaults];    // 將文字轉化為二進位    NSData *dataImage = [@"mafeng" dataUsingEncoding:NSUTF8StringEncoding];    // 列印輸入的屬性    NSLog(@"%@", filterImage.inputKeys);    // KVC 賦值    [filterImage setValue:dataImage forKey:@"inputMessage"];    // 取出輸出圖片    CIImage *outputImage = [filterImage outputImage];    outputImage = [outputImage imageByApplyingTransform:CGAffineTransformMakeScale(20, 20)];    // 轉化圖片    UIImage *image = [UIImage imageWithCIImage:outputImage];        // 為二維碼加自訂圖片        // 開啟繪圖, 擷取圖片 上下文<圖片大小>    UIGraphicsBeginImageContext(image.size);    // 將二維碼圖片畫上去    [image drawInRect:CGRectMake(0, 0, image.size.width, image.size.height)];    // 將小圖片畫上去    UIImage *smallImage = [UIImage imageNamed:@"123.jpg"];    [smallImage drawInRect:CGRectMake((image.size.width - 100) / 2, (image.size.width - 100) / 2, 100, 100)];    // 擷取最終的圖片    UIImage *finalImage = UIGraphicsGetImageFromCurrentImageContext();    // 關閉上下文    UIGraphicsEndImageContext();    // 顯示    self.imageview.image = finalImage;        }

 

iOS -- 產生有logo的二維碼