iOS8 生成二维码与条形码

iOS8 生成二维码与条形码

效果图：

源码：

//

//  ViewController.m

//  CodeCreator

//

//  Created by YouXianMing on 15/3/16.

//  Copyright (c) 2015年 YouXianMing. All rights reserved.

//

#import "ViewController.h"

@interface ViewController ()

@property (nonatomic, strong) UIImageView *imageView;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    self.imageView        = [[UIImageView alloc] initWithFrame:CGRectMake(, , , )];

    self.imageView.center = self.view.center;

    [self.view addSubview:self.imageView];

    [self generateCode];

}

- (UIImage *)resizeImage:(UIImage *)image

             withQuality:(CGInterpolationQuality)quality

                    rate:(CGFloat)rate {

    UIImage *resized = nil;

    CGFloat width    = image.size.width * rate;

    CGFloat height   = image.size.height * rate;

    UIGraphicsBeginImageContext(CGSizeMake(width, height));

    CGContextRef context = UIGraphicsGetCurrentContext();

    CGContextSetInterpolationQuality(context, quality);

    [image drawInRect:CGRectMake(, , width, height)];

    resized = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return resized;

}

- (void)generateCode {

    // @"CICode128BarcodeGenerator"  条形码

    // @"CIAztecCodeGenerator"       二维码

    NSString *filtername = @"CICode128BarcodeGenerator";

    CIFilter *filter = [CIFilter filterWithName:filtername];

    [filter setDefaults];

    NSData *data = [@"YouXianMing" dataUsingEncoding:NSUTF8StringEncoding];

    [filter setValue:data forKey:@"inputMessage"];

    CIImage *outputImage = [filter outputImage];

    CIContext *context = [CIContext contextWithOptions:nil];

    CGImageRef cgImage = [context createCGImage:outputImage

                                       fromRect:[outputImage extent]];

    UIImage *image = [UIImage imageWithCGImage:cgImage

                                         scale:.

                                   orientation:UIImageOrientationUp];

    // Resize without interpolating

    CGFloat scaleRate = self.imageView.frame.size.width / image.size.width;

    UIImage *resized = [self resizeImage:image

                             withQuality:kCGInterpolationNone

                                    rate:scaleRate];

    self.imageView.image = resized;

    CGImageRelease(cgImage);

}

@end