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2014/10/15 ¤U¤È 10:15:12
iphone Programming Glossary: uiaccelerometerhow to detect and program around shakes for the iphone http://stackoverflow.com/questions/1340492/how-to-detect-and-program-around-shakes-for-the-iphone iphone iphone sdk 3.0 delegates shake share improve this question You should absolutely not be listening to UIAccelerometer directly with your own filtering to handle shake events. That is a high power operation and should only be used by apps..
How do you implement a Highpass filter for the IPhone accelerometer? http://stackoverflow.com/questions/142944/how-do-you-implement-a-highpass-filter-for-the-iphone-accelerometer forums #define kFilteringFactor 0.1 static UIAccelerationValue rollingX 0 rollingY 0 rollingZ 0 void accelerometer UIAccelerometer accelerometer didAccelerate UIAcceleration acceleration Subtract the low pass value from the current value to get a simplified..
Enable iPhone accelerometer while screen is locked http://stackoverflow.com/questions/2529422/enable-iphone-accelerometer-while-screen-is-locked questions 1551712 running iphone apps while in sleep mode However after testing with the example code UIAccelerometer will just stop giving value as soon as the device is locked pronto. Is there a way to force otherwise iphone sleep accelerometer..
What is meant by .delegate=self? http://stackoverflow.com/questions/4211947/what-is-meant-by-delegate-self bigTop UIViewController ASIHTTPRequestDelegate UIPopoverControllerDelegate @interface flying UIViewController UIAccelerometerDelegate You can see that 'bigTop' wants to use two delegates the ASIHTTPRequestDelegate and the UIPopoverControllerDelegate... might use a dozen such delegates. In the example of flying above somewhere in the code for flying it would have to say UIAccelerometer sharedAccelerometer setDelegate self . Note that UIAccelerometer is a singleton. In the case of bigTop it would have to.. somewhere in the code for flying it would have to say UIAccelerometer sharedAccelerometer setDelegate self . Note that UIAccelerometer is a singleton. In the case of bigTop it would have to set the delegate somewhere for the ASIHttpRequests ASIFormDataRequest..
Tap pressure strength detection using accelerometer http://stackoverflow.com/questions/5179426/tap-pressure-strength-detection-using-accelerometer CPBPressureHard 0.8f #define CPBPressureInfinite 2.0f @interface CPBPressureTouchGestureRecognizer UIGestureRecognizer UIAccelerometerDelegate @public float pressure float minimumPressureRequired float maximumPressureRequired @private float pressureValues.. setup minimumPressureRequired CPBPressureNone maximumPressureRequired CPBPressureInfinite pressure CPBPressureNone UIAccelerometer sharedAccelerometer setUpdateInterval 1.0f kUpdateFrequency UIAccelerometer sharedAccelerometer setDelegate self #pragma.. pressure CPBPressureNone UIAccelerometer sharedAccelerometer setUpdateInterval 1.0f kUpdateFrequency UIAccelerometer sharedAccelerometer setDelegate self #pragma #pragma UIAccelerometerDelegate methods void accelerometer UIAccelerometer..
Accelerometer Low Pass Filtering http://stackoverflow.com/questions/6942626/accelerometer-low-pass-filtering it's fairly jumpy. They then suggest to apply a low pass filter to it by changing the original code void accelerometer UIAccelerometer accelerometer didAccelerate UIAcceleration acceleration HypnosisView hv HypnosisView self view hv setXShift 10.0 acceleration.. view hv setXShift 10.0 acceleration x hv setYShift 10.0 acceleration y hv setNeedsDisplay to this void accelerometer UIAccelerometer accelerometer didAccelerate UIAcceleration acceleration HypnosisView hv HypnosisView self view float xShift hv xShift 0.8.. something about low pass filters which suggests the following code #define kFilteringFactor 0.1 void accelerometer UIAccelerometer accelerometer didAccelerate UIAcceleration acceleration Use a basic low pass filter to keep only the gravity component of..
http://stackoverflow.com/questions/706344/lock-unlock-events-iphone NSLog @ STATUS Application will Resign Active Start checking the accelerometer while we are in the background UIAccelerometer sharedAccelerometer setDelegate self UIAccelerometer sharedAccelerometer setUpdateInterval 1 Ping every second _notActiveTimer.. Start checking the accelerometer while we are in the background UIAccelerometer sharedAccelerometer setDelegate self UIAccelerometer sharedAccelerometer setUpdateInterval 1 Ping every second _notActiveTimer NSTimer scheduledTimerWithTimeInterval 2 target.. selector @selector deviceDidLock userInfo nil repeats NO 2 seconds for wiggle Deprecated in iOS5 void accelerometer UIAccelerometer accelerometer didAccelerate UIAcceleration acceleration NSLog @ STATUS Update from accelerometer _notActiveTimer invalidate..
Detect iPhone screen orientation http://stackoverflow.com/questions/999686/detect-iphone-screen-orientation angle but even when the phone is flat I get readings varying wildly a few times a second. void checkOrientation UIAccelerometer accelerometer didAccelerate UIAcceleration acceleration int accelerationX acceleration.x kfilteringFactor accelerationX..
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