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前言

在之前兩篇文章中，簡(jiǎn)單的講述了在iOS中使用藍(lán)牙所需要的一些必備條件，也講述了現(xiàn)在主流的藍(lán)牙開(kāi)發(fā)庫(kù)CoreBluetooth的一些基礎(chǔ)使用與必備常識(shí)。在這一章，我將代碼附上供即將開(kāi)發(fā)藍(lán)牙的小伙伴做一個(gè)參考。

藍(lán)牙開(kāi)發(fā)流程

1.建立中心角色
2.掃描外設(shè)(Discover Peripheral)
3.連接外設(shè)(Connect Peripheral)
4.掃描外設(shè)中的服務(wù)和特征(Discover Services And Characteristics)
4.1 獲取外設(shè)的services
4.2 獲取外設(shè)的Characteristics,獲取characteristics的值,,獲取Characteristics的Descriptor和Descriptor的值
5.利用特征與外設(shè)做數(shù)據(jù)交互(Explore And Interact)
6.訂閱Characteristic的通知
7.斷開(kāi)連接(Disconnect)

實(shí)現(xiàn)步驟

1.導(dǎo)入CB頭文件,建立主設(shè)備管理類(lèi),設(shè)置主設(shè)備代理

#import <CoreBluetooth/CoreBluetooth.h>
@interface ZQBLEController () <CBCentralManagerDelegate>
@property (nonatomic, strong) CBCentralManager *cMgr; /**< 中心管理設(shè)備 */
@end
@implementation ZQBLEController
#pragma mark - 懶加載
// 1.建立中心管理者
- (CBCentralManager *)cMgr
{
    if (!_cMgr) {
        NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
        /*
         設(shè)置主設(shè)備的代理,CBCentralManagerDelegate
         必須實(shí)現(xiàn)的：
         - (void)centralManagerDidUpdateState:(CBCentralManager *)central;//主設(shè)備狀態(tài)改變調(diào)用，在初始化CBCentralManager的適合會(huì)打開(kāi)設(shè)備，只有當(dāng)設(shè)備正確打開(kāi)后才能使用
         其他選擇實(shí)現(xiàn)的委托中比較重要的：
         - (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI; //找到外設(shè)
         - (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral;//連接外設(shè)成功
         - (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error;//外設(shè)連接失敗
         - (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error;//斷開(kāi)外設(shè)
         */
        _cMgr = [[CBCentralManager alloc] initWithDelegate:self queue:dispatch_get_main_queue()]; // 線程不傳默認(rèn)是主線程
    }
    return _cMgr;
}
- (void)viewDidLoad {
    [super viewDidLoad];
    self.title = @"BLE";
    self.view.backgroundColor = [UIColor orangeColor];
    // 初始化
    [self cMgr];
    // 不能在此處掃描,因?yàn)闋顟B(tài)還沒(méi)變?yōu)榇蜷_(kāi)
    //[self.cMgr scanForPeripheralsWithServices:nil options:nil];
}

2.掃描外設(shè)

掃描的方法防治cMgr成功打開(kāi)的代理方法中
只有設(shè)備成功打開(kāi),才能開(kāi)始掃描,否則會(huì)報(bào)錯(cuò)

#pragma mark - CBCentralManagerDelegate
// 中心管理者狀態(tài)改變, 在初始化CBCentralManager的時(shí)候會(huì)打開(kāi)設(shè)備，只有當(dāng)設(shè)備正確打開(kāi)后才能使用
- (void)centralManagerDidUpdateState:(CBCentralManager *)central
{
    NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
    switch (central.state) {
        case CBCentralManagerStateUnknown:
            NSLog(@">>>CBCentralManagerStateUnknown");
            break;
        case CBCentralManagerStateResetting:
            NSLog(@">>>CBCentralManagerStateResetting");
            break;
        case CBCentralManagerStateUnsupported:
            NSLog(@">>>CBCentralManagerStateUnsupported");
            break;
        case CBCentralManagerStateUnauthorized:
            NSLog(@">>>CBCentralManagerStateUnauthorized");
            break;
        case CBCentralManagerStatePoweredOff:
            NSLog(@">>>CBCentralManagerStatePoweredOff");
            break;
        case CBCentralManagerStatePoweredOn:
            NSLog(@">>>CBCentralManagerStatePoweredOn");
            // 2.開(kāi)始掃描周?chē)耐庠O(shè)
            /*
             第一個(gè)參數(shù)nil就是掃描周?chē)械耐庠O(shè)，掃描到外設(shè)后會(huì)進(jìn)入
             - (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI;
             */
            [self.cMgr scanForPeripheralsWithServices:nil options:nil];

            break;
        default:
        break;
    }
}
// 掃描到設(shè)備會(huì)進(jìn)入到此代理方法
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary<NSString *,id> *)advertisementData RSSI:(NSNumber *)RSSI
{
    NSLog(@"%s, line = %d, per = %@, data = %@, rssi = %@", __FUNCTION__, __LINE__, peripheral, advertisementData, RSSI);
    // 接下來(lái)連接設(shè)備

3.連接外設(shè)

掃描手環(huán),打印結(jié)果
根據(jù)打印結(jié)果

// 掃描到設(shè)備會(huì)進(jìn)入到此代理方法
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary<NSString *,id> *)advertisementData RSSI:(NSNumber *)RSSI
{
    NSLog(@"%s, line = %d, per = %@, data = %@, rssi = %@", __FUNCTION__, __LINE__, peripheral, advertisementData, RSSI);

    // 3.接下來(lái)可以連接設(shè)備
    //如果你沒(méi)有設(shè)備，可以下載一個(gè)app叫l(wèi)ightbule的app去模擬一個(gè)設(shè)備
    //這里自己去設(shè)置下連接規(guī)則，我設(shè)置的是二維碼掃描到的運(yùn)動(dòng)手環(huán)的設(shè)備號(hào)
    // 判斷設(shè)備號(hào)是否掃描到
    if ([peripheral.name isEqualToString:@"OBand-75"]) {
        /*
         一個(gè)主設(shè)備最多能連7個(gè)外設(shè)，每個(gè)外設(shè)最多只能給一個(gè)主設(shè)備連接,連接成功，失敗，斷開(kāi)會(huì)進(jìn)入各自的委托
         - (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral;//連接外設(shè)成功的委托
         - (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error;//外設(shè)連接失敗的委托
         - (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error;//斷開(kāi)外設(shè)的委托
         */
        // 保存外設(shè),否則方法結(jié)束就銷(xiāo)毀
        self.per = peripheral;
        [self.cMgr connectPeripheral:self.per options:nil];
    }else
    {
        // 此處Alert提示未掃描到設(shè)備,重新掃描
#warning noCode
        NSLog(@"沒(méi)掃描到 >>>>>>>>  %s, line = %d", __FUNCTION__, __LINE__);
    }
}
// 外設(shè)連接成功
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral
{
    NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
    NSLog(@">>>連接到名稱(chēng)為（%@）的設(shè)備-成功",peripheral.name);
}
// 外設(shè)連接失敗
- (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error
{
    NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
}
// 斷開(kāi)連接(丟失連接)
- (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error
{
    NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
}

4.掃描外設(shè)中的服務(wù)和特征

 設(shè)備鏈接成功后,就可以?huà)呙柙O(shè)備的服務(wù)(services)了,同樣是通過(guò)代理,掃描到結(jié)果后會(huì)觸發(fā)某代理方法.
  注意:此時(shí)CBCentralManagerDelegate已經(jīng)不能滿(mǎn)足需求,需要新的CBPeripheralDelegate來(lái)搞定.
  該協(xié)議中包含了central與peripheral的許多回調(diào)方法
  (eg.:獲取services,獲取characteristics,獲取characteristics的值,獲取characteristics的Descriptor以及Descriptor的值,寫(xiě)數(shù)據(jù),讀RSSI,用通知的方式訂閱數(shù)據(jù)等等).

4.1 獲取外設(shè)的services
- 首先設(shè)置外設(shè)的代理,并搜尋services
- 然后在代理方法peripheral:didDiscoverServices:中遍歷services

// 外設(shè)連接成功
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral
{
    NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
    NSLog(@">>>連接到名稱(chēng)為（%@）的設(shè)備-成功",peripheral.name);
    //設(shè)置的peripheral代理CBPeripheralDelegate
    //@interface ViewController : UIViewController<CBCentralManagerDelegate,CBPeripheralDelegate>
    [peripheral setDelegate:self];

    //掃描外設(shè)Services，成功后會(huì)進(jìn)入方法：-(void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error{
    [peripheral discoverServices:nil];
    /*
     Discovers the specified services of the peripheral.
     An array of CBUUID objects that you are interested in. Here, each CBUUID object represents a UUID that identifies the type of service you want to discover.
     */
}

#pragma mark - CBPeripheralDelegate
// 發(fā)現(xiàn)外設(shè)的service
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error
{
    if (error)
    {
        NSLog(@">>>Discovered services for %@ with error: %@", peripheral.name, [error localizedDescription]);
        return;
    }

    for (CBService *service in peripheral.services) {
        NSLog(@"service.UUID = %@", service.UUID);
        //掃描每個(gè)service的Characteristics，掃描到后會(huì)進(jìn)入方法： -(void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error
        [peripheral discoverCharacteristics:nil forService:service];
    }
}

4.2 獲取外設(shè)的characteris,獲取Characteristics的值,獲取Characteristics的Descriptor以及Descriptor的值

// 外設(shè)發(fā)現(xiàn)service的特征
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error
{
    if (error)
    {
        NSLog(@"error Discovered characteristics for %@ with error: %@", service.UUID, [error localizedDescription]);
        return;
    }
    for (CBCharacteristic *characteristic in service.characteristics)
    {
        NSLog(@"service:%@ 的 Characteristic: %@",service.UUID,characteristic.UUID);
    }

#warning noCodeFor 優(yōu)化,分開(kāi)寫(xiě)是為了讓大家看注釋清晰,并不符合編碼規(guī)范

    //獲取Characteristic的值，讀到數(shù)據(jù)會(huì)進(jìn)入方法：-(void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
    
    for (CBCharacteristic *characteristic in service.characteristics){
        [peripheral readValueForCharacteristic:characteristic]; // 外設(shè)讀取特征的值
    }

    //搜索Characteristic的Descriptors，讀到數(shù)據(jù)會(huì)進(jìn)入方法：-(void)peripheral:(CBPeripheral *)peripheral didDiscoverDescriptorsForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
    for (CBCharacteristic *characteristic in service.characteristics){
        [peripheral discoverDescriptorsForCharacteristic:characteristic]; // 外設(shè)發(fā)現(xiàn)特征的描述
    }
}

// 獲取characteristic的值
- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(nonnull CBCharacteristic *)characteristic error:(nullable NSError *)error
{
    //打印出characteristic的UUID和值
    //!注意，value的類(lèi)型是NSData，具體開(kāi)發(fā)時(shí)，會(huì)根據(jù)外設(shè)協(xié)議制定的方式去解析數(shù)據(jù)
    NSLog(@"%s, line = %d, characteristic.UUID:%@  value:%@", __FUNCTION__, __LINE__, characteristic.UUID, characteristic.value);
}

// 獲取Characteristics的 descriptor的值
- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForDescriptor:(nonnull CBDescriptor *)descriptor error:(nullable NSError *)error
{
    //打印出DescriptorsUUID 和value
    //這個(gè)descriptor都是對(duì)于characteristic的描述，一般都是字符串，所以這里我們轉(zhuǎn)換成字符串去解析
    NSLog(@"%s, line = %d, descriptor.UUID:%@ value:%@", __FUNCTION__, __LINE__, descriptor.UUID, descriptor.value);
}

// 發(fā)現(xiàn)特征Characteristics的描述Descriptor
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverDescriptorsForCharacteristic:(nonnull CBCharacteristic *)characteristic error:(nullable NSError *)error
{
    NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
    for (CBDescriptor *descriptor in characteristic.descriptors) {
        NSLog(@"descriptor.UUID:%@",descriptor.UUID);
    }
}

5.寫(xiě)數(shù)據(jù)到特征中

自定義方法,為了看的更清楚,沒(méi)別的意思
需要注意的是特征的屬性是否支持寫(xiě)數(shù)據(jù)

- (void)zq_peripheral:(CBPeripheral *)peripheral writeData:(NSData *)data forCharacteristic:(CBCharacteristic *)characteristic
{
    /*
    typedef NS_OPTIONS(NSUInteger, CBCharacteristicProperties) {
        CBCharacteristicPropertyBroadcast                                                = 0x01,
        CBCharacteristicPropertyRead                                                    = 0x02,
        CBCharacteristicPropertyWriteWithoutResponse                                    = 0x04,
        CBCharacteristicPropertyWrite                                                    = 0x08,
        CBCharacteristicPropertyNotify                                                    = 0x10,
        CBCharacteristicPropertyIndicate                                                = 0x20,
        CBCharacteristicPropertyAuthenticatedSignedWrites                                = 0x40,
        CBCharacteristicPropertyExtendedProperties                                        = 0x80,
        CBCharacteristicPropertyNotifyEncryptionRequired NS_ENUM_AVAILABLE(NA, 6_0)        = 0x100,
        CBCharacteristicPropertyIndicateEncryptionRequired NS_ENUM_AVAILABLE(NA, 6_0)    = 0x200
    };
     打印出特征的權(quán)限(characteristic.properties),可以看到有很多種,這是一個(gè)NS_OPTIONS的枚舉,可以是多個(gè)值
     常見(jiàn)的又read,write,noitfy,indicate.知道這幾個(gè)基本夠用了,前倆是讀寫(xiě)權(quán)限,后倆都是通知,倆不同的通知方式
     */
     NSLog(@"%s, line = %d, char.pro = %lu", __FUNCTION__, __LINE__, (unsigned long)characteristic.properties);
     
    // 此時(shí)由于枚舉屬性是NS_OPTIONS,所以一個(gè)枚舉可能對(duì)應(yīng)多個(gè)類(lèi)型,所以判斷不能用 = ,而應(yīng)該用包含&
    if (characteristic.properties & CBCharacteristicPropertyWrite) {
        // 核心代碼在這里
        [peripheral writeValue:data // 寫(xiě)入的數(shù)據(jù)
             forCharacteristic:characteristic // 寫(xiě)給哪個(gè)特征
                          type:CBCharacteristicWriteWithResponse];// 通過(guò)此響應(yīng)記錄是否成功寫(xiě)入
    }

}

6.訂閱特征的通知

實(shí)際核心代碼是一個(gè)方法
一般這兩個(gè)方法要根據(jù)產(chǎn)品需求來(lái)確定寫(xiě)在何處


// 設(shè)置通知
- (void)zq_peripheral:(CBPeripheral *)peripheral setNotifyForCharacteristic:(CBCharacteristic *)characteristic
{
    // 外設(shè)為特征訂閱通知 數(shù)據(jù)會(huì)進(jìn)入 peripheral:didUpdateValueForCharacteristic:error:方法
    [peripheral setNotifyValue:YES forCharacteristic:characteristic];
}
// 取消通知
- (void)zq_peripheral:(CBPeripheral *)peripheral cancelNotifyForCharacteristic:(CBCharacteristic *)characteristic
{
    // 外設(shè)取消訂閱通知 數(shù)據(jù)會(huì)進(jìn)入 peripheral:didUpdateValueForCharacteristic:error:方法
    [peripheral setNotifyValue:NO forCharacteristic:characteristic];
}

7.斷開(kāi)連接

// 7.斷開(kāi)連接
- (void)zq_cMgr:(CBCentralManager *)cMgr stopScanAndDisConnectWithPeripheral:(CBPeripheral *)peripheral
{
    // 停止掃描
    [cMgr stopScan];
    // 斷開(kāi)連接
    [cMgr cancelPeripheralConnection:peripheral];
}

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進(jìn)擊藍(lán)牙之 CoreBluetooth 的代碼演示

進(jìn)擊藍(lán)牙之 CoreBluetooth 的代碼演示

前言

藍(lán)牙開(kāi)發(fā)流程

實(shí)現(xiàn)步驟

1.導(dǎo)入CB頭文件,建立主設(shè)備管理類(lèi),設(shè)置主設(shè)備代理

2.掃描外設(shè)

3.連接外設(shè)

4.掃描外設(shè)中的服務(wù)和特征

5.寫(xiě)數(shù)據(jù)到特征中

6.訂閱特征的通知

7.斷開(kāi)連接

優(yōu)秀的第三方藍(lán)牙庫(kù)

相關(guān)閱讀更多精彩內(nèi)容

友情鏈接更多精彩內(nèi)容

色偷偷精品伊人,欧洲久久精品,欧美综合婷婷骚逼,国产AV主播,国产最新探花在线,九色在线视频一区,伊人大交九 欧美,1769亚洲,黄色成人av

進(jìn)擊藍(lán)牙之 CoreBluetooth 的代碼演示

前言

藍(lán)牙開(kāi)發(fā)流程

實(shí)現(xiàn)步驟

1.導(dǎo)入CB頭文件,建立主設(shè)備管理類(lèi),設(shè)置主設(shè)備代理

2.掃描外設(shè)

3.連接外設(shè)

4.掃描外設(shè)中的服務(wù)和特征

5.寫(xiě)數(shù)據(jù)到特征中

6.訂閱特征的通知

7.斷開(kāi)連接

優(yōu)秀的第三方藍(lán)牙庫(kù)

相關(guān)閱讀更多精彩內(nèi)容

友情鏈接更多精彩內(nèi)容

色偷偷精品伊人,欧洲久久精品,欧美综合婷婷骚逼,国产AV主播,国产最新探花在线,九色在线视频一区,伊人大交九欧美,1769亚洲,黄色成人av