在CoreBluetooth LE iOS中存儲發現外圍設備的UUID

Question

我嘗試下面的代碼將已發現設備的UUID存儲到Array，然后在此陣列中選擇UUID進行連接但不運行。

- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI {

    NSLog (@"Discovered peripheral: %@", [peripheral name]);
    [foundArray addObject:peripheral.name];

    NSLog (@"UUID peripheral: %@", [peripheral UUID]);

    CFUUIDRef uuid = [peripheral UUID];
    [discoverUUIDArray addObject: (__bridge id)(uuid)];
    NSLog(@"Before = %@", uuid);

    NSLog (@"peripheral services before connected: %@", [peripheral services]);

    NSLog(@"adversting data %@",[NSString stringWithFormat:@"%@",[advertisementData description]]);

    self.activePeripheral = peripheral;

    NSLog(@"foundArray is %@", foundArray);
    NSLog(@"discoverUUIDArray is %@", discoverUUIDArray);
    [self.tblFound reloadData];

}

然后我將這些Discover設備加載到tableview，當用戶選擇要連接的設備時，我的應用程序掛起。

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if(self.manager.state == CBCentralManagerStatePoweredOn)
    {
        NSLog(@"You selected %@ to connect",[foundArray objectAtIndex:indexPath.row]);
        CFUUIDRef uuidGet = (__bridge CFUUIDRef) [discoverUUIDArray objectAtIndex:indexPath.row];
        NSLog(@"UUID is %@",[discoverUUIDArray objectAtIndex:indexPath.row]);
        [self.manager connectPeripheral:[discoverUUIDArray objectAtIndex:indexPath.row] options:nil];

    }
}

選擇要連接的設備時，會顯示錯誤：

[__NSCFType state]: unrecognized selector sent to instance 0x17d70950
2013-12-25 15:17:40.699 TestPeripheral[213:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFType state]: unrecognized selector sent to instance 0x17d70950'

discoverUUIDArray存儲發現設備的UUID。 我不知道為什么。 請給我一些建議。 非常感謝。

Answer 1

CFUUIDRef uuid = [peripheral UUID]; 在iOS7中不推薦使用，如果需要，可以使用peripheral.identifier作為NSUUID存儲在數組中

如果意圖是存儲UUID's以供將來檢索，請將其保存在NSUserDefaults而不是運行時數組中

Answer 2

您可以創建一個NSMutableArray來存儲所有已發現設備的列表，然后使用此列表填充UITableView並連接（如果用戶選擇）。

例如

- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI
{
    NSString *localName = [advertisementData objectForKey:CBAdvertisementDataLocalNameKey];
    if (![localName isEqual:@""]) {
        [self.BTLEDevices addObject:peripheral];
    }
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *tableIdentifier = @"BLEDeviceList";
    CBPeripheral *peripheral = [self.BTLEDevices objectAtIndex:indexPath.row];
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:tableIdentifier forIndexPath:indexPath];
    cell.textLabel.text = peripheral.name;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    CBPeripheral *peripheral = [self.BTLEDevices objectAtIndex:[indexPath.row integerValue]];  
    peripheral.delegate = self;
    [self.BTLECentralManager connectPeripheral:peripheral options:nil];
}

不要忘記創建UITableView對象並將其添加到視圖中，我也遺漏了其他CBPeripheral方法。 希望有所幫助。