当手在传感器周围移动时，接近传感器打开

Question

我正在开发一个应用程序，当用户在接近传感器周围移动时，我想打开接近传感器，并获得类似0的接近状态值。当用户移动手第二时间值为1时，我该怎么做我知道如何启用接近，但我想在用户移动手绕过代理时启用接近。那么我该怎么做呢？我试过这个代码。以实现接近。

UIDevice * device=[UIDevice currentDevice];
    device.proximityMonitoringEnabled=YES;
    if (device.proximityMonitoringEnabled)
    {
        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(handleProximityChange:)
                                                     name:UIDeviceProximityStateDidChangeNotification
                                         object:nil];
    }
    else
    {
        NSLog(@"Device not capable to support Proximity sensor");
        // device not capable
    }

并在这种方法中捕捉接近状态。。。

-(void)handleProximityChange:(NSNotification *)notification
{
    NSLog(@"Proximity event catch");
}

我会按照用户的要求来做这个代码，所以我可以这样做吗？请帮我做。

Answer 1

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    count = 0;
    condition = 0;
    [self addProximitySensorControl];
}
-(void)addProximitySensorControl {
    UIDevice *device = [UIDevice currentDevice];
    device.proximityMonitoringEnabled = YES;
    BOOL state = device.proximityState;
    if(state)
    {
        NSLog(@"YES");
        _sensorSupport.text = @"YES";
    }
    else
    {
        NSLog(@"NO");
     _sensorSupport.text = @"No";
    }
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(proximityChanged:)
                                                 name:@"UIDeviceProximityStateDidChangeNotification"
                                               object:nil];
}
-(void)proximityChanged:(NSString*)str
{
    NSLog(@"i am in proximityChanged");
    condition++;
    if (condition % 2 == 0) {
        count++;
    }
    _counter.text = [NSString stringWithFormat:@"%d",count];
}