ios蓝牙使用demo

简单粗暴上代码
步骤解释请看另一篇 http://blog.csdn.net/swibyn/article/details/20531593
demo下载 http://download.csdn.net/detail/swibyn/9717588

#import "TableViewController.h"
#import "CoreBluetooth/CoreBluetooth.h"

#pragma mark - CBPeripheral Category
//扩展，主要是界面显示用
@interface CBPeripheral (Text)

-(NSString *)stateText;

@end

@implementation CBPeripheral (Text)

-(NSString *)stateText{
    NSArray *array = @[@"Disconnected",@"Connecting",@"Connected",@"Disconnecting"];
    NSInteger index = self.state;
    return array[index];
}

@end

#pragma mark - NSString Category
@interface NSString (Category)

@property (readonly) NSData *hexData;

@end

@implementation NSString (Category)

-(NSData *)hexData{
    NSUInteger len = [self length] / 2;    // Target length
    unsigned char *buf = malloc(len);
    unsigned char *whole_byte = buf;
    char byte_chars[3] = {'\0','\0','\0'};

    int i;
    for (i=0; i < [self length] / 2; i++) {
        byte_chars[0] = [self characterAtIndex:i*2];
        byte_chars[1] = [self characterAtIndex:i*2+1];
        *whole_byte = strtol(byte_chars, NULL, 16);
        whole_byte++;
    }

    NSData *data = [NSData dataWithBytes:buf length:len];
    free( buf );
    return data;
}

@end


#pragma mark - TableViewController

@interface TableViewController ()<CBCentralManagerDelegate,CBPeripheralDelegate>

@property CBCentralManager* centralManger;
@property NSMutableArray* peripherals;

@end

@implementation TableViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    self.centralManger = [[CBCentralManager alloc] initWithDelegate:self queue:nil];
    self.peripherals = [NSMutableArray array];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark  utils

#pragma mark  Action
- (IBAction)scanBarButtonAction:(id)sender {
    for (CBPeripheral* peripheral in self.peripherals) {
        if (peripheral.state != CBPeripheralStateDisconnected) {
            [self.centralManger cancelPeripheralConnection:peripheral];
        }
    }
    [self.peripherals removeAllObjects];

    [self.centralManger scanForPeripheralsWithServices:nil options:nil];
}

#pragma mark  Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

    return self.peripherals.count;
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
    CBPeripheral *peripheral = self.peripherals[indexPath.row];
    // Configure the cell...
    cell.textLabel.text = peripheral.name;
    cell.detailTextLabel.text = peripheral.stateText;

    return cell;
}

#pragma mark  Table view Delegate
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    CBPeripheral *peripheral = self.peripherals[indexPath.row];
    if (peripheral.state == CBPeripheralStateConnected) {
        [self.centralManger cancelPeripheralConnection:peripheral];
    }else if(peripheral.state == CBPeripheralStateDisconnected){
        [self.centralManger connectPeripheral:peripheral options:nil];
    }
}

#pragma mark  CBCentralManagerDelegate
-(void)centralManagerDidUpdateState:(CBCentralManager *)central{

}

-(void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral{
    NSLog(@"%s",__FUNCTION__);
    peripheral.delegate = self;
    [peripheral discoverServices:nil];
    [self.tableView reloadData];
}

-(void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error{
    NSLog(@"%s",__FUNCTION__);
    NSLog(@"error:%@",error);
    [self.tableView reloadData];
}

-(void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error{
    NSLog(@"%s",__FUNCTION__);
}

-(void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary<NSString *,id> *)advertisementData RSSI:(NSNumber *)RSSI{

    NSLog(@"peripheral:%@",peripheral);
    NSLog(@"advertisementData:%@",advertisementData);
    [self.peripherals addObject:peripheral];
    [self.tableView reloadData];
}


#pragma mark  CBPeripheralDelegate

-(void)peripheralDidUpdateName:(CBPeripheral *)peripheral{

}

-(void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error{
    NSLog(@"%s",__FUNCTION__);
    for (CBService *service in peripheral.services) {
        [peripheral discoverCharacteristics:nil forService:service];
    }
}

-(void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error{
    NSLog(@"%s",__FUNCTION__);
    if ([service.UUID.UUIDString isEqualToString:@"EDBC"]) {//你需要的service UUID
        for (CBCharacteristic *characteristic in service.characteristics) {
            if ([characteristic.UUID.UUIDString isEqualToString:@"ED01"]) {//你需要的characteristic UUID
                NSLog(@"EDBC  ED01 found");
                [peripheral setNotifyValue:YES forCharacteristic:characteristic];

                NSData *data = @"0209010000000201000002".hexData;
                NSLog(@"write:%@",data);
                [peripheral writeValue:data forCharacteristic:characteristic type:CBCharacteristicWriteWithResponse];
                return;
            }
        }
    }
}

-(void)peripheral:(CBPeripheral *)peripheral didWriteValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{
    NSLog(@"%s",__FUNCTION__);
}

-(void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{
    NSLog(@"%s",__FUNCTION__);
    NSLog(@"value:%@",characteristic.value);
}

@end

执行步骤
1，搜索设备 scanBarButtonAction
2，点击列表中的设备 tableView:didSelectRowAtIndexPath:
3，peripheral主动断开

打印的日志如下：

2016-12-22 09:47:19.776 Bluetooth[193:3829] peripheral:0x15e802b0, identifier = 54D36F04-3DCC-90C9-1AAA-6A453A821FEA, name = eID_00213200333, state = disconnected>
2016-12-22 09:47:19.778 Bluetooth[193:3829] advertisementData:{
    kCBAdvDataIsConnectable = 1;
    kCBAdvDataLocalName = "eID_00213200333";
    kCBAdvDataServiceUUIDs =     (
        EDBC
    );
}
2016-12-22 09:47:20.585 Bluetooth[193:3829] -[TableViewController centralManager:didConnectPeripheral:]
2016-12-22 09:47:20.907 Bluetooth[193:3829] -[TableViewController peripheral:didDiscoverServices:]
2016-12-22 09:47:21.027 Bluetooth[193:3829] -[TableViewController peripheral:didDiscoverCharacteristicsForService:error:]
2016-12-22 09:47:21.028 Bluetooth[193:3829] EDBC  ED01 found
2016-12-22 09:47:21.029 Bluetooth[193:3829] write:<02090100 00000201 000002>
2016-12-22 09:47:21.296 Bluetooth[193:3829] -[TableViewController peripheral:didWriteValueForCharacteristic:error:]
2016-12-22 09:47:21.298 Bluetooth[193:3829] -[TableViewController peripheral:didUpdateValueForCharacteristic:error:]
2016-12-22 09:47:21.299 Bluetooth[193:3829] value:<020b0100 4c000000 02004c00 03>
2016-12-22 09:47:31.632 Bluetooth[193:3829] -[TableViewController centralManager:didDisconnectPeripheral:error:]
2016-12-22 09:47:31.632 Bluetooth[193:3829] error:Error Domain=CBErrorDomain Code=6 "The connection has timed out unexpectedly." UserInfo={NSLocalizedDescription=The connection has timed out unexpectedly.}