目前我有：

manager = [[CBCentralManager alloc] initWithDelegate:self queue:nil];
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:FALSE],CBCentralManagerScanOptionAllowDuplicatesKey,nil];
[manager scanForPeripheralsWithServices:nil options:options];

这将启动我的应用程序扫描BLE设备,并在发现设备时调用此委托方法：

- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI {
    NSLog(@"Did discover peripheral. peripheral: %@ RSSi: %@,UUID: %@ advertisementData: %@ ",peripheral,RSSI,peripheral.UUID,advertisementData);
    //Do something when a peripheral is discovered.

    RSSiLabel.text = [RSSI stringValue];

    [manager retrievePeripherals:[NSArray arrayWithObject:(id)peripheral.UUID]];}

这个方法可以得到我可以显示的外设的RSSI号码.最后一行然后调用这个委托方法：

- (void) centralManager:(CBCentralManager *)central didRetrievePeripherals:(NSArray *)peripherals {

    NSLog(@"Currently known peripherals :");
    int i = 0;
    for(CBPeripheral *peripheral in peripherals) {
        NSLog(@"[%d] - peripheral : %@ with UUID : %@",i,peripheral.UUID);

    }

     NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:FALSE],nil];
     [manager scanForPeripheralsWithServices:nil options:options];

}

这个代码似乎正在工作,大概每1分钟进行一次扫描,但我不完全知道为什么它工作…

核心蓝牙的文档相当稀疏,如果有任何人有任何想法,如何做到这一点,或有一个更好的方式来做我想要完成的事情,我会感谢帮助！