C++ CBCentralManager和自动参考计数

我有两个应用程序，它们在BLE功能上非常相似，但是其中一个可以正确扫描并发现其他没有的外围设备

他们都报告说，初始化指向

CBCentralManager

的指针时没有问题&检查它是否打开并正常工作，但其中一个继续发现并能够连接到设备，而另一个没有

在不起作用的情况下，

scanForPeripheralsWithServices

的调用会顺利进行，但不会触发

didiscoverperipheral

回调。我认为最大的不同是一个项目使用纯<代码> ObjultC[/Cuff> &弧，而另一个使用了<代码> Objul-C<／Cuff> C++，不使用自动引用计数。 这可能是问题的根源吗？如果是这样的话，有办法解决吗？过去，我可以在没有ARC的情况下使用

coreblutooth

，但如果我无法从文档中解析，它可能已经改变了

如果不是ARC，则对scanForPeripheralsWithServices的两个调用如下所示：

功能性

- (int) findBLEPeripherals:(int) timeout
{
    NSLog(@"start finding");

    if (self.CM.state != CBCentralManagerStatePoweredOn)
    {
        NSLog(@"CoreBluetooth not correctly initialized !");
        NSLog(@"State = %d (%s)\r\n", self.CM.state, [self centralManagerStateToString:self.CM.state]);
        return -1;
    }

    [NSTimer scheduledTimerWithTimeInterval:(float)timeout target:self selector:@selector(scanTimer:) userInfo:nil repeats:NO];


    [self.CM scanForPeripheralsWithServices:[NSArray arrayWithObject:[CBUUID UUIDWithString:@RBL_SERVICE_UUID]] options:nil];

    NSLog(@"scanForPeripheralsWithServices");

    return 0; // Started scanning OK !
}

- (void)startScan
{
    NSLog(@"startScan");

    isScanning = true;

    NSDictionary *options = nil;

    didUpdateDiscoveredDeviceFlag = [delegate respondsToSelector:@selector(didUpdateDiscoveredRFduino:)];

    if (didUpdateDiscoveredDeviceFlag) {
        options = [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES]
        forKey:CBCentralManagerScanOptionAllowDuplicatesKey];
    }

    [devices removeAllObjects];

    if (self.central.state != CBCentralManagerStatePoweredOn)
    {
        NSLog(@"CoreBluetooth not correctly initialized !");
       // NSLog(@"State = %d (%s)\r\n", self.central.state, [self centralManagerStateToString:self.central.state]);
    }

    [NSTimer scheduledTimerWithTimeInterval:(float)60 target:self selector:@selector(scanTimer:) userInfo:nil repeats:NO];

    [self.central scanForPeripheralsWithServices:[NSArray arrayWithObject:[CBUUID UUIDWithString:@RBL_SERVICE_UUID]] options:@{ CBCentralManagerScanOptionAllowDuplicatesKey : @YES }];

    if (didUpdateDiscoveredDeviceFlag) {
        [self startRangeTimer];
    }
}

@interface BLE : NSObject <CBCentralManagerDelegate, CBPeripheralDelegate> {

}

@property (nonatomic,assign) id <BLEDelegate> delegate;
@property (strong, nonatomic) NSMutableArray *peripherals;
@property (strong, nonatomic) NSMutableArray *peripheralsRssi;
@property (strong, nonatomic) CBCentralManager *CM;
@property (strong, nonatomic) CBPeripheral *activePeripheral;

@interface BLEDeviceManager : NSObject <CBCentralManagerDelegate>
{

}

+ (BLEDeviceManager *)sharedDeviceManager;

@property (strong, nonatomic) CBCentralManager *central;

非功能性

- (int) findBLEPeripherals:(int) timeout
{
    NSLog(@"start finding");

    if (self.CM.state != CBCentralManagerStatePoweredOn)
    {
        NSLog(@"CoreBluetooth not correctly initialized !");
        NSLog(@"State = %d (%s)\r\n", self.CM.state, [self centralManagerStateToString:self.CM.state]);
        return -1;
    }

    [NSTimer scheduledTimerWithTimeInterval:(float)timeout target:self selector:@selector(scanTimer:) userInfo:nil repeats:NO];


    [self.CM scanForPeripheralsWithServices:[NSArray arrayWithObject:[CBUUID UUIDWithString:@RBL_SERVICE_UUID]] options:nil];

    NSLog(@"scanForPeripheralsWithServices");

    return 0; // Started scanning OK !
}

- (void)startScan
{
    NSLog(@"startScan");

    isScanning = true;

    NSDictionary *options = nil;

    didUpdateDiscoveredDeviceFlag = [delegate respondsToSelector:@selector(didUpdateDiscoveredRFduino:)];

    if (didUpdateDiscoveredDeviceFlag) {
        options = [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES]
        forKey:CBCentralManagerScanOptionAllowDuplicatesKey];
    }

    [devices removeAllObjects];

    if (self.central.state != CBCentralManagerStatePoweredOn)
    {
        NSLog(@"CoreBluetooth not correctly initialized !");
       // NSLog(@"State = %d (%s)\r\n", self.central.state, [self centralManagerStateToString:self.central.state]);
    }

    [NSTimer scheduledTimerWithTimeInterval:(float)60 target:self selector:@selector(scanTimer:) userInfo:nil repeats:NO];

    [self.central scanForPeripheralsWithServices:[NSArray arrayWithObject:[CBUUID UUIDWithString:@RBL_SERVICE_UUID]] options:@{ CBCentralManagerScanOptionAllowDuplicatesKey : @YES }];

    if (didUpdateDiscoveredDeviceFlag) {
        [self startRangeTimer];
    }
}

@interface BLE : NSObject <CBCentralManagerDelegate, CBPeripheralDelegate> {

}

@property (nonatomic,assign) id <BLEDelegate> delegate;
@property (strong, nonatomic) NSMutableArray *peripherals;
@property (strong, nonatomic) NSMutableArray *peripheralsRssi;
@property (strong, nonatomic) CBCentralManager *CM;
@property (strong, nonatomic) CBPeripheral *activePeripheral;

@interface BLEDeviceManager : NSObject <CBCentralManagerDelegate>
{

}

+ (BLEDeviceManager *)sharedDeviceManager;

@property (strong, nonatomic) CBCentralManager *central;

以及两个头文件的相关部分：

功能性

- (int) findBLEPeripherals:(int) timeout
{
    NSLog(@"start finding");

    if (self.CM.state != CBCentralManagerStatePoweredOn)
    {
        NSLog(@"CoreBluetooth not correctly initialized !");
        NSLog(@"State = %d (%s)\r\n", self.CM.state, [self centralManagerStateToString:self.CM.state]);
        return -1;
    }

    [NSTimer scheduledTimerWithTimeInterval:(float)timeout target:self selector:@selector(scanTimer:) userInfo:nil repeats:NO];


    [self.CM scanForPeripheralsWithServices:[NSArray arrayWithObject:[CBUUID UUIDWithString:@RBL_SERVICE_UUID]] options:nil];

    NSLog(@"scanForPeripheralsWithServices");

    return 0; // Started scanning OK !
}

- (void)startScan
{
    NSLog(@"startScan");

    isScanning = true;

    NSDictionary *options = nil;

    didUpdateDiscoveredDeviceFlag = [delegate respondsToSelector:@selector(didUpdateDiscoveredRFduino:)];

    if (didUpdateDiscoveredDeviceFlag) {
        options = [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES]
        forKey:CBCentralManagerScanOptionAllowDuplicatesKey];
    }

    [devices removeAllObjects];

    if (self.central.state != CBCentralManagerStatePoweredOn)
    {
        NSLog(@"CoreBluetooth not correctly initialized !");
       // NSLog(@"State = %d (%s)\r\n", self.central.state, [self centralManagerStateToString:self.central.state]);
    }

    [NSTimer scheduledTimerWithTimeInterval:(float)60 target:self selector:@selector(scanTimer:) userInfo:nil repeats:NO];

    [self.central scanForPeripheralsWithServices:[NSArray arrayWithObject:[CBUUID UUIDWithString:@RBL_SERVICE_UUID]] options:@{ CBCentralManagerScanOptionAllowDuplicatesKey : @YES }];

    if (didUpdateDiscoveredDeviceFlag) {
        [self startRangeTimer];
    }
}

@interface BLE : NSObject <CBCentralManagerDelegate, CBPeripheralDelegate> {

}

@property (nonatomic,assign) id <BLEDelegate> delegate;
@property (strong, nonatomic) NSMutableArray *peripherals;
@property (strong, nonatomic) NSMutableArray *peripheralsRssi;
@property (strong, nonatomic) CBCentralManager *CM;
@property (strong, nonatomic) CBPeripheral *activePeripheral;

@interface BLEDeviceManager : NSObject <CBCentralManagerDelegate>
{

}

+ (BLEDeviceManager *)sharedDeviceManager;

@property (strong, nonatomic) CBCentralManager *central;

@interface-BLE:NSObject{
}
@属性（非原子，赋值）id委托；
@属性（强、非原子）NSMutableArray*外围设备；
@属性（强，非原子）NSMutableArray*外围设备SSI；
@属性（强、非原子）CBCentralManager*CM；
@性质（强，非原子）CBPeripheral*activePeripheral；

非功能性

- (int) findBLEPeripherals:(int) timeout
{
    NSLog(@"start finding");

    if (self.CM.state != CBCentralManagerStatePoweredOn)
    {
        NSLog(@"CoreBluetooth not correctly initialized !");
        NSLog(@"State = %d (%s)\r\n", self.CM.state, [self centralManagerStateToString:self.CM.state]);
        return -1;
    }

    [NSTimer scheduledTimerWithTimeInterval:(float)timeout target:self selector:@selector(scanTimer:) userInfo:nil repeats:NO];


    [self.CM scanForPeripheralsWithServices:[NSArray arrayWithObject:[CBUUID UUIDWithString:@RBL_SERVICE_UUID]] options:nil];

    NSLog(@"scanForPeripheralsWithServices");

    return 0; // Started scanning OK !
}

- (void)startScan
{
    NSLog(@"startScan");

    isScanning = true;

    NSDictionary *options = nil;

    didUpdateDiscoveredDeviceFlag = [delegate respondsToSelector:@selector(didUpdateDiscoveredRFduino:)];

    if (didUpdateDiscoveredDeviceFlag) {
        options = [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES]
        forKey:CBCentralManagerScanOptionAllowDuplicatesKey];
    }

    [devices removeAllObjects];

    if (self.central.state != CBCentralManagerStatePoweredOn)
    {
        NSLog(@"CoreBluetooth not correctly initialized !");
       // NSLog(@"State = %d (%s)\r\n", self.central.state, [self centralManagerStateToString:self.central.state]);
    }

    [NSTimer scheduledTimerWithTimeInterval:(float)60 target:self selector:@selector(scanTimer:) userInfo:nil repeats:NO];

    [self.central scanForPeripheralsWithServices:[NSArray arrayWithObject:[CBUUID UUIDWithString:@RBL_SERVICE_UUID]] options:@{ CBCentralManagerScanOptionAllowDuplicatesKey : @YES }];

    if (didUpdateDiscoveredDeviceFlag) {
        [self startRangeTimer];
    }
}

@interface BLE : NSObject <CBCentralManagerDelegate, CBPeripheralDelegate> {

}

@property (nonatomic,assign) id <BLEDelegate> delegate;
@property (strong, nonatomic) NSMutableArray *peripherals;
@property (strong, nonatomic) NSMutableArray *peripheralsRssi;
@property (strong, nonatomic) CBCentralManager *CM;
@property (strong, nonatomic) CBPeripheral *activePeripheral;

@interface BLEDeviceManager : NSObject <CBCentralManagerDelegate>
{

}

+ (BLEDeviceManager *)sharedDeviceManager;

@property (strong, nonatomic) CBCentralManager *central;

@接口BLEDeviceManager:NSObject
{
}
+（BLEDeviceManager*）共享副经理；
@属性（强、非原子）CBCentralManager*central；

---

非常感谢任何建议

这有点傻，但重启手机+清理/构建修复了所有问题。我怀疑这两个应用程序在释放CBCentralManager句柄时没有很好地配合，但这只是一个猜测。老实说，我对CoreBluetooth或Objective C不太熟悉，所以我的猜测也不是很灵通。

嘿，Joshua。。。好名字：）愚蠢的问题，但是你在第二个版本中设置了代理吗。。。i、 e.

self.central.delegate=self

？在第二种情况下，您是否尝试了nil选项？我尝试了nil选项，是的，代理已设置，但这很愚蠢，重新启动手机+清理/构建修复了所有问题。坦白说，我有点尴尬，我想删除这个问题。你可以自己回答，而不是删除这个问题。这可能对有同样问题的人有所帮助。