iOS ANE NSStream delegate not called

Hi, I have successfully created connection to Apple MFi printer, but I'm failed to have NSOutputStream to write to the printer because delegate did not called.

Here is my LibPrint.h:-

1. #import <Foundation/Foundation.h>
2. #import <ExternalAccessory/ExternalAccessory.h>
3. #import "FlashRuntimeExtensions.h"
5. @interface LibPrint : NSObject <NSStreamDelegate>
7. - (void)printR;
8. - (void)stream:(NSStream *)theStream handleEvent:(NSStreamEvent)streamEvent;
10. @end
12. // C interface
13. FREObject fncPrintR(FREContext ctx, void* funcData, uint32_t argc, FREObject argv[]);

LibPrint.m:-

1. #import "LibPrint.h"
3. @interface LibPrint ()
5. @property (nonatomic, strong) EASession *easPrinter;
6. @property (nonatomic, strong) NSData *datPrintData;
8. @end
11. @implementation LibPrint
13. FREContext eventContext;
14. LibPrint *AirInAppRefToSelf;
16. #pragma mark - NSObject
18. -(id)init
19. {
20.     self = [super init];
21.     if (self)
22.     {
23.         AirInAppRefToSelf = self;
24.         self.easPrinter = nil;
25.         self.datPrintData = nil;
26.     }
27.     return self;
28. }
30. -(void)dealloc
31. {
32.     self.easPrinter = nil;
33.     self.datPrintData = nil;
34.     AirInAppRefToSelf = nil;
35. }
38. #pragma mark - ANE setup
40. void LibPrintExtContextInitializer(void* extData, const uint8_t* ctxType, FREContext ctx, uint32_t* numFunctionsToTest, const FRENamedFunction** functionsToSet)
41. {
42.     *numFunctionsToTest = 1;
44.     FRENamedFunction* func = (FRENamedFunction*) malloc(sizeof(FRENamedFunction) * *numFunctionsToTest);
46.     func[0].name = (const uint8_t*) "printR";
47.     func[0].functionData = NULL;
48.     func[0].function = &fncPrintR;
50.     *functionsToSet = func;
52.     eventContext = ctx;
54.     if ((LibPrint*) AirInAppRefToSelf == nil)
55.     {
56.         AirInAppRefToSelf = [[LibPrint alloc] init];
57.     }
58. }
60. void LibPrintContextFinalizer(FREContext ctx) { }
62. void LibPrintExtensionInitializer(void** extDataToSet, FREContextInitializer* ctxInitializerToSet, FREContextFinalizer* ctxFinalizerToSet)
63. {
64.     *extDataToSet = NULL;
65.     *ctxInitializerToSet = &LibPrintExtContextInitializer;
66.     *ctxFinalizerToSet = &LibPrintContextFinalizer;
67. }
69. void LibPrintFinalizer(void* extData) { }
72. #pragma mark - C interface
74. FREObject fncPrintR(FREContext ctx, void* funcData, uint32_t argc, FREObject argv[])
75. {
76.     FREObject result = NULL;
77. 
    
78.     if ([AirInAppRefToSelf datPrintData] != nil) {
79.         [AirInAppRefToSelf setDatPrintData:nil];
80.     }
82.     // Retrieve message
83.     NSData *ldatPrintData = toNSDataByteArray(argv[0]);
84.     [AirInAppRefToSelf setDatPrintData:ldatPrintData];
85.     [(LibPrint*) AirInAppRefToSelf printR];
86.    
87.     return result;
88. }
90. - (void)printR
91. {
92.     BOOL lblnConnected = false;
93.     BOOL lblnFound = false;
94.     NSArray *accessories = [EAAccessoryManager sharedAccessoryManager].connectedAccessories;
95.     for (EAAccessory *accessory in accessories)
96.     {
97.         if (accessory.connected)
98.         {
99.             lblnConnected = true;
100.             for (NSString *protocol in accessory.protocolStrings)
101.             {
102.                 if ([protocol isEqualToString:@"jp.star-m.starpro"])
103.                 {
104.                     lblnFound = true;
105.                     [self setEasPrinter:[[EASession alloc] initWithAccessory:accessory forProtocol:protocol]];
107.                     [[self easPrinter].outputStream setDelegate:self];
108.                     [[self easPrinter].outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
109.                     [[self easPrinter].outputStream open];
110.                 }
111.             }
112.         }
113.     }
114.     FREDispatchStatusEventAsync(eventContext, (uint8_t*)"DEBUG_DATA", (uint8_t*) [[NSString stringWithFormat: @"connected: %s", lblnConnected ? "true" : "false"]  UTF8String]);
115.     FREDispatchStatusEventAsync(eventContext, (uint8_t*)"DEBUG_DATA", (uint8_t*) [[NSString stringWithFormat: @"found: %s", lblnFound ? "true" : "false"]  UTF8String]);
116. }
118. - (void)stream:(NSStream *)theStream handleEvent:(NSStreamEvent)streamEvent
119. {
120.     FREDispatchStatusEventAsync(eventContext, (uint8_t*)"DEBUG_DATA", (uint8_t*) [@"NSStreamDelegate"  UTF8String]);
122.     switch (streamEvent)
123.     {
124.         case NSStreamEventNone:
125.         {
126.             break;
127.         }
128.         case NSStreamEventOpenCompleted:
129.         {
130.             break;
131.         }
132.         case NSStreamEventHasBytesAvailable:
133.         {
134.             break;
135.         }
136.         case NSStreamEventHasSpaceAvailable:
137.         {
138.             FREDispatchStatusEventAsync(eventContext, (uint8_t*)"DEBUG_DATA", (uint8_t*) [@"NSStreamEventHasSpaceAvailable"  UTF8String]);
139.             NSInteger len = [[self easPrinter].outputStream write:[[self datPrintData] bytes] maxLength:[[self datPrintData] length]];
140.             FREDispatchStatusEventAsync(eventContext, (uint8_t*)"DEBUG_DATA", (uint8_t*) [[NSString stringWithFormat: @"data len: %ld, returned len: %ld", [[self datPrintData] length], len]  UTF8String]);
141.             break;
142.         }
143.         case NSStreamEventErrorOccurred:
144.         {
145.             break;
146.         }
147.         case NSStreamEventEndEncountered:
148.         {
149.             break;
150.         }
151.     }
152. }
154. NSData *toNSDataByteArray(FREObject *ba)
155. {
156.     FREByteArray byteArray;
157.     FREAcquireByteArray(ba, &byteArray);
159.     NSData *d = [NSData dataWithBytes:(void *)byteArray.bytes length:(NSUInteger)byteArray.length];
160.     FREReleaseByteArray(ba);
162.     return d;
163. }
165. @end

I have printer connected good, but the delegate method [- (void)stream:(NSStream *)theStream handleEvent:(NSStreamEvent)streamEvent] never run. I guess maybe

the currentRunLoop issue, I tried to change it to mainRunLoop, but still no clue. Please help, thanks in advanced!