我想使用uitableview为IOS实现蓝牙扫描和连接模块。在执行时，没有项目添加到列表中。你能告诉我还有什么办法要显示设备名称，uuid等的蓝牙设备列表吗？
例如， 1.如何将我的对象数组设置为uitableview的数据源？ 2.单击时如何处理设备之间通过蓝牙连接？
_currentperipheral = peripheral; <--also fails at Thread 1 EXC_BREAKPOINT
以下是我的控制台消息
2014-07-11 16:34:18.286 marker[6060:60b] Scanning started
2014-07-11 17:53:14.056 marker[6115:60b] Discovered WiT Power Meter at -67
以下是我的模特课：
@interface BTDevice : NSObject {
NSString *name;
NSString *macAddress;
}
@property(nonatomic, retain) NSString *name;
@property(nonatomic, retain) NSString *macAddress;
- (NSString *)getName;
- (NSString *)getMacAddress;
- (void)setName:(NSString *)valueName;
- (void)setMacAddress:(NSString *)valueMacAddress;
@end
以下是我的工作：
- (void)viewDidLoad
{
[super viewDidLoad];
_pendingInit = YES;
_centralManager = [[CBCentralManager alloc] initWithDelegate:self queue:dispatch_get_main_queue()];
_currentperipheral=[[CBPeripheral alloc]init];
_founddevice=FALSE;
_foundPeripherals = [[NSMutableArray alloc] init];
_connectedServices = [[NSMutableArray alloc] init];
}
- (void)viewWillDisappear:(BOOL)animated {
[_centralManager stopScan];
NSLog(@"Scanning stopped");
[super viewWillDisappear:animated];
}
#pragma mark - Table view data source
- (void)tableView: (UITableView *)tableView
didSelectRowAtIndexPath: (NSIndexPath *)indexPath
{
int idx=indexPath.row;
BTSentCommandViewController * sliderVC = [self.storyboard instantiateViewControllerWithIdentifier:@"BTSentCommandViewController"];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
#warning Potentially incomplete method implementation.
// Return the number of sections.
return [_foundPeripherals count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
#warning Incomplete method implementation.
// Return the number of rows in the section.
return [_foundPeripherals count];
}
- (void)centralManagerDidUpdateState:(CBCentralManager *)central {
// You should test all scenarios
if (central.state != CBCentralManagerStatePoweredOn) {
return;
}
if (central.state == CBCentralManagerStatePoweredOn) {
// Scan for devices
[_centralManager scanForPeripheralsWithServices:nil options:nil];
NSLog(@"Scanning started");
}
}
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI {
NSLog(@"Discovered %@ at %@", peripheral.name, RSSI);
if (_currentperipheral != peripheral) {
// Save a local copy of the peripheral, so CoreBluetooth doesn't get rid of it
_currentperipheral = peripheral;
BTDevice *myDevice=[[BTDevice alloc] init];
[myDevice setName: peripheral.name];
NSString * macAddress = [NSString stringWithFormat:@"%@" , peripheral.RSSI];
[myDevice setMacAddress: macAddress] ;
[_foundPeripherals addObject:myDevice ] ;
[self.tableView reloadData];
NSLog(@"Connecting to peripheral %@", peripheral);
[_centralManager connectPeripheral:peripheral options:nil];
}
}
- (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error {
NSLog(@"Failed to connect");
[self cleanup];
}
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral {
NSLog(@"Connected");
[_centralManager stopScan];
NSLog(@"Scanning stopped");
peripheral.delegate = self;
[peripheral discoverServices:@[[CBUUID UUIDWithString:TRANSFER_SERVICE_UUID]]];
}
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error {
if (error) {
[self cleanup];
return;
}
for (CBService *service in peripheral.services) {
[peripheral discoverCharacteristics:@[[CBUUID UUIDWithString:TRANSFER_CHARACTERISTIC_UUID]] forService:service];
}
// Discover other characteristics
}
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error {
if (error) {
[self cleanup];
return;
}
for (CBCharacteristic *characteristic in service.characteristics) {
if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:TRANSFER_CHARACTERISTIC_UUID]]) {
[peripheral setNotifyValue:YES forCharacteristic:characteristic];
}
}
}
- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error {
if (error) {
NSLog(@"Error");
return;
}
NSString *stringFromData = [[NSString alloc] initWithData:characteristic.value encoding:NSUTF8StringEncoding];
if ([stringFromData isEqualToString:@"EOM"]) {
[peripheral setNotifyValue:NO forCharacteristic:characteristic];
[_centralManager cancelPeripheralConnection:peripheral];
}
//[_data appendData:characteristic.value];
}
- (void)peripheral:(CBPeripheral *)peripheral didUpdateNotificationStateForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error {
if (![characteristic.UUID isEqual:[CBUUID UUIDWithString:TRANSFER_CHARACTERISTIC_UUID]]) {
return;
}
if (characteristic.isNotifying) {
NSLog(@"Notification began on %@", characteristic);
} else {
// Notification has stopped
[_centralManager cancelPeripheralConnection:peripheral];
}
}
- (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error {
_foundPeripherals = nil;
[_centralManager scanForPeripheralsWithServices:@[[CBUUID UUIDWithString:TRANSFER_SERVICE_UUID]] options:@{ CBCentralManagerScanOptionAllowDuplicatesKey : @YES }];
}
- (void)cleanup {
// See if we are subscribed to a characteristic on the peripheral
if (_currentperipheral.services != nil) {
for (CBService *service in _currentperipheral.services) {
if (service.characteristics != nil) {
for (CBCharacteristic *characteristic in service.characteristics) {
if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:TRANSFER_CHARACTERISTIC_UUID]]) {
if (characteristic.isNotifying) {
[_currentperipheral setNotifyValue:NO forCharacteristic:characteristic];
return;
}
}
}
}
}
}
[_centralManager cancelPeripheralConnection:_currentperipheral];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"reuseIdentifier" forIndexPath:indexPath];
if (cell == nil) {
cell = [ [UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"reuseIdentifier"] ;
cell.selectionStyle = UITableViewCellSelectionStyleGray;
}
cell.textLabel.text = [_foundPeripherals objectAtIndex:indexPath.row];
// Configure the cell...
return cell;
}
答案 0 :(得分：2)
这里有很多代码，但通常看起来还不错。然而，有两件事情是突出的。您的numberOfSectionsInTableView返回0 - 因此表格中没有内容。你应该 -
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
我建议您只将CBPeripheral存储在数据阵列中。
此外，一旦发现外围设备并将其添加到阵列，您应该告知表格视图数据源已更新（此代码假定您拥有属性tableView，其中包含对您的tableview的引用） -
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI {
NSLog(@"Discovered %@ at %@", peripheral.name, RSSI);
if (![_foundPeripherals containsObject:peripheral]) {
[_foundPeripherals addObject:myDevice ] ;
[self.tableView reloadData]; // Tell the tableview that the data source has changed
}
}
然后你的cellForRowAtIndexPath变成 -
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"reuseIdentifier" forIndexPath:indexPath];
if (cell == nil) {
cell = [ [UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"reuseIdentifier"] ;
cell.selectionStyle = UITableViewCellSelectionStyleGray;
}
CBPeripheral *peripheral=[_foundPeripherals objectAtIndex:indexPath.row];
cell.textLabel.text = peripheral.name;
// Configure the cell...
return cell;
}
选择表格行时连接到外围设备 -
- (void)tableView: (UITableView *)tableView
didSelectRowAtIndexPath: (NSIndexPath *)indexPath
{
[self performSegueWithIdentifier:@"connectSegue" sender:[_foundPeripherals objectAtIndex:indexPath.row]]; // This is a segue to your BTSentCommandViewController
}
-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
BTSentCommandViewController* sliderVC=( BTSentCommandViewController *)segue.destinationViewController;
sliderVC.centralManager=_centralManager;
sliderVC.periperhal=_sender;
}
在BTSentCommandViewController中，您可以连接到外围设备。您还应将BTSentCommandViewController实例设置为外围设备委托并实施所有CBPeripheralDelegate方法