最近项目中需要监测蓝牙状态,所以本文只是简单的封装了蓝牙的开启关闭等.

封装类.h

#import <CoreBluetooth/CoreBluetooth.h>
#import <Foundation/Foundation.h>

@class LKBlueToothCentralManager;

@protocol LKBlueToothCentralManagerDelegate <NSObject>

@optional
/** 蓝牙初始化中 **/
- (void)blueToothStateChangeToInitializationWithManager:(LKBlueToothCentralManager *)manager;
/** 蓝牙重置 **/
- (void)blueToothStateChangeToResettingWithManager:(LKBlueToothCentralManager *)manager;
/** 设备不支持蓝牙 **/
- (void)blueToothStateChangeToNotSupportedWithManager:(LKBlueToothCentralManager *)manager;
/** 设置未授权蓝牙 **/
- (void)blueToothStateChangeToWantAuthorityWithManager:(LKBlueToothCentralManager *)manager;
/** 未打开蓝牙状态 **/
- (void)blueToothStateChangeToUnopenedWithManager:(LKBlueToothCentralManager *)manager;
/** 蓝牙开启成功 **/
- (void)blueToothStateChangeToDidOpenWithManager:(LKBlueToothCentralManager *)manager;

@end


typedef NS_ENUM(NSInteger)
{
    LKBlueToothManagerStateInitialization = 0, // *状态未知
    LKBlueToothManagerStateResetting = 1,      // *状态重置
    LKBlueToothManagerStateNotSupported = 2,   // *设备不支持
    LKBlueToothManagerStateWantAuthority = 3,  // *设为未授权
    LKBlueToothManagerStateUnopened = 4,       // *设备未打开
    LKBlueToothManagerStateIsOpen = 5,         // *设备已打开
}LKBlueToothManagerState;


@interface LKBlueToothCentralManager : CBCentralManager <CBCentralManagerDelegate>

/** 添加代理 **/
+ (void)addDelegate:(id<LKBlueToothCentralManagerDelegate>)delegate;
/** 获取当前用户蓝牙状态 **/
+ (LKBlueToothManagerState)getCurrentBlueToothState;
/** 获取当前用户蓝牙状态字符串 **/
+ (NSString *)getCurrentBlueToothStateStr;

@end

封装类.m

#import "LKBlueToothCentralManager.h"//这里是类名,改成自己的

@interface LKBlueToothCentralManager ()
{
    id<LKBlueToothCentralManagerDelegate> _myDelegate;
}
@end

@implementation LKBlueToothCentralManager

static LKBlueToothCentralManager *_manager;
+(void)load
{
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        _manager = [[LKBlueToothCentralManager alloc] init];
        _manager.delegate = _manager.self;
    });
}

+ (void)addDelegate:(id<LKBlueToothCentralManagerDelegate>)delegate
{
    _manager -> _myDelegate = delegate;
}



- (void)centralManagerDidUpdateState:(CBCentralManager *)central
{
    switch (central.state) {
        case 0:
            if ([_myDelegate respondsToSelector:@selector(blueToothStateChangeToInitializationWithManager:)])
            {
                [_myDelegate blueToothStateChangeToInitializationWithManager:_manager];
            }
            break;
        case 1:
            if ([_myDelegate respondsToSelector:@selector(blueToothStateChangeToResettingWithManager:)])
            {
                [_myDelegate blueToothStateChangeToResettingWithManager:_manager];
            }
            break;
        case 2:
            if ([_myDelegate respondsToSelector:@selector(blueToothStateChangeToNotSupportedWithManager:)])
            {
                [_myDelegate blueToothStateChangeToNotSupportedWithManager:_manager];
            }
            break;
        case 3:
            if ([_myDelegate respondsToSelector:@selector(blueToothStateChangeToWantAuthorityWithManager:)])
            {
                [_myDelegate blueToothStateChangeToWantAuthorityWithManager:_manager];
            }
            break;
        case 4:
            if ([_myDelegate respondsToSelector:@selector(blueToothStateChangeToUnopenedWithManager:)])
            {
                [_myDelegate blueToothStateChangeToUnopenedWithManager:_manager];
            }
            break;
        case 5:
            if ([_myDelegate respondsToSelector:@selector(blueToothStateChangeToDidOpenWithManager:)])
            {
                [_myDelegate blueToothStateChangeToDidOpenWithManager:_manager];
            }
            break;
        default:
            break;
    }
}

+ (LKBlueToothManagerState)getCurrentBlueToothState
{
    switch (_manager.state) {
        case 0:
            return LKBlueToothManagerStateInitialization;
        case 1:
            return LKBlueToothManagerStateResetting;
        case 2:
            return LKBlueToothManagerStateNotSupported;
        case 3:
            return LKBlueToothManagerStateWantAuthority;
        case 4:
            return LKBlueToothManagerStateUnopened;
        case 5:
            return LKBlueToothManagerStateIsOpen;
        default:
            return -1;
    }
}

+ (NSString *)getCurrentBlueToothStateStr
{
    switch (_manager.state) {
        case 0:
            return @"初始化中";
        case 1:
            return @"设备重置";
        case 2:
            return @"设备不支持";
        case 3:
            return @"设备未授权";
        case 4:
            return @"未打开";
        case 5:
            return @"已打开";
        default:
            return @"";
    }
}

@end

食用方法 (´・ω・`)

#import <CoreBluetooth/CoreBluetooth.h>//系统的头文件
#import "LKBlueToothCentralManager.h"//自己封装的类的头文件


//点击屏幕获得蓝牙状态
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    NSLog(@"蓝牙状态字符串%@",[LKBlueToothCentralManager getCurrentBlueToothStateStr]);
    NSLog(@"蓝牙状态%zd--主要用来对比自定的枚举",[LKBlueToothCentralManager getCurrentBlueToothState]);
}


//如果要使用代理来监听蓝牙状态变化
//先遵守自定的协议<LKBlueToothCentralManagerDelegate>
//合适的地方设置代理[LKBlueToothCentralManager addDelegate:self];//如viewDidLoad方法
//下面就是监听方法了

/** 蓝牙初始化中 **/
- (void)blueToothStateChangeToInitializationWithManager:(LKBlueToothCentralManager *)manager
{
    NSLog(@"蓝牙初始化中");
}
/** 蓝牙重置 **/
- (void)blueToothStateChangeToResettingWithManager:(LKBlueToothCentralManager *)manager
{
    NSLog(@"蓝牙重置");
}
/** 设备不支持蓝牙 **/
- (void)blueToothStateChangeToNotSupportedWithManager:(LKBlueToothCentralManager *)manager
{
    NSLog(@"设备不支持蓝牙");
}
/** 设置未授权蓝牙 **/
- (void)blueToothStateChangeToWantAuthorityWithManager:(LKBlueToothCentralManager *)manager
{
    NSLog(@"设置未授权蓝牙");
}
/** 未打开蓝牙状态 **/
- (void)blueToothStateChangeToUnopenedWithManager:(LKBlueToothCentralManager *)manager
{
    NSLog(@"未打开蓝牙状态");
}
/** 蓝牙开启成功 **/
- (void)blueToothStateChangeToDidOpenWithManager:(LKBlueToothCentralManager *)manager
{
    NSLog(@"蓝牙开启成功");
}

so,如有错误，请指正(ง •̀_•́)ง

demo地址 https://github.com/lk13227/blueToothMonitor