QRCode

根据系统API, 封装二维码扫描
代码:https://github.com/whde/QRCode

• 1.link AVFoundation.framework
• 2.#import <AVFoundation/AVFoundation.h>
• 3.拷贝以下代码

/*!
 *  扫一扫
 */
- (void)intoQRCodeVC {
    NSString *mediaType = AVMediaTypeVideo;
    AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:mediaType];
    if(authStatus == AVAuthorizationStatusDenied){
        if (IS_VAILABLE_IOS8) {
            UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"相机权限受限" message:@"请在iPhone的\\"设置->隐私->相机\\"选项中,允许\\"自游邦\\"访问您的相机." preferredStyle:UIAlertControllerStyleAlert];
            [alert addAction:[UIAlertAction actionWithTitle:@"好" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
            }]];
            [alert addAction:[UIAlertAction actionWithTitle:@"去设置" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
                if ([self canOpenSystemSettingView]) {
                    [self systemSettingView];
                }
            }]];
            [self presentViewController:alert animated:YES completion:nil];
        } else {
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"相机权限受限" message:@"请在iPhone的\\"设置->隐私->相机\\"选项中,允许\\"自游邦\\"访问您的相机." delegate:nil cancelButtonTitle:@"好的" otherButtonTitles:nil];
            [alert show];
        }

        return;
    }
    
    QRCodeController *qrcodeVC = [[QRCodeController alloc] init];
    qrcodeVC.view.alpha = 0;
    [qrcodeVC setDidReceiveBlock:^(NSString *result) {
        NSLog(@"%@", result);
    }];
    AppDelegate *del = (AppDelegate *)[UIApplication sharedApplication].delegate;
    [del.window.rootViewController addChildViewController:qrcodeVC];
    [del.window.rootViewController.view addSubview:qrcodeVC.view];
    [UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
        qrcodeVC.view.alpha = 1;
    } completion:^(BOOL finished) {
    }];
}

/**
 *  是否可以打开设置页面
 *
 *  @return
 */
- (BOOL)canOpenSystemSettingView {
    if (IS_VAILABLE_IOS8) {
        NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
        if ([[UIApplication sharedApplication] canOpenURL:url]) {
            return YES;
        } else {
            return NO;
        }
    } else {
        return NO;
    }
}

/**
 *  跳到系统设置页面
 */
- (void)systemSettingView {
    if (IS_VAILABLE_IOS8) {
        NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
        if ([[UIApplication sharedApplication] canOpenURL:url]) {
            [[UIApplication sharedApplication] openURL:url];
        }
    }
}