iOS生成二维码

#import "ViewController.h"

#import <CoreImage/CoreImage.h>

@interface
ViewController ()

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

@end

@implementation ViewController

- (void)viewDidLoad {

    [super
viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    

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

    [filter setDefaults];

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

    CIImage *outputImage = [filter
outputImage];

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

}

@end