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:<CBPeripheral: 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 found2016-12-22 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.}