CoreBluetooth——IOS藍芽4.0使用心得

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原文連結：http://m.blog.csdn.net/article/details?plg_nld=1&id=51014318&plg_auth=1&plg_uin=1&plg_usr=1&plg_vkey=1&plg_nld=1&plg_d

文章出處http://blog.csdn.net/xgcyangguang

所做的東西是通過手機/pad與藍芽4.0的裝置進行串連，之後裝置上按對應的按鍵我們會收到對應的數值。首先需要和做藍芽4.0的同事溝通好通訊協定，具體的資料解析部分就不過多贅述了，主要寫一下藍芽接收資料的部分

 

1.和做藍芽的同事溝通好裝置的UUID以及特點，可以把他們寫成宏

 

#define TRANSFER_SERVICE_UUID           @"0000fff0-0000-1000-8000-00805f9b34fb"#define TRANSFER_CHARACTERISTIC_UUID    @"0000fff7-0000-1000-8000-00805f9b34fb"

 

2.在.H檔案中匯入兩個標頭檔，並在介面中實現兩個協議

 

#import "ViewController.h"#import <CoreBluetooth/CoreBluetooth.h>#import "UUID.h"//需要實現協議@interface ViewController () < CBCentralManagerDelegate, CBPeripheralDelegate>{}

3.建立兩個藍牙裝置屬性，一個相當於主機，一個相當於外設從機

#pragma mark 藍牙裝置@property (strong, nonatomic) CBCentralManager      *centralManager;         //接收@property (strong, nonatomic) CBPeripheral          *discoveredPeripheral;   //外設@end

4.開始藍芽配置

#pragma mark 在初始化介面結束後設定自己為代理- (void)viewDidLoad {    [super viewDidLoad];       _centralManager = [[CBCentralManager alloc] initWithDelegate:self queue:nil];}#pragma mark 此處監控一下中央的狀態值，可以判斷藍芽是否開啟/可用- (void)centralManagerDidUpdateState:(CBCentralManager *)central{    NSMutableString *stringForCentralManagerState = [NSMutableString stringWithString:@"UpdateState:"];        switch (central.state) {        case CBCentralManagerStateUnknown:            [stringForCentralManagerState appendString:@"Unkown\n"];            break;        case CBCentralManagerStateUnsupported:            [stringForCentralManagerState appendString:@"Unsupported\n"];        case CBCentralManagerStateUnauthorized:            [stringForCentralManagerState appendString:@"Unauthorized\n"];        case CBCentralManagerStateResetting:            [stringForCentralManagerState appendString:@"Resetting\n"];        case CBCentralManagerStatePoweredOff:            [stringForCentralManagerState appendString:@"PowerOff\n"];        case CBCentralManagerStatePoweredOn:            //裝置支援BLE並且可用            [stringForCentralManagerState appendString:@"PoweredOn\n"];                        //開始搜尋            [self scan];            break;        default:            [stringForCentralManagerState appendString:@"none\n"];            break;    }    NSLog(@"%@", stringForCentralManagerState);}#pragma mark 掃描- (void)scan{        //第一個參數如果設定為nil，會尋找所有service    [self.centralManager scanForPeripheralsWithServices:@[[CBUUID UUIDWithString:TRANSFER_SERVICE_UUID]]     options:@{ CBCentralManagerScanOptionAllowDuplicatesKey : @YES }];              NSLog(@"Scanning started");}#pragma mark 發現裝置,串連//一旦符合要求的裝置被發現，就會回調此方法- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI{        NSLog(@"Discovered %@ at %@", peripheral.name, RSSI);        if (self.discoveredPeripheral != peripheral) {                self.discoveredPeripheral = peripheral;                // 串連        NSLog(@"Connecting to peripheral %@", peripheral);        [self.centralManager connectPeripheral:peripheral options:nil];    }}#pragma mark 未能串連的處理方法- (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error{    NSLog(@"Failed to connect to %@. (%@)", peripheral, [error localizedDescription]);//    [self cleanup];}#pragma mark 當串連上裝置- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral{    NSLog(@"Peripheral Connected");        // 已串連上裝置，故停止搜尋    [self.centralManager stopScan];    NSLog(@"Scanning stopped");    // Make sure we get the discovery callbacks    peripheral.delegate = self;        // 尋找指定UUID的Service    [peripheral discoverServices:@[[CBUUID UUIDWithString:TRANSFER_SERVICE_UUID]]];}#pragma mark 發現裝置上指定Service會回調此處- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error{    if (error) {        NSLog(@"Error discovering services: %@", [error localizedDescription]);        return;    }        // 尋找指定UUID的Characteristic    for (CBService *service in peripheral.services) {        [peripheral discoverCharacteristics:@[[CBUUID UUIDWithString:TRANSFER_CHARACTERISTIC_UUID]] forService:service];    }}#pragma mark 找到指定UUID的Characteristic會回調此處- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error{    if (error) {        NSLog(@"Error discovering characteristics: %@", [error localizedDescription]);         return;    }        for (CBCharacteristic *characteristic in service.characteristics) {        if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:TRANSFER_CHARACTERISTIC_UUID]]) {            NSLog(@"find the characteristic");                                    [peripheral setNotifyValue:YES forCharacteristic:characteristic];                    }    }}- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{    if (error) {                       NSLog(@"Error discovering characteristics: %@", [error localizedDescription]);        return;    }        NSLog(@"value --> %@",characteristic.value);   #pragma mark 把接收到的資料進行截取//此處我們就可以拿到value值對其進行資料解析了    NSData *data = characteristic.value; }

#pragma mark 藍芽斷開後自動重連-(void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error{        NSLog(@"Peripheral Disconnected");    self.discoveredPeripheral = nil;    [self scan];        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"藍芽串連狀態" message:@"串連已斷開" delegate:nil cancelButtonTitle:@"確定" otherButtonTitles:@"關閉", nil];    [alert show];   }

5.藍芽後台運行

若要實現藍芽4.0在APP進入後台時仍能工作，傳輸資料，不用寫代碼，只需要修改xxx-info.plist檔案即可

在所需的背景模式中加入兩項

使用CoreBluetooth應用程式共用資料  和   應用程式進行通訊使用CoreBluetooth即可

CoreBluetooth——IOS藍芽4.0使用心得