iOS从系统相册中识别二维码

现在的app对二维码的使用越来越频繁了，几乎每个App都有这个功能，而在iOS8之前想要识别系统相册中的二维码，只能使用第三方，iOS8之后系统加入的原生识别二维码的方式，很简单

需要先声明代理方法

@interface ViewController ()<UINavigationControllerDelegate,UIImagePickerControllerDelegate>

UIImagePickerController *imagrPicker = [[UIImagePickerController alloc]init];        imagrPicker.delegate = self;        imagrPicker.allowsEditing = YES;        //将来源设置为相册        imagrPicker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;        [self presentViewController:imagrPicker animated:YES completion:nil];

代理方法

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{    //获取选中的照片    UIImage *image = info[
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