IOS BLE 蓝牙实现方式

//
//  ViewController.m
//  BleTemperatureDemo
//
//  Created by jacob on 16/3/9.
//  Copyright © 2016年 jacob. All rights reserved.
//

#import "ViewController.h"
#import <CoreBluetooth/CoreBluetooth.h>

//电池的service uuid
static NSString *BATTERY_SERVICE = @"1xxx";
//电池的特征值的UUID
static NSString *BATTERY_READ_CHAR = @"2Axx";
//体温数据的service UUID
static NSString *HEALTH_SERVICE = @"1xxx";
//体温特征值的UUID
static NSString *HEALTH_READ_CHAR = @"2xxx";

@interface ViewController () <CBCentralManagerDelegate,CBPeripheralDelegate>
@property (weak, nonatomic) IBOutlet UILabel *labelState;
@property (weak, nonatomic) IBOutlet UILabel *labelTemperature;
@property (weak, nonatomic) IBOutlet UILabel *labelBattery;

@property(nonatomic,strong) CBCentralManager *bleManager;
@property(nonatomic,strong) NSMutableArray *multArray;
@property(nonatomic,strong) CBPeripheral *myPeripheral;

- (IBAction)startScan:(UIButton *)sender;
- (IBAction)stopScan:(UIButton *)sender;

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
_bleManager = [[CBCentralManager alloc]initWithDelegate:self queue:nil];
}

- (void)centralManagerDidUpdateState:(CBCentralManager *)central{
NSLog(@"centralManagerDidUpdateState");
switch (central.state) {
case CBCentralManagerStatePoweredOff:
NSLog(@"蓝牙已关闭");
break;
case CBCentralManagerStatePoweredOn:
NSLog(@"蓝牙已打开");
break;
case CBCentralManagerStateUnsupported:
NSLog(@"不支持蓝牙");
break;

default:
break;
}
}

-(void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary<NSString *,id> *)advertisementData RSSI:(NSNumber *)RSSI{
NSLog(@"peripheral--:%@",peripheral);
if ([peripheral.name containsString:@"Thermometer"]) {

self.labelState.text = @"已发现设备";
peripheral.delegate = self;
NSLog(@"开始连接设备");
self.myPeripheral = peripheral;
[self.bleManager connectPeripheral:self.myPeripheral options:nil];

}
}

/**
*连接上设备的信息回调,连接上设备后，开始发现服务
*/
-(void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral{
NSLog(@"设备连接成功，准备扫描服务");

[peripheral discoverServices:nil];

self.labelState.text  = @"设备连接成功";
}

-(void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error{
self.labelState.text  = @"设备已经断开";
if (error) {
NSLog(@"didDisconnectPeripheral with error : %@",error);
return;
}
}

/**
扫描外设服务的数据回调
*/
-(void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error{

if (error) {
NSLog(@"didDiscoverServices with error : %@",error);
return;
}

for (CBService *service in peripheral.services) {
NSLog(@"service uuid: %@",service.UUID.UUIDString);
if ([service.UUID.UUIDString isEqualToString:BATTERY_SERVICE]) {
NSLog(@"已经发现电池对应的服务");
[peripheral discoverCharacteristics:nil forService:service];
}

if ([service.UUID.UUIDString isEqualToString:HEALTH_SERVICE]) {
NSLog(@"已经发现体温数据对应的服务");
[peripheral discoverCharacteristics:nil forService:service];
}
}
}

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

NSLog(@"发现服务 %@, 特性数: %ld", service.UUID, [service.characteristics count]);
if (error) {
NSLog(@"didDiscoverCharacteristicsForService with error : %@",error);
return;
}

//电池电量的数据直接读对应的特征值即可
if ([service.UUID.UUIDString isEqualToString:BATTERY_SERVICE]) {
for (CBCharacteristic *character in service.characteristics) {
if ([character.UUID.UUIDString isEqualToString:BATTERY_READ_CHAR]) {
NSLog(@"已找到電池对应服务中的 特征值");
[peripheral readValueForCharacteristic:character];

}
}
}

//体温数据需要通过notify的方式进行获取
if ([service.UUID.UUIDString isEqualToString:HEALTH_SERVICE]) {
for (CBCharacteristic *character in service.characteristics) {
if ([character.UUID.UUIDString isEqualToString:HEALTH_READ_CHAR]) {
NSLog(@"已找到体温对应服务中的 特征值");
[peripheral setNotifyValue:YES forCharacteristic:character];
}
}
}

}

/**
read 或者 notify的方式都会在这个函数中返回数据
*/
-(void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{
if (error) {
NSLog(@"didUpdateValueForCharacteristic with error : %@",error);
return;
}

NSData *data = characteristic.value;
NSLog(@"收到数据啦 %@---%@", data,characteristic.UUID);

//电量数据
if ([characteristic.UUID.UUIDString isEqualToString:BATTERY_READ_CHAR]) {
int battery;
[data getBytes: &battery length: sizeof(battery)];
self.labelBattery.text = [NSString stringWithFormat:@"%d",battery];
}

//体温数据
if ([characteristic.UUID.UUIDString isEqualToString:HEALTH_READ_CHAR]) {
Byte *testByte = (Byte *)[data bytes];
Byte orgin[4];
orgin[0] = testByte[1];
orgin[1] = testByte[2];
orgin[2] = testByte[3];

NSData *chidata=[NSData dataWithBytes:orgin length:4];
int code;
[chidata getBytes:&code length:4];
//NSInteger temp = [self byteToInt:orgin];
self.labelTemperature.text = [NSString stringWithFormat:@"%.2f",(0.1+0.01*code)];
}

}

- (IBAction)startScan:(UIButton *)sender {
[self.bleManager scanForPeripheralsWithServices:nil options:@{CBCentralManagerScanOptionAllowDuplicatesKey:@(YES)}];
NSLog(@"开始扫描");

}

- (IBAction)stopScan:(UIButton *)sender {
NSLog(@"停止扫描");
[self.bleManager stopScan ];
[self.bleManager cancelPeripheralConnection:self.myPeripheral];

self.labelBattery.text = @"";
self.labelState.text = @"";
self.labelTemperature.text = @"";
}
@end