closed #4562, fix audio resume bug after stop the music

cocos/audio/ios/CDAudioManager.h

@@ -100,6 +100,7 @@ typedef enum {
     BOOL            backgroundMusic;
     // whether background music is paused
     BOOL            paused;
+    BOOL            stopped;
 @public    
     BOOL            systemPaused;//Used for auto resign handling
     NSTimeInterval    systemPauseLocation;//Used for auto resign handling

cocos/audio/ios/CDAudioManager.m

@@ -48,6 +48,7 @@ NSString * const kCDN_AudioManagerInitialised = @"kCDN_AudioManagerInitialised";
         mute = NO;
         enabled_ = YES;
         paused = NO;
+        stopped = NO;
     }
     return self;
 }
@@ -96,6 +97,7 @@ NSString * const kCDN_AudioManagerInitialised = @"kCDN_AudioManagerInitialised";
     if (enabled_) {
         self->systemPaused = NO;
         self->paused = NO;
+        self->stopped = NO;
         [audioSourcePlayer play];
     } else {
         CDLOGINFO(@"Denshion::CDLongAudioSource long audio source didn't play because it is disabled");
@@ -104,6 +106,7 @@ NSString * const kCDN_AudioManagerInitialised = @"kCDN_AudioManagerInitialised";
 
 -(void) stop {
     self->paused = NO;
+    self->stopped = YES;
     [audioSourcePlayer stop];
 }    
 
@@ -118,8 +121,10 @@ NSString * const kCDN_AudioManagerInitialised = @"kCDN_AudioManagerInitialised";
 }
 
 -(void) resume {
-    self->paused = NO;
-    [audioSourcePlayer play];
+    if (!stopped) {
+        self->paused = NO;
+        [audioSourcePlayer play];
+    }
 }
 
 -(BOOL) isPlaying {

cocos/audio/mac/CDAudioManager.m

@@ -119,7 +119,7 @@ NSString * const kCDN_AudioManagerInitialised = @"kCDN_AudioManagerInitialised";
 
 -(void) resume {
     self->paused = NO;
-    [audioSourcePlayer play];
+    [audioSourcePlayer resume];
 }    
 
 -(BOOL) isPlaying {

cocos/audio/mac/CDXMacOSXSupport.h

@@ -96,6 +96,7 @@ extern OSStatus AudioSessionGetProperty(UInt32 inID, UInt32 *ioDataSize, void *o
 - (BOOL)playAtTime:(NSTimeInterval) time;  /* play a sound some time in the future. time should be greater than deviceCurrentTime. */
 - (void)pause;			/* pauses playback, but remains ready to play. */
 - (void)stop;			/* stops playback. no longer ready to play. */
+- (BOOL) resume;
 
 /* properties */
 

cocos/audio/mac/CDXMacOSXSupport.mm

@@ -90,6 +90,12 @@ OSStatus AudioSessionGetProperty(UInt32 inID, UInt32 *ioDataSize, void *outData)
 	return result;
 }
 
+- (BOOL) resume{
+    BOOL result = [_player resume];
+    return result;
+}
+
+
 -(void) pause {
 	[_player pause];
 }