[iOS] bug in read descriptor value

[lilinll77]

code in iOS related file, if the service broadcast a string value long than 4 bytes, there are bug in flutter while read and parse the value

the org code

• (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForDescriptor:(CBDescriptor *)descriptor error:(NSError *)error xxxxxx int value = [descriptor.value intValue]; [result setValue:[NSData dataWithBytes:&value length:sizeof(value)]]; xxxxx xxxxx

i think should be fix it like this if ([descriptor.value isKindOfClass:[NSNumber class]]) { int value = [descriptor.value intValue]; [result setValue:[NSData dataWithBytes:&value length:sizeof(value)]]; } else if ([descriptor.value isKindOfClass:[NSString class]]) { NSString *value = descriptor.value; [result setValue:[value dataUsingEncoding:NSUTF8StringEncoding]]; }