fix: goodatlas#46

Author: jaybowang

ios/RNAudioRecord.m

@@ -1,5 +1,10 @@
 #import "RNAudioRecord.h"
 
+@interface RNAudioRecord ()
+@property (nonatomic, nullable, copy) AVAudioSessionCategory previousCategory;
+@end
+
+
 @implementation RNAudioRecord
 
 RCT_EXPORT_MODULE();
@@ -29,6 +34,8 @@ @implementation RNAudioRecord
 RCT_EXPORT_METHOD(start) {
     RCTLogInfo(@"start");
 
+    [self savePreviousCategory];
+    
     // most audio players set session category to "Playback", record won't work in this mode
     // therefore set session category to "Record" before recording
     [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryRecord error:nil];
@@ -57,6 +64,7 @@ @implementation RNAudioRecord
         AudioQueueDispose(_recordState.mQueue, true);
         AudioFileClose(_recordState.mAudioFile);
     }
+    [self restorePreviousCategory];
     resolve(_filePath);
     unsigned long long fileSize = [[[NSFileManager defaultManager] attributesOfItemAtPath:_filePath error:nil] fileSize];
     RCTLogInfo(@"file path %@", _filePath);
@@ -118,4 +126,15 @@ + (void)createDir: (NSString *) filePath {
     }
 }
 
+- (void)savePreviousCategory {
+    self.previousCategory = [AVAudioSession sharedInstance].category;
+}
+
+- (void)restorePreviousCategory {
+    if (self.previousCategory) {
+        [[AVAudioSession sharedInstance] setCategory:self.previousCategory error:nil];
+        self.previousCategory = nil;
+    }
+}
+
 @end