iOS 蓝牙4.0开发

点击上方“iOS开发”，选择“置顶公众号”

关键时刻，第一时间送达！

背景：

1.iOS的蓝牙不能用来传输文件。

2.iOS与iOS设备之间进行数据通信，使用gameKit.framework

3.iOS与其他非iOS设备进行数据通信，使用coreBluetooth.framework

iOS中蓝牙的实现方案

iOS中提供了4个框架用于实现蓝牙连接

GameKit.framework（用法简单）

只能用于iOS设备之间的连接，多用于游戏（比如五子棋对战），从iOS7开始过期

MultipeerConnectivity.framework

只能用于iOS设备之间的连接，从iOS7开始引入，主要用于文件共享（仅限于沙盒的文件）

ExternalAccessory.framework

可用于第三方蓝牙设备交互，但是蓝牙设备必须经过苹果MFi认证（国内较少）

CoreBluetooth.framework（时下热门）

可用于第三方蓝牙设备交互，必须要支持蓝牙4.0

硬件至少是4s，系统至少是iOS6

蓝牙4.0以低功耗著称，一般也叫BLE（BluetoothLowEnergy）

目前应用比较多的案例：运动手坏、嵌入式设备、智能家居

下面具体介绍使用CoreBluetooth.framework的代码步骤：

//蓝牙系统库

#import

//必须要由UUID来唯一标示对应的service和characteristic

#define kServiceUUID @"5C476471-1109-4EBE-A826-45B4F9D74FB9"

#define kCharacteristicHeartRateUUID @"82C7AC0F-6113-4EC9-92D1-5EEF44571398"

#define kCharacteristicBodyLocationUUID @"537B5FD6-1889-4041-9C35-F6949D1CA034"

@interface ViewController ()

@property (nonatomic,strong)CBCentralManager * centralManager;

@property (nonatomic,strong)CBPeripheral    * peripheral;

@end

1.创建中心角色

#import

- (void)viewDidLoad

{

[super viewDidLoad];

//初始化蓝牙 central manager

_centralManager = [[CBCentralManager alloc]initWithDelegate:self queue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0) options:nil];

}

2.扫描外设

[manager scanForPeripheralsWithServices:nil options:@{CBCentralManagerRestoredStateScanOptionsKey:@(YES)}];

3.连接外设

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

{

if([peripheral.name  isEqualToString:BLE_SERVICE_NAME]){

[self connect:peripheral];

}

s);

}

-(BOOL)connect:(CBPeripheral *)peripheral{

self.manager.delegate = self;

[self.manager connectPeripheral:peripheral

options:[NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES] forKey:CBConnectPeripheralOptionNotifyOnDisconnectionKey]];

}

4.扫描外设中的服务和特征

- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral

{

NSLog(@"Did connect to peripheral: %@", peripheral);

_testPeripheral = peripheral;

[peripheral setDelegate:self];  

//查找服务

[peripheral discoverServices:nil];

}

发现服务：

- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error

{

NSLog(@"didDiscoverServices");

if (error)

{

NSLog(@"Discovered services for %@ with error: %@", peripheral.name, [error localizedDescription]);

if ([self.delegate respondsToSelector:@selector(DidNotifyFailConnectService:withPeripheral:error:)])

[self.delegate DidNotifyFailConnectService:nil withPeripheral:nil error:nil];

return;

}

for (CBService *service in peripheral.services)

{

//发现服务

if ([service.UUID isEqual:[CBUUID UUIDWithString:UUIDSTR_ISSC_PROPRIETARY_SERVICE]])

{

NSLog(@"Service found with UUID: %@", service.UUID);  

//查找特征

[peripheral discoverCharacteristics:nil forService:service];

break;

}

}

}

发现服务中的特征：

- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error

{

if (error)

{

NSLog(@"Discovered characteristics for %@ with error: %@", service.UUID, [error localizedDescription]);

[self error];

return;

}

NSLog(@"服务：%@",service.UUID);

for (CBCharacteristic *characteristic in service.characteristics)

{

//发现特征

if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:@"xxxxxxx"]]) {

NSLog(@"监听：%@",characteristic);

//监听特征

[self.peripheral setNotifyValue:YES forCharacteristic:characteristic];

}

}

}

5.与外设进行数据交互

读取数据：

- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error

{

if (error)

{

NSLog(@"Error updating value for characteristic %@ error: %@", characteristic.UUID, [error localizedDescription]);

self.error_b = BluetoothError_System;

[self error];

return;

}

//    NSLog(@"收到的数据：%@",characteristic.value);

[self decodeData:characteristic.value];

}

写数据：

NSData *d2 = [[PBABluetoothDecode sharedManager] HexStringToNSData:@"0x02"];

[self.peripheral writeValue:d2 forCharacteristic:characteristic type:CBCharacteristicWriteWithoutResponse];

• 作者：DeveKin176打键盘

• 链接：http://www.jianshu.com/p/70133307f260

• iOS开发整理发布，转载请联系作者授权

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