/*
建立中心设备
扫描外设（Discover Peripheral）
连接外设（Connect Peripheral）
扫描外设中的服务和特征（Discover Services And Charateristics）
利用特征与外设做数据交互（Explore And Interact）
断开连接（Disconnect）
*/
#import "ViewController.h"
#import <coreBluetooth/CoreBluetooth.h>
@interface ViewController ()<CBCentralManagerDelegate, CBPeripheralDelegate>
@property (nonatomic, strong) CBCentralManager *mgr;
/** 发现的外设数组*/
@property (nonatomic, strong) NSMutableArray *peripheralArray;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// 1.建立中心设备
// queque:如果说你传空，在主队列
self.mgr = [[CBCentralManager alloc] initWithDelegate:self queue:nil];
// 2.扫描外设
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
// 最后一步，断开连接
[self.mgr stopScan];
}
#pragma CBCentralManagerDelegate
/*
state:
CBManagerStateUnknown = 0, 未知
CBManagerStateResetting, 重置
CBManagerStateUnsupported, 不支持
CBManagerStateUnauthorized, 未经授权
CBManagerStatePoweredOff, 没有启动
CBManagerStatePoweredOn, 开启
*/
- (void)centralManagerDidUpdateState:(CBCentralManager *)central {
NSLog(@"state = %zd", central.state);
// 蓝牙开启
if (central.state == CBManagerStateUnknown) {
NSLog(@"未知的蓝牙");
}
if (central.state == CBManagerStatePoweredOn) {
// 2.扫描外设
[self.mgr scanForPeripheralsWithServices:nil options:nil];
}
}
/**
3.连接外设（Connect Peripheral）
@param peripheral 外设
@param advertisementData 相关的二进制数据
@param RSSI 信号强度
*/
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary<NSString *,id> *)advertisementData RSSI:(NSNumber *)RSSI {
// 1.记录外设，必须要有数组进来行存储
if ([self.peripheralArray containsObject:peripheral]) {
[self.peripheralArray addObject:peripheral];
}
// 2.隐藏步骤，tableview表格列表（省略了）
// 3.连接外围设备
[self.mgr connectPeripheral:peripheral options:nil];
// 4.设置外设的代理
peripheral.delegate = self;
}
// 连接到外设之后，会调用这个代理方法
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral {
// 扫描服务
// 传nil代表扫描所有服务
[peripheral discoverServices:nil];
}
#pragma CBPeripheralDelegate
// 外设扫描里面的服务
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error {
// 获取外设的服务
for (CBService *service in peripheral.services) {
if ([service.UUID.UUIDString isEqualToString:@"123"]) {
// uuid一致，那就开始扫描特征
[peripheral discoverCharacteristics:nil forService:service];
}
}
}
// 当发现到特征的时候会调用
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error {
//
for (CBCharacteristic *characteristic in service.characteristics) {
if ([characteristic.UUID.UUIDString isEqualToString:@"123456"]) {
// [peripheral readValueForDescriptor:<#(nonnull CBDescriptor *)#>];
// [peripheral writeValue:<#(nonnull NSData *)#> forDescriptor:<#(nonnull CBDescriptor *)#>];
}
}
}
- (NSMutableArray *)peripheralArray {
if (!_peripheralArray) {
_peripheralArray = [NSMutableArray array];
}
return _peripheralArray;
}
