iphone - 当手绕传感器移动时，接近传感器打开

Question

我正在开发一个应用程序，我想在用户将手移到接近传感器上时获得接近传感器，并获得接近状态值(如0)。当用户第二次移动手的时间值变为1时，我该怎么做？我知道如何启用接近度但是我想在用户绕过代理移动时启用接近。所以我该怎么做呢？使接近。

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
    }

并以这种方法捕捉接近状态...

-(void)handleProximityChange:(NSNotification *)notification
{

    NSLog(@"Proximity event catch");

}

我将按照每个用户的身份来执行此代码，因此我可以执行此操作，请帮助我执行此操作。

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];
}