ios 随时检测蓝牙是否开启_iOS 获取设备蓝牙状态-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_39827728/article/details/111494184

本文介绍了如何在iOS应用中检测蓝牙状态，包括初始化`CBCentralManager`，实现代理方法以监听蓝牙状态变化，并在蓝牙关闭时弹出提示引导用户前往设置界面开启蓝牙。

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1.导入头文件 #import

2.添加

3.@property (nonatomic, strong) CBCentralManager *centralManager;

4.初始化属性

- (void)subPropertiesInit {// 初始化属性

// 初始化管理者

// CBCentralManagerOptionShowPowerAlertKey

//_centralManager = [[CBCentralManager alloc] initWithDelegate:self queue:nil];

_centralManager = [[CBCentralManager alloc] initWithDelegate:self queue:nil options:@{CBCentralManagerOptionShowPowerAlertKey: [NSNumber numberWithBool:NO]}];

}

5.实现代理 #pragma mark -- CBCentralManagerDelegate

- (void)centralManagerDidUpdateState:(CBCentralManager*)central

{

switch(central.state) {

case CBManagerStateUnknown:

NSLog(@"central.state = CBManagerStateUnknown");

break;

case CBManagerStateResetting:

{

//[self showAlertViewTitle:@"Note!" message:@"Your apple device has bluetooth reset, please close the APP and reopen." rescan:NO];

NSLog(@"central.state = CBManagerStateResetting .........iPhone正在重置蓝牙");

}

break;

case CBManagerStateUnsupported:

NSLog(@"central.state = CBManagerStateUnsupported");

break;

case CBManagerStateUnauthorized:

NSLog(@"central.state = CBManagerStateUnauthorized");

break;

case CBManagerStatePoweredOff: {

NSLog(@"centralManager 未开启蓝牙..");

[self bluetoothAlert];

// 代理监控蓝牙未开启,状态改为正在扫描中

}

break;

case CBManagerStatePoweredOn:

{

NSLog(@"centralManager 已开启蓝牙..");

}

break;

}

6.前往设置界面开启蓝牙 #pragma mark - alert

-(void)bluetoothAlert{

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"前往设置界面开启蓝牙功能" message:@"" preferredStyle:UIAlertControllerStyleAlert];

UIAlertAction *setBtn = [UIAlertAction actionWithTitle:@"开启蓝牙" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

[self ibeaconState];

}];

UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];

[alertController addAction:setBtn];

[alertController addAction:cancelAction];

[self presentViewController:alertController animated:YES completion:nil];

}

7.跳转设置界面

-(void)ibeaconState{

NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];

[[UIApplication sharedApplication]openURL:url];