ScanQRCodeViewController

<h4>功能描述</h4> <p>1.初始化二维码扫描界面qrview</p> <pre><code>[self.view addSubview:self.qrview]; [self.qrview.scanView addTimer]; //刷新扫描界面 [self.qrview.scanView removeTimer];//停止扫描界面</code></pre> <p>2.初始化二维码扫描功能</p> <pre><code>self.obtain = [SGQRCodeObtain QRCodeObtain]; [self setupQRCodeScan];</code></pre> <p>3.开始扫描</p> <pre><code>[self.obtain startRunningWithBefore:nil completion:nil];</code></pre> <p>4.停止扫描</p> <pre><code>[self.obtain stopRunning];</code></pre> <p>5.二维码扫描结果传入服务器</p> <pre><code>-(void)confirmQRCode:(NSString *)code</code></pre> <p>6.接收服务器返回结果 VTQRCodeDelegate</p> <pre><code>- (void)scanSuccess:(NSDictionary *)result - (void)scanFail:(VTErrorCode)error</code></pre> <p>在Demo中扫描成功务必添加以下通知 ，启动识别 或者 在跳回MainViewController之后主动调用<code>[self presentVController]</code></p> <pre><code>[[NSNotificationCenter defaultCenter] postNotificationName:@"custom_viewwillappear" object:nil];</code></pre>