藍牙使用步驟：
1. 掃描外設
2. 連接外設
3. 連上外設后，獲取指定外設的服務
4. 獲取服務后，遍歷服務的特征，得到可讀，可寫等特征，然后與中心管理者進行數據交互
附上代碼
一：導入框架
#import? <CoreBluetooth/CoreBluetooth.h>
#import <CoreLocation/CoreLocation.h>
二：設置代理，以及屬性
/**
*外設數組
*/
@property(nonatomic, strong)NSMutableArray*peripherals;
/**
*? 中心管理者
*/
@property(nonatomic, strong)CBCentralManager*mgr;
/*
*展示數據
*/
@property(nonatomic, strong)UITableView*tableView;
//外設
@property(nonatomic, strong)CBPeripheral*peripheral;
//特征
@property(nonatomic, strong)CBCharacteristic*characteristic;
三：方法實現
//懶加載重寫getter方法
- (NSMutableArray *)peripherals
{
if(!_peripherals) {
_peripherals= [NSMutableArrayarray];
}
return_peripherals;
}
- (void)viewDidLoad
{
[superviewDidLoad];
UIBarButtonItem*buttonI = [[UIBarButtonItemalloc]initWithTitle:@"掃描"style:UIBarButtonItemStylePlaintarget:selfaction:@selector(openOrclosed)];
self.navigationItem.rightBarButtonItem= buttonI;
UIBarButtonItem*buttonRB = [[UIBarButtonItemalloc]initWithTitle:@"open"style:UIBarButtonItemStylePlaintarget:selfaction:@selector(openTheDoor)];
self.navigationItem.leftBarButtonItem= buttonRB;
self.tableView= [[UITableViewalloc]initWithFrame:CGRectMake(0, 0, [UIScreenmainScreen].bounds.size.height, [UIScreenmainScreen].bounds.size.height)style:UITableViewStylePlain];
[self.viewaddSubview:self.tableView];
self.tableView.delegate=self;
self.tableView.dataSource=self;
// Do any additional setup after loading the view.
}
#pragma mark - CBCentralManagerDelegate
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI
{
// 保存掃描到得外部設備
// 判斷如果數組中不包含當前掃描到得外部設置才保存
NSLog(@"查找設備");
if (![self.peripheralscontainsObject:peripheral]) {
//? ? ? ? if ([peripheral.identifier.UUIDString isEqualToString:@""]) {
[self.peripheralsaddObject:peripheral];
//? ? ? ? peripheral.delegate = self;
[self.tableViewreloadData];
//? ? ? ? }
}
}
#pragma mark顯示數據的tableView的代理方法
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
returnself.peripherals.count;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
staticNSString *cell_id =@"cell_id";
UITableViewCell *cell = [tableViewdequeueReusableCellWithIdentifier:cell_id];
if (cell ==nil) {
cell = [[UITableViewCellalloc]initWithStyle:UITableViewCellStyleDefaultreuseIdentifier:cell_id];
}
CBPeripheral *peripheral =self.peripherals[indexPath.row];
cell.textLabel.text = peripheral.name;
return cell;
}
#pragma mark tableView的點擊事件
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
//? ? self.peripheral = self.peripherals[indexPath.row];
//? ? self.peripheral.delegate = self;
//? ? ((CBPeripheral *)self.peripherals[indexPath.row]).delegate=self;
//? ? [self.mgr connectPeripheral:self.peripherals[indexPath.row] options:nil];
self.peripheral=self.peripherals[indexPath.row];
[self.mgrconnectPeripheral:self.peripheraloptions:nil];
self.peripheral.delegate=self;
//? ? ((CBPeripheral *)self.peripherals[indexPath.row]).delegate=self;
}
/**
*掃描外設
*/
- (void)openOrclosed
{
if([self.navigationItem.rightBarButtonItem.titleisEqualToString:@"掃描"]) {
NSLog(@"掃描");
[self.navigationItem.rightBarButtonItemsetTitle:@"斷開"];
// 1.創建中心設備
//設置代理
self.mgr= [[CBCentralManageralloc] initWithDelegate:selfqueue:nil];
// 2.利用中心設備掃描外部設備
/*
如果指定數組代表只掃描指定的設備
*/
[self.mgrscanForPeripheralsWithServices:niloptions:nil];
}else {
NSLog(@"斷開");
[self.mgrstopScan];
if (self.peripheral !=nil)
{
NSLog(@"disConnect start");
[self.mgrcancelPeripheralConnection:self.peripheral];
}
self.peripherals =nil;
[self.tableViewreloadData];
[self.navigationItem.rightBarButtonItemsetTitle:@"掃描"];
}
}
/**
*? 連接外設成功調用
*/
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral
{
//? ? [self showTheAlertViewWithMassage:@"鏈接成功"];
NSLog(@"鏈接成功");
// 掃描外設中得服務
[peripheraldiscoverServices:nil];
}
/**
*? 連接外設失敗調用
*/
- (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error
{
//? ? [self showTheAlertViewWithMassage:@"鏈接失敗"];
NSLog(@"鏈接失敗");
}
#pragma makr - CBPeripheralDelegate
/**
*? 只要掃描到服務就會調用
*
*? @param peripheral服務所在的外設
*/
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error
{
NSLog(@"掃描服務");
//? ? [self showTheAlertViewWithMassage:@"掃描服務"];
// 獲取外設中所有掃描到得服務
NSArray *services = peripheral.services;
for (CBService *servicein services) {
//拿到需要的服務
NSLog(@"%@", service.UUID.UUIDString);
if ([service.UUID.UUIDStringisEqualToString:RX_SERVICE_UUID])
{
[selfshowTheAlertViewWithMassage:@"拿到了對應的服務了"];
//從需要的服務中查找需要的特征
//從peripheral中得service中掃描特征
[peripheraldiscoverCharacteristics:nilforService:service];
}
}
}
/**
*? 只要掃描到特征就會調用
*
*? @param peripheral特征所屬的外設
*? @param service特征所屬的服務
*/
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error
{
NSLog(@"掃描特征");
// 拿到服務中所有的特征
NSArray *characteristics =? service.characteristics;
// 遍歷特征, 拿到需要的特征處理
for (CBCharacteristic * characteristicin characteristics) {
if ([characteristic.UUID.UUIDStringisEqualToString:RX_CHAR_UUID]) {
//? ? ? ? ? ? [self showTheAlertViewWithMassage:@"拿到只讀的的特征了"];
NSLog(@"拿到可寫的的特征了");
//? ? ? ? ? ? characteristic.value
NSString *valueStr = [[NSStringalloc]initWithData:characteristic.valueencoding:NSUTF8StringEncoding];
NSLog(@"%@????", valueStr);
self.characteristic = characteristic;
[selfshowTheAlertViewWithMassage:valueStr];
}
if ([characteristic.UUID.UUIDStringisEqualToString:TX_CHAR_UUID]) {
}
}
}
- (void)centralManagerDidUpdateState:(CBCentralManager *)central
{
NSLog(@"檢測代理方法");
if (central.state == 5) {
[self.mgrscanForPeripheralsWithServices:niloptions:nil];
//? ? ? ? [self showTheAlertViewWithMassage:@"手機藍牙處于可用狀態"];
}
NSLog(@"%ld，%@", central.state, central);
}
#pragma mark發送消息成功
- (void)peripheral:(CBPeripheral *)peripheral didWriteValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
{
NSLog(@"發送消息的回調");
NSLog(@"----%@", error);
if (!error) {
NSLog(@"??????????");
}
}
#pragma mark處理藍牙發送過來的數據
- (void)peripheral:(CBPeripheral *)peripheral didWriteValueForDescriptor:(CBDescriptor *)descriptor error:(NSError *)error
{
NSLog(@"接收到數據");
}
- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
{
NSLog(@">>>>>>>");
if (error)
{
NSLog(@"Error updating value for characteristic %@ error: %@", characteristic.UUID, [errorlocalizedDescription]);
//? ? ? ? if ([_mainMenuDelegate respondsToSelector:@selector(DidNotifyReadError:)])
//? ? ? ? ? ? [_mainMenuDelegate DidNotifyReadError:error];
//
//? ? ? ? return;
}
NSMutableData *recvData;
[recvDataappendData:characteristic.value];
if ([recvDatalength] >= 5)//已收到長度
{
unsignedchar *buffer = (unsignedchar *)[recvDatabytes];
int nLen = buffer[3]*256 + buffer[4];
if ([recvDatalength] == (nLen+3+2+2))
{
//接收完畢，通知代理做事
//? ? ? ? ? ? if ([_mainMenuDelegate respondsToSelector:@selector(DidNotifyReadData)])
//? ? ? ? ? ? ? ? [_mainMenuDelegate DidNotifyReadData];
NSLog(@"???????");
}
}
}
- (void)didReceiveMemoryWarning
{
[superdidReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)showTheAlertViewWithMassage:(NSString *)massage
{
UIAlertView*alertV = [[UIAlertViewalloc] initWithTitle:@"溫馨提示"message:massage delegate:selfcancelButtonTitle:@"確定"otherButtonTitles:nil];
[alertVshow];
}
- (void)openTheDoor
{
NSLog(@"拿到了可讀可寫的特征了");
//? ? self.peripheral.delegate = self;
//? ? characteristic.value = [string dataUsingEncoding:NSUTF8StringEncoding];
//? ? characteristic.value = [NSData dataWithBytes:string.UTF8String length:string.length];
//? ? [self.peripheral writeValue:data forCharacteristic:self.characteristic type:CBCharacteristicWriteWithResponse];
//? ? [self.peripheral setNotifyValue:NO forCharacteristic:self.characteristic];
[selfwriteString:@"OLWANDA_IL12345678"];
}
- (void) writeString:(NSString *) string
{
NSData *data = [NSDatadataWithBytes:string.UTF8Stringlength:string.length];
// ? ? ? NSLog(@"%@",self.characteristic.UUID.UUIDString);
self.peripheral.delegate=self;
NSLog(@"%@",self.peripheral.delegate);
if((self.characteristic.properties& CBCharacteristicPropertyWriteWithoutResponse) != 0)
{
[self.peripheralwriteValue:dataforCharacteristic:self.characteristictype:CBCharacteristicWriteWithoutResponse];
}
elseif((self.characteristic.properties& CBCharacteristicPropertyWrite) != 0)
{
[self.peripheralwriteValue:dataforCharacteristic:self.characteristictype:CBCharacteristicWriteWithResponse];
}
else
{
NSLog(@"No write property on TX characteristic, %ld.",self.characteristic.properties);
}
//? ?
}
