iOS二维码生成

#import "ViewController.h"

@interface ViewController ()

@property (weak,nonatomic) IBOutletUIImageView *imageView;

@end

@implementation ViewController

- (void)viewDidLoad {

    [superviewDidLoad];

    

}

// 点击生成二维码

- (IBAction)click {

    

    //创建滤镜

    CIFilter *filter = [CIFilterfilterWithName:@"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 = [filteroutputImage];

    

    //放大图片

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

    

    //显示二维码图片

    self.imageView.image = [UIImageimageWithCIImage:image];

}

@end