那个对方不在线的提示框在那个文件里，找不到啊

- (void)didReceiveCallTerminated:(EMCallSession *)aSession
                          reason:(EMCallEndReason)aReason
                           error:(EMError *)aError    方法中
                UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error" message:aError.errorDescription delegate:nil cancelButtonTitle:NSLocalizedString(@"ok", @"OK") otherButtonTitles:nil, nil];
                [alertView show];
aError.errorDescription  这个

这个引文的message在SDK的.a库里吧，是不是我没法改

aError.code == EMErrorCallRemoteOffline