iOS 应用内调用微信扫一扫

// iOS APP跳转扫一扫

        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"weixin://scanqrcode"]];

        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"weixin://scanqrcode"] options:[NSDictionary new] completionHandler:^(BOOL success) {

            if(success) {

                NSLog(@"12");

            }

        }];