iOS蓝牙4.0开发流程

////  ViewController.m//  CoreBluetooth////  Created by rimi on 15/10/19.//  Copyright © 2015年 RIMI. All rights reserved.//#import "ViewController.h"#import <CoreBluetooth/CoreBluetooth.h>@interface ViewController ()<CBCentralManagerDelegate,CBPeripheralDelegate>@property (nonatomic,strong) NSMutableArray *peripherals;@property (nonatomic,strong) CBCentralManager *mgr;@property (nonatomic,strong) CBPeripheral *test_peripheral;@property (nonatomic,strong) CBCharacteristic   *writeCharcteristic;@property (nonatomic,strong) CBCharacteristic   *readCharcteristic;@end@implementation ViewController- (NSMutableArray *)peripherals{    if (!_peripherals) {        _peripherals = [NSMutableArray array];    }    return _peripherals;}- (void)viewDidLoad {    [super viewDidLoad];    //1.创建中心设备    CBCentralManager *mgr = [[CBCentralManager alloc]init];    self.mgr = mgr;    //设置代理    mgr.delegate = self;    //利用中心设备扫描外部设备    /*     如果指定数组代表只烧苗指定的设备     */    [mgr scanForPeripheralsWithServices:nil options:nil];    // Do any additional setup after loading the view, typically from a nib.}#pragma mark --<CBCentralManagerDelegate>- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary<NSString *,id> *)advertisementData RSSI:(NSNumber *)RSSI{    //保存扫描得到外部设备//    判断如果数组中不包含当前扫描到得外部设备才保存    if (![self.peripherals containsObject:peripheral]) {        peripheral.delegate = self;        [self.peripherals addObject:peripheral];    }}/*    模拟点击，然后连接所有的外设 */- (void)start{    for (CBPeripheral *peripheral in self.peripherals) {        [self.mgr connectPeripheral:peripheral options:nil];    }}/*    连接外设成功调用 */- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral{    //扫描外设中得服务    [peripheral discoverServices:nil];}/*    连接外设失败调用 */- (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error{    NSLog(@"failed");}#pragma mark --CBPeripheralDelegate/*    只要扫描到服务就会调用 */- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error{    //获取外设中所有扫描到得服务    NSArray *services = peripheral.services;    for (CBService *service in services) {        if ([service.UUID.UUIDString isEqualToString:@"123"]) {            //从需要的服务中查找需要的特征            //从peripheral中得service中扫描特征            [peripheral discoverCharacteristics:nil forService:service];        }    }}/*    只要扫描到特征就会调用 *  @param peripheral 特征所属的外设 *  @param service    特征所属的服务 */- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error{    //拿到服务中所有的特征    NSArray *characteristics = service.characteristics;//    便利特征，拿到需要的特征处理    for (CBCharacteristic *characteristic in characteristics) {        if ([characteristic.UUID.UUIDString isEqualToString:@"write"]) {            NSLog(@"设置闹钟");        }        if ([characteristic.UUID.UUIDString isEqualToString:@"read"]) {            NSLog(@"可读的特征");        }    }}- (void)centralManagerDidUpdateState:(CBCentralManager *)central{}//与外设做数据交互- (void)write:(NSData*)data{    [self.test_peripheral writeValue:data forCharacteristic: _writeCharcteristic type:CBCharacteristicWriteWithoutResponse];}- (void)sendMessage{    unsigned char commod[512] = {0};    unsigned char *ptmp;    int sendLength = 0;    ptmp = commod;    NSData *data = [[NSData alloc]initWithBytes:&commod length:sendLength];    [self write:data];//写入数据到特征中}//监听设备- (void)startSubscribe{    [_test_peripheral setNotifyValue:YES forCharacteristic:_readCharcteristic];}//当设备有数据返回时，同样是通过一个系统回调通知我，如下所示：- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end

苹果官方推荐文档地址：https://developer.apple.com/library/ios/samplecode/BTLE_Transfer/Listings/BTLE_Transfer_BTLECentralViewController_m.html#//apple_ref/doc/uid/DTS40012927-BTLE_Transfer_BTLECentralViewController_m-DontLinkElementID_6