Objective C autorelease object with block - objective-c

Question

I have an object that I use like this
[PeripheralManager readValueForCharacteristic:[CBUUID UUIDWithString:CHARACTERISTIC_TX_POWER_LEVEL]
inService:[CBUUID UUIDWithString:SERVICE_TX_POWER]
completionBlock:^(NSData *value) {
//code
}];
The problem is that if I doesn't save the object in a strong property when I call completionBlock the app crashes.
You can say "Save your PeripheralManager in a strong property"... well there are some situation in witch I have to read a value and than another value again e so on, maybe for 3 or 4 times.
In other situation is possible call class method that returns some values in a block and the block is not deallocated. Is there a way to keep mi PeripheralManager in memory ?
Edit
+ (id)readValueForCharacteristic:(CBUUID *)cUUID
inService:(CBUUID *)sUUID
completionBlock:(completionBlock)completionBlock
{
return [[self alloc] initForReadValueForCharacteristic:cUUID
inService:sUUID
completionBlock:completionBlock];
}
- (id)initForWriteValue:(unsigned char)value
forCharacteristic:(CBUUID *)cUUID
inService:(CBUUID *)sUUID
completionBlock:(completionBlock)completionBlock
{
self = [super init];
if (self)
{
self.completionBlock = [completionBlock copy];
self.accessType = PeripheralAccessTypeWrite;
self.valueToSet = value;
if (cUUID && sUUID)
{
self.sUUID = sUUID;
self.cUUID = cUUID;
self.connectedPeripheral = [[BLEManager manager] getConnectedPeripheral];
self.connectedPeripheral.delegate = self;
if (self.connectedPeripheral && self.connectedPeripheral.state == CBPeripheralStateConnected)
{
[self.connectedPeripheral discoverServices:#[sUUID]];
}
}
else NSLog(#"cUUID and sUUID are mandatory");
}
return self;
}
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error
{
// NSLog(#"didDiscoverServices");
for (CBService *service in peripheral.services)
{
if ([service.UUID isEqual:self.sUUID])
{
[peripheral discoverCharacteristics:#[self.cUUID] forService:service];
}
}
}
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error
{
if (service.UUID.UUIDString.length >= 8)
{
for (CBCharacteristic *characteristic in service.characteristics)
{
if ([characteristic.UUID isEqual:self.cUUID])
{
if (self.accessType == PeripheralAccessTypeRead)
{
self.connectedCharacteristic = characteristic;
[peripheral setNotifyValue:YES forCharacteristic:characteristic];
[peripheral readValueForCharacteristic:characteristic];
}
else
{
self.connectedCharacteristic = characteristic;
[peripheral setNotifyValue:YES forCharacteristic:characteristic];
unsigned char dat = self.valueToSet;
NSLog(#"dat %i", dat);
NSData * valueData = [NSData dataWithBytes:&dat length:1];
NSLog(#"valueData %#",valueData);
[peripheral writeValue:valueData forCharacteristic:characteristic type:CBCharacteristicWriteWithResponse];
}
}
}
}
}
- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
{
if (error)
{
NSLog(#"%#",error.localizedDescription);
}
else
{
NSString * characteristicName = [self getCharacteristicName:characteristic];
NSData * value = [self readValueFromCharacteristic:characteristic];
NSLog(#"update %#: %#",characteristicName ,value);
self.completionBlock(value);
}
}
Thanks