关于iOS开发:IOS录音录音权限

在 IOS 上录音，须要先取得权限，不然录音只能返回空数据。

取得权限有两步：

1.Info 设置

在 Xcode->Info->Custom iOS target properties 里，增加 Privacy-Microphone Usage Description 设置，并填写一段形容。

2. 代码中动静申请

//recordPermission 获取以后的权限状况
//requestRecordPermission 申请权限
-(void)checkRecordPermission{AVAudioSession* session = [AVAudioSession sharedInstance];
    AVAudioSessionRecordPermission recordPermission = [session recordPermission];
    if(recordPermission == AVAudioSessionRecordPermissionUndetermined)
    {NSLog(@"record permission:%d", recordPermission);
        if([session respondsToSelector:@selector( requestRecordPermission:)])
        {[session requestRecordPermission:^(BOOL granted) {if( granted)
                {NSLog(@"get record permission");
                }
                else{NSLog(@"not permit record");
                }
            }];
        }
    }
    else{if( recordPermission == AVAudioSessionRecordPermissionGranted)
        {NSLog(@"already get record permission");
        }
        else{NSLog(@"already denied record permission ,please set in settings");
        }
    }
}