最近項目中需要監(jiān)測藍(lán)牙狀態(tài),所以本文只是簡單的封裝了藍(lán)牙的開啟關(guān)閉等.

封裝類.h

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

@class LKBlueToothCentralManager;

@protocol LKBlueToothCentralManagerDelegate <NSObject>

@optional
/** 藍(lán)牙初始化中 **/
- (void)blueToothStateChangeToInitializationWithManager:(LKBlueToothCentralManager *)manager;
/** 藍(lán)牙重置 **/
- (void)blueToothStateChangeToResettingWithManager:(LKBlueToothCentralManager *)manager;
/** 設(shè)備不支持藍(lán)牙 **/
- (void)blueToothStateChangeToNotSupportedWithManager:(LKBlueToothCentralManager *)manager;
/** 設(shè)置未授權(quán)藍(lán)牙 **/
- (void)blueToothStateChangeToWantAuthorityWithManager:(LKBlueToothCentralManager *)manager;
/** 未打開藍(lán)牙狀態(tài) **/
- (void)blueToothStateChangeToUnopenedWithManager:(LKBlueToothCentralManager *)manager;
/** 藍(lán)牙開啟成功 **/
- (void)blueToothStateChangeToDidOpenWithManager:(LKBlueToothCentralManager *)manager;

@end


typedef NS_ENUM(NSInteger)
{
    LKBlueToothManagerStateInitialization = 0, // *狀態(tài)未知
    LKBlueToothManagerStateResetting = 1,      // *狀態(tài)重置
    LKBlueToothManagerStateNotSupported = 2,   // *設(shè)備不支持
    LKBlueToothManagerStateWantAuthority = 3,  // *設(shè)為未授權(quán)
    LKBlueToothManagerStateUnopened = 4,       // *設(shè)備未打開
    LKBlueToothManagerStateIsOpen = 5,         // *設(shè)備已打開
}LKBlueToothManagerState;


@interface LKBlueToothCentralManager : CBCentralManager <CBCentralManagerDelegate>

/** 添加代理 **/
+ (void)addDelegate:(id<LKBlueToothCentralManagerDelegate>)delegate;
/** 獲取當(dāng)前用戶藍(lán)牙狀態(tài) **/
+ (LKBlueToothManagerState)getCurrentBlueToothState;
/** 獲取當(dāng)前用戶藍(lán)牙狀態(tài)字符串 **/
+ (NSString *)getCurrentBlueToothStateStr;

@end

封裝類.m

#import "LKBlueToothCentralManager.h"http://這里是類名,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 @"設(shè)備重置";
        case 2:
            return @"設(shè)備不支持";
        case 3:
            return @"設(shè)備未授權(quán)";
        case 4:
            return @"未打開";
        case 5:
            return @"已打開";
        default:
            return @"";
    }
}

@end

食用方法 (′?ω?`)

#import <CoreBluetooth/CoreBluetooth.h>//系統(tǒng)的頭文件
#import "LKBlueToothCentralManager.h"http://自己封裝的類的頭文件


//點擊屏幕獲得藍(lán)牙狀態(tài)
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    NSLog(@"藍(lán)牙狀態(tài)字符串%@",[LKBlueToothCentralManager getCurrentBlueToothStateStr]);
    NSLog(@"藍(lán)牙狀態(tài)%zd--主要用來對比自定的枚舉",[LKBlueToothCentralManager getCurrentBlueToothState]);
}


//如果要使用代理來監(jiān)聽藍(lán)牙狀態(tài)變化
//先遵守自定的協(xié)議<LKBlueToothCentralManagerDelegate>
//合適的地方設(shè)置代理[LKBlueToothCentralManager addDelegate:self];//如viewDidLoad方法
//下面就是監(jiān)聽方法了

/** 藍(lán)牙初始化中 **/
- (void)blueToothStateChangeToInitializationWithManager:(LKBlueToothCentralManager *)manager
{
    NSLog(@"藍(lán)牙初始化中");
}
/** 藍(lán)牙重置 **/
- (void)blueToothStateChangeToResettingWithManager:(LKBlueToothCentralManager *)manager
{
    NSLog(@"藍(lán)牙重置");
}
/** 設(shè)備不支持藍(lán)牙 **/
- (void)blueToothStateChangeToNotSupportedWithManager:(LKBlueToothCentralManager *)manager
{
    NSLog(@"設(shè)備不支持藍(lán)牙");
}
/** 設(shè)置未授權(quán)藍(lán)牙 **/
- (void)blueToothStateChangeToWantAuthorityWithManager:(LKBlueToothCentralManager *)manager
{
    NSLog(@"設(shè)置未授權(quán)藍(lán)牙");
}
/** 未打開藍(lán)牙狀態(tài) **/
- (void)blueToothStateChangeToUnopenedWithManager:(LKBlueToothCentralManager *)manager
{
    NSLog(@"未打開藍(lán)牙狀態(tài)");
}
/** 藍(lán)牙開啟成功 **/
- (void)blueToothStateChangeToDidOpenWithManager:(LKBlueToothCentralManager *)manager
{
    NSLog(@"藍(lán)牙開啟成功");
}

so,如有錯誤，請指正(? ??_??)?

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