摄像头

/// 先判断摄像头硬件是否好用
    if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
    {
        // 用户是否允许摄像头使用
        NSString * mediaType = AVMediaTypeVideo;
        AVAuthorizationStatus  authorizationStatus = [AVCaptureDevice authorizationStatusForMediaType:mediaType];
        // 不允许弹出提示框
        if (authorizationStatus == AVAuthorizationStatusRestricted|| authorizationStatus == AVAuthorizationStatusDenied)
        {
            UIAlertView *alterView=[[UIAlertView alloc]initWithTitle:@\"提示\" message:@\"请前往设置,开启相机权限\" delegate:self cancelButtonTitle:@\"好的\" otherButtonTitles: nil];
            [alterView show];
        }
        else
        {
            // 这里是摄像头可以使用的处理逻辑
            [self instanceDevice];
        }
    }
    else
    {
        // 硬件问题提示
        UIAlertView *alterView=[[UIAlertView alloc]initWithTitle:@\"提示\" message:@\"请检查手机摄像头设备\" delegate:self cancelButtonTitle:@\"好的\" otherButtonTitles: nil];
        [alterView show];
    }

蓝牙

- (void)centralManagerDidUpdateState:(CBCentralManager *)central {
    
    switch (central.state) {
        case CBCentralManagerStatePoweredOn:
        {
            _manager = [XMBleManager sharedBluetoothManager];
            [_manager checkBleState];
            _manager.connectFailedCallback = ^(NSString *str) {
                [HemaFunction openIntervalHUD:str];
            };
        }
            break;
        default:
        {
            if (!isFirst)
            {
                UIAlertView *alterView=[[UIAlertView alloc]initWithTitle:@\"提示\" message:@\"请检查蓝牙设置\" delegate:self cancelButtonTitle:@\"好的\" otherButtonTitles: nil];
                [alterView show];
            }
            isFirst = YES;
            
            
        }
            break;
    }
}

定位

需要先导入#import <CoreLocation/CoreLocation.h>

CLAuthorizationStatus status = [CLLocationManager authorizationStatus];
    if ([CLLocationManager locationServicesEnabled] && kCLAuthorizationStatusDenied != status && kCLAuthorizationStatusRestricted != status)
    {
        // 开始定位，搜索附近位置
        [self startLocation];
    }
    else
    {
        [HemaFunction openIntervalHUD:@\"定位尚未打开，请设置打开\"];
    }