iOS二维生成

#import "ViewController.h"

@interface ViewController ()

// 用于显示生成二维码图片的 imageView

@property (weak, nonatomic) IBOutlet UIImageView *imageView;

@end

@implementation ViewController

// 点击生成二维码

- (IBAction)click {

    //创建滤镜

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

    //设置默认值

    [filter setDefaults];

    //设置内容

    [filter setValue:[@"https://www.baidu.com" dataUsingEncoding:NSUTF8StringEncoding] forKey:@"inputMessage"];

    //生成图片

    CIImage *image = [filter outputImage];

    //放大图片

    image = [image imageByApplyingTransform:CGAffineTransformMakeScale(8, 8)];

    //显示二维码图片

    self.imageView.image = [UIImage imageWithCIImage:image];

}

@end

iOS二维生成

原文：http://www.cnblogs.com/chenweb/p/7633261.html