//生成二维码

- (void)createCIImageWithText:(NSString*)text

{

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

NSString*string = text;

NSData*data = [stringdataUsingEncoding:NSUTF8StringEncoding];

//2.通过kVO设置滤镜传入数据

[filtersetValue:dataforKey:@"inputMessage"];

//3.生成二维码

CIImage*iconImage = [filteroutputImage];

UIImageView*tempImageView = [[UIImageViewalloc]initWithFrame:(CGRectMake(50,50,100,100))];

UIImage*image = [UIImageimageWithCIImage:iconImage];

tempImageView.image= image;

[self.viewaddSubview:tempImageView];

}