开源 Objective-C IOS 应用开发（十二）通讯--ble

Objective-C实现iOS蓝牙BLE广播

原创已于 2025-11-21 11:28:33 修改 · 841 阅读

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#开源 #objective-c #ios

于 2025-11-16 00:15:00 首次发布

linux C 到 IOS App开发专栏收录该内容

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文章的目的为了记录使用Objective-C 进行IOS app 开发学习的经历。本职为嵌入式软件开发，公司安排开发app，临时学习，完成app的开发。开发流程和要点有些记忆模糊，赶紧记录，防止忘记。

相关链接：

开源 Objective-C IOS 应用开发（一）macOS 的使用

开源 Objective-C IOS 应用开发（二）Xcode安装

开源 Objective-C IOS 应用开发（三）第一个iPhone的APP

开源 Objective-C IOS 应用开发（四）Xcode工程文件结构

开源 Objective-C IOS 应用开发（五）iOS操作（action）和输出口（Outlet）

开源 Objective-C IOS 应用开发（六）Objective-C 和 C语言

开源 Objective-C IOS 应用开发（七）Objective-C核心代码示例

开源 Objective-C IOS 应用开发（八）常见控件UI

开源 Objective-C IOS 应用开发（九）复杂控件-tableview

开源 Objective-C IOS 应用开发（十）数据持久化--文件

开源 Objective-C IOS 应用开发（十一）数据持久化--sqlite

开源 Objective-C IOS 应用开发（十二）通讯--ble

开源 Objective-C IOS 应用开发（十三）通讯--Http访问

开源 Objective-C IOS 应用开发（十四）传感器--陀螺仪和gps

开源 Objective-C IOS 应用开发（十五）通讯--蓝牙ble扫描

开源 Objective-C IOS 应用开发（十六）Storyboard模式下的纯代码界面

开源 Objective-C IOS 应用开发（十七）CAF音频的录制

开源 Objective-C IOS 应用开发（十八）音频的播放

开源 Objective-C IOS 应用开发（十九）视频的播放

开源 Objective-C IOS 应用开发（二十）多线程处理

开源 Objective-C IOS 应用开发（二十一）自定义控件--示波器

开源 Objective-C IOS 应用开发（二十二）自定义控件--车速仪表盘

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开源 Arkts 鸿蒙应用开发（三）Arkts的介绍-优快云博客

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开源 Arkts 鸿蒙应用开发（六）数据持久--文件和首选项存储-优快云博客

开源 Arkts 鸿蒙应用开发（七）数据持久--sqlite关系数据库-优快云博客

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开源 Arkts 鸿蒙应用开发（十二）传感器的使用-优快云博客

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开源 Arkts 鸿蒙应用开发（十八）通讯--Ble低功耗蓝牙服务器-优快云博客

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开源 java android app 开发（二）工程文件结构-优快云博客

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开源 java android app 开发（十）广播机制-优快云博客

开源 java android app 开发（十一）调试、发布-优快云博客

开源 java android app 开发（十二）封库.aar-优快云博客

本章内容主要是BLE 广播应用，文本框可以输入设备名称，点击发送进行广播。

1.手机演示

2.所有源码

3.源码分析

一、手机演示

左边为ipone app，右边为安卓的ble调试助手

二、所有源码

AppDelegate.h

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

@end

AppDelegate.m

#import "AppDelegate.h"
#import "ViewController.h"

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
    ViewController *viewController = [[ViewController alloc] init];
    self.window.rootViewController = viewController;
    [self.window makeKeyAndVisible];
    return YES;
}

@end

ViewController.h

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

@interface ViewController : UIViewController <CBPeripheralManagerDelegate, UITextFieldDelegate>

@property (nonatomic, strong) CBPeripheralManager *peripheralManager;
@property (nonatomic, strong) UITextField *nameTextField;
@property (nonatomic, strong) UIButton *startButton;
@property (nonatomic, strong) UIButton *stopButton;
@property (nonatomic, strong) UILabel *statusLabel;

@end

ViewController.m

#import "ViewController.h"

@interface ViewController ()

@property (nonatomic, assign) BOOL isAdvertising;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self setupUI];
    [self setupBLE];
}

- (void)setupUI {
    self.view.backgroundColor = [UIColor whiteColor];
    
    // 标题
    UILabel *titleLabel = [[UILabel alloc] init];
    titleLabel.text = @"BLE广播发送器";
    titleLabel.textAlignment = NSTextAlignmentCenter;
    titleLabel.textColor = [UIColor blackColor];
    titleLabel.font = [UIFont boldSystemFontOfSize:24];
    titleLabel.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:titleLabel];
    
    // 设备名称标签
    UILabel *nameLabel = [[UILabel alloc] init];
    nameLabel.text = @"设备名称:";
    nameLabel.textColor = [UIColor blackColor];
    nameLabel.font = [UIFont systemFontOfSize:16];
    nameLabel.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:nameLabel];
    
    // 设备名称输入框
    self.nameTextField = [[UITextField alloc] init];
    self.nameTextField.placeholder = @"输入BLE设备名称";
    self.nameTextField.borderStyle = UITextBorderStyleRoundedRect;
    self.nameTextField.text = @"MyBLEDevice";
    self.nameTextField.delegate = self;
    self.nameTextField.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:self.nameTextField];
    
    // 状态标签
    self.statusLabel = [[UILabel alloc] init];
    self.statusLabel.text = @"准备就绪";
    self.statusLabel.textAlignment = NSTextAlignmentCenter;
    self.statusLabel.textColor = [UIColor grayColor];
    self.statusLabel.font = [UIFont systemFontOfSize:16];
    self.statusLabel.numberOfLines = 0;
    self.statusLabel.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:self.statusLabel];
    
    // 开始广播按钮
    self.startButton = [UIButton buttonWithType:UIButtonTypeSystem];
    [self.startButton setTitle:@"开始广播" forState:UIControlStateNormal];
    [self.startButton addTarget:self action:@selector(startAdvertising) forControlEvents:UIControlEventTouchUpInside];
    self.startButton.backgroundColor = [UIColor systemGreenColor];
    self.startButton.tintColor = [UIColor whiteColor];
    self.startButton.titleLabel.font = [UIFont boldSystemFontOfSize:18];
    self.startButton.layer.cornerRadius = 10;
    self.startButton.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:self.startButton];
    
    // 停止广播按钮
    self.stopButton = [UIButton buttonWithType:UIButtonTypeSystem];
    [self.stopButton setTitle:@"停止广播" forState:UIControlStateNormal];
    [self.stopButton addTarget:self action:@selector(stopAdvertising) forControlEvents:UIControlEventTouchUpInside];
    self.stopButton.backgroundColor = [UIColor systemRedColor];
    self.stopButton.tintColor = [UIColor whiteColor];
    self.stopButton.titleLabel.font = [UIFont boldSystemFontOfSize:18];
    self.stopButton.layer.cornerRadius = 10;
    self.stopButton.translatesAutoresizingMaskIntoConstraints = NO;
    self.stopButton.enabled = NO;
    self.stopButton.backgroundColor = [UIColor systemGrayColor];
    [self.view addSubview:self.stopButton];
    
    // 说明标签
    UILabel *infoLabel = [[UILabel alloc] init];
    infoLabel.text = @"模式: 不可连接广播 - 无任何服务";
    infoLabel.textAlignment = NSTextAlignmentCenter;
    infoLabel.textColor = [UIColor lightGrayColor];
    infoLabel.font = [UIFont systemFontOfSize:14];
    infoLabel.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:infoLabel];
    
    // 设置约束
    [self setupConstraintsWithTitleLabel:titleLabel nameLabel:nameLabel infoLabel:infoLabel];
    
    // 添加点击手势隐藏键盘
    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dismissKeyboard)];
    [self.view addGestureRecognizer:tapGesture];
}

- (void)setupConstraintsWithTitleLabel:(UILabel *)titleLabel nameLabel:(UILabel *)nameLabel infoLabel:(UILabel *)infoLabel {
    [NSLayoutConstraint activateConstraints:@[
        // 标题约束
        [titleLabel.topAnchor constraintEqualToAnchor:self.view.safeAreaLayoutGuide.topAnchor constant:20],
        [titleLabel.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor constant:20],
        [titleLabel.trailingAnchor constraintEqualToAnchor:self.view.trailingAnchor constant:-20],
        [titleLabel.heightAnchor constraintEqualToConstant:40],
        
        // 名称标签约束
        [nameLabel.topAnchor constraintEqualToAnchor:titleLabel.bottomAnchor constant:40],
        [nameLabel.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor constant:20],
        [nameLabel.widthAnchor constraintEqualToConstant:80],
        [nameLabel.heightAnchor constraintEqualToConstant:40],
        
        // 名称输入框约束
        [self.nameTextField.topAnchor constraintEqualToAnchor:titleLabel.bottomAnchor constant:40],
        [self.nameTextField.leadingAnchor constraintEqualToAnchor:nameLabel.trailingAnchor constant:10],
        [self.nameTextField.trailingAnchor constraintEqualToAnchor:self.view.trailingAnchor constant:-20],
        [self.nameTextField.heightAnchor constraintEqualToConstant:40],
        
        // 状态标签约束
        [self.statusLabel.topAnchor constraintEqualToAnchor:self.nameTextField.bottomAnchor constant:30],
        [self.statusLabel.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor constant:20],
        [self.statusLabel.trailingAnchor constraintEqualToAnchor:self.view.trailingAnchor constant:-20],
        [self.statusLabel.heightAnchor constraintEqualToConstant:60],
        
        // 开始按钮约束
        [self.startButton.topAnchor constraintEqualToAnchor:self.statusLabel.bottomAnchor constant:40],
        [self.startButton.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor constant:50],
        [self.startButton.trailingAnchor constraintEqualToAnchor:self.view.trailingAnchor constant:-50],
        [self.startButton.heightAnchor constraintEqualToConstant:50],
        
        // 停止按钮约束
        [self.stopButton.topAnchor constraintEqualToAnchor:self.startButton.bottomAnchor constant:20],
        [self.stopButton.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor constant:50],
        [self.stopButton.trailingAnchor constraintEqualToAnchor:self.view.trailingAnchor constant:-50],
        [self.stopButton.heightAnchor constraintEqualToConstant:50],
        
        // 说明标签约束
        [infoLabel.bottomAnchor constraintEqualToAnchor:self.view.safeAreaLayoutGuide.bottomAnchor constant:-20],
        [infoLabel.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor constant:20],
        [infoLabel.trailingAnchor constraintEqualToAnchor:self.view.trailingAnchor constant:-20],
        [infoLabel.heightAnchor constraintEqualToConstant:30]
    ]];
}

- (void)setupBLE {
    self.peripheralManager = [[CBPeripheralManager alloc] initWithDelegate:self queue:dispatch_get_main_queue()];
    self.isAdvertising = NO;
}

- (void)dismissKeyboard {
    [self.nameTextField resignFirstResponder];
}

#pragma mark - Button Actions

- (void)startAdvertising {
    [self dismissKeyboard];
    
    if (self.peripheralManager.state != CBManagerStatePoweredOn) {
        self.statusLabel.text = @"错误: 蓝牙未开启";
        return;
    }
    
    if (self.isAdvertising) {
        self.statusLabel.text = @"错误: 已在广播中";
        return;
    }
    
    NSString *deviceName = [self.nameTextField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
    if (deviceName.length == 0) {
        self.statusLabel.text = @"错误: 请输入设备名称";
        return;
    }
    
    [self startNonConnectableAdvertisingWithName:deviceName];
}

- (void)stopAdvertising {
    if (self.isAdvertising) {
        [self.peripheralManager stopAdvertising];
        self.isAdvertising = NO;
        self.statusLabel.text = @"广播已停止";
        self.startButton.enabled = YES;
        self.stopButton.enabled = NO;
        self.startButton.backgroundColor = [UIColor systemGreenColor];
        self.stopButton.backgroundColor = [UIColor systemGrayColor];
        NSLog(@"BLE广播已停止");
    }
}

#pragma mark - 不可连接广播实现

- (void)startNonConnectableAdvertisingWithName:(NSString *)deviceName {
    // 使用空的Service UUIDs数组来实现不可连接广播
    // 空的UUID数组表示设备没有可用的服务，因此不可连接
    NSDictionary *advertisementData = @{
        CBAdvertisementDataLocalNameKey : deviceName,
        CBAdvertisementDataServiceUUIDsKey : @[] // 空数组 - 关键！
    };
    
    [self.peripheralManager startAdvertising:advertisementData];
    self.statusLabel.text = [NSString stringWithFormat:@"正在广播: %@\n设备不可连接", deviceName];
    NSLog(@"开始不可连接广播，设备名称: %@", deviceName);
}

#pragma mark - CBPeripheralManagerDelegate

- (void)peripheralManagerDidUpdateState:(CBPeripheralManager *)peripheral {
    NSString *stateString;
    UIColor *statusColor = [UIColor grayColor];
    
    switch (peripheral.state) {
        case CBManagerStatePoweredOn:
            stateString = @"蓝牙已就绪\n请输入设备名称并开始广播";
            statusColor = [UIColor systemBlueColor];
            self.startButton.enabled = YES;
            self.startButton.backgroundColor = [UIColor systemGreenColor];
            break;
        case CBManagerStatePoweredOff:
            stateString = @"蓝牙未开启\n请打开系统蓝牙设置";
            statusColor = [UIColor systemRedColor];
            self.startButton.enabled = NO;
            self.startButton.backgroundColor = [UIColor systemGrayColor];
            break;
        case CBManagerStateUnauthorized:
            stateString = @"未授权蓝牙权限\n请在设置中允许蓝牙访问";
            statusColor = [UIColor systemOrangeColor];
            self.startButton.enabled = NO;
            self.startButton.backgroundColor = [UIColor systemGrayColor];
            break;
        case CBManagerStateUnsupported:
            stateString = @"设备不支持BLE";
            statusColor = [UIColor systemRedColor];
            self.startButton.enabled = NO;
            self.startButton.backgroundColor = [UIColor systemGrayColor];
            break;
        default:
            stateString = @"蓝牙状态未知";
            self.startButton.enabled = NO;
            self.startButton.backgroundColor = [UIColor systemGrayColor];
            break;
    }
    
    self.statusLabel.text = stateString;
    self.statusLabel.textColor = statusColor;
    NSLog(@"蓝牙状态: %@", stateString);
}

- (void)peripheralManagerDidStartAdvertising:(CBPeripheralManager *)peripheral error:(NSError *)error {
    if (error) {
        self.statusLabel.text = [NSString stringWithFormat:@"广播启动失败\n%@", error.localizedDescription];
        self.statusLabel.textColor = [UIColor systemRedColor];
        NSLog(@"广播错误: %@", error.localizedDescription);
        
        self.isAdvertising = NO;
        self.startButton.enabled = YES;
        self.stopButton.enabled = NO;
        self.startButton.backgroundColor = [UIColor systemGreenColor];
        self.stopButton.backgroundColor = [UIColor systemGrayColor];
    } else {
        NSString *deviceName = [self.nameTextField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
        self.statusLabel.text = [NSString stringWithFormat:@"广播成功: %@\n设备不可连接", deviceName];
        self.statusLabel.textColor = [UIColor systemGreenColor];
        
        self.isAdvertising = YES;
        self.startButton.enabled = NO;
        self.stopButton.enabled = YES;
        self.startButton.backgroundColor = [UIColor systemGrayColor];
        self.stopButton.backgroundColor = [UIColor systemRedColor];
        NSLog(@"不可连接广播已成功启动: %@", deviceName);
    }
}

#pragma mark - UITextFieldDelegate

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    [textField resignFirstResponder];
    return YES;
}

- (void)textFieldDidBeginEditing:(UITextField *)textField {
    // 编辑时停止广播
    if (self.isAdvertising) {
        [self stopAdvertising];
    }
}

@end

main.m

#import <UIKit/UIKit.h>
#import "AppDelegate.h"

int main(int argc, char * argv[]) {
    @autoreleasepool {
        return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
    }
}

info.plist

<key>NSBluetoothAlwaysUsageDescription</key>
<string>此应用需要蓝牙权限来发送BLE广播</string>
<key>NSBluetoothPeripheralUsageDescription</key>
<string>此应用需要蓝牙权限来发送BLE广播</string>

三、源码分析

1. 项目架构概述

这是一个基于 CoreBluetooth 框架的 iOS 应用，主要功能是作为 BLE 外设发送不可连接的广播信号。

2. 核心组件分析

2.1 AppDelegate - 应用入口

objective-c

// 创建主窗口和根视图控制器
self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
ViewController *viewController = [[ViewController alloc] init];
self.window.rootViewController = viewController;