控制臺(tái)打咏峤琛：
[BoringSSL] nw_protocol_boringssl_get_output_frames(1301) [C1.1:2][0x1023291b0] get output frames failed, state 8196
解決方法：
在application中 的
- (void)applicationWillResignActive:(UIApplication *)application{}?
添加
? __block UIBackgroundTaskIdentifier bgTask = [[UIApplication sharedApplication] beginBackgroundTaskWithName:@"bg_task" expirationHandler:^{
? ? ? ? [[UIApplication sharedApplication] endBackgroundTask:bgTask];
? ? ? ? bgTask =UIBackgroundTaskInvalid;
? ? }];
