二维码的生成

二维码的生成比较简单

我们使用了一个三方库

这个三方库是纯C写的 内部实现比较复杂     

但是我们使用起来非常方便一行代码搞定 

我们需要三方库是 libqrencode 这个可以从github上下载

下面简单的实现一下

#import "ViewController.h"
#import "QRCodeGenerator.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(100, 200, 200, 200)];
    [self.view addSubview:imageView];
    
    UIImageView *image = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"UnbundQQTipsicon"]];
    image.frame = CGRectMake(imageView.frame.size.width/2-40/2, imageView.frame.size.height/2-40/2, 40, 40);
    [imageView addSubview:image];
    //生成二维码
    imageView.image = [QRCodeGenerator qrImageForString:@"好好学习天天向上" imageSize:200];
    
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end