2014/10/15 下午 10:03:29

iphone Programming Glossary: abs

Optimizing CLLocationManager/CoreLocation to retrieve data points faster on the iPhone

http://stackoverflow.com/questions/1081219/optimizing-cllocationmanager-corelocation-to-retrieve-data-points-faster-on-the

boolForKey @ UseLocations self stopAllUpdates return NSDate eventDate newLocation.timestamp NSTimeInterval howRecent abs eventDate timeIntervalSinceNow attempts if newLocation.coordinate.latitude oldLocation.coordinate.latitude newLocation.coordinate.longitude..

How do I modify a GPUImageGaussianSelectiveBlurFilter to operate over a rectangle instead of a circle?

http://stackoverflow.com/questions/12257429/how-do-i-modify-a-gpuimagegaussianselectiveblurfilter-to-operate-over-a-rectangl

vec2 textureCoordinate2.x textureCoordinate2.y aspectRatio 0.5 0.5 aspectRatio textureCoordinateToUse abs excludeCirclePoint textureCoordinateToUse highp float distanceFromCenter max textureCoordinateToUse.x textureCoordinateToUse.y..

How to add line numbers to a UITextView?

http://stackoverflow.com/questions/2836162/how-to-add-line-numbers-to-a-uitextview

lineNum NSString stringWithFormat @ d x xOrigin CGRectGetMinX self.bounds yOrigin internalTextView.font.pointSize abs internalTextView.font.descender x TXT_VIEW_INSETS internalScrollView.contentOffset.y width lineNum sizeWithFont internalTextView.font..

What's the easiest way to get the current location of an iPhone?

http://stackoverflow.com/questions/459355/whats-the-easiest-way-to-get-the-current-location-of-an-iphone

interval returned from core location is more than two minutes we ignore it because it might be from an old session if abs newLocation.timestamp timeIntervalSinceDate NSDate date 120 self.currentLocation newLocation void locationManager CLLocationManager..

Drawing waveform with AVAssetReader

http://stackoverflow.com/questions/5032775/drawing-waveform-with-avassetreader

right samples totalRight right sampleTally if sampleTally samplesPerPixel left totalLeft sampleTally SInt16 fix abs left if fix normalizeMax normalizeMax fix fullSongData appendBytes left length sizeof left if channelCount 2 right.. fix fullSongData appendBytes left length sizeof left if channelCount 2 right totalRight sampleTally SInt16 fix abs right if fix normalizeMax normalizeMax fix fullSongData appendBytes right length sizeof right totalLeft 0 totalRight.. waveFormImage retain self displayWaveFormImage Logarithmic version of averaging and render methods #define absX x x 0 0 x x #define minMaxX x mn mx x mn mn x mx mx x #define noiseFloor 90.0 #define decibel amplitude 20.0 log10 absX..

Convert decimal to fraction in Objective-C?

http://stackoverflow.com/questions/5552537/convert-decimal-to-fraction-in-objective-c

into out text field double myVariable 7.5 long maxDenominator 1000 sample value Fraction myFraction fractionFromReal abs myVariable NSInteger myVariable maxDenominator theTextField setText NSString stringWithFormat @ d d d NSInteger myVariable..

How does one compare one image to another to see if they are similar by a certain percentage, on the iPhone?

http://stackoverflow.com/questions/6488732/how-does-one-compare-one-image-to-another-to-see-if-they-are-similar-by-a-certai

width xCoord 10 int img1RGB image1 getRGBForX xCoord andY yCoord int img2RGB image2 getRGBForX xCoord andY yCoord if abs img1RGB 0 img2RGB 0 25 abs img1RGB 1 img2RGB 1 25 abs img1RGB 2 img2RGB 2 25 one or more pixel components differs by 10.. image1 getRGBForX xCoord andY yCoord int img2RGB image2 getRGBForX xCoord andY yCoord if abs img1RGB 0 img2RGB 0 25 abs img1RGB 1 img2RGB 1 25 abs img1RGB 2 img2RGB 2 25 one or more pixel components differs by 10 or more numDifferences if.. andY yCoord int img2RGB image2 getRGBForX xCoord andY yCoord if abs img1RGB 0 img2RGB 0 25 abs img1RGB 1 img2RGB 1 25 abs img1RGB 2 img2RGB 2 25 one or more pixel components differs by 10 or more numDifferences if numDifferences totalCompares..

Using UIPinchGestureRecognizer to scale uiviews in single direction

http://stackoverflow.com/questions/6759028/using-uipinchgesturerecognizer-to-scale-uiviews-in-single-direction

currentTouchLocation lastTouchPosition float distance sqrt deltaMove.x deltaMove.x deltaMove.y deltaMove.y hScale abs deltaMove.x distance 1 gestureRecognizer.scale vScale abs deltaMove.y distance 1 gestureRecognizer.scale piece.transform.. sqrt deltaMove.x deltaMove.x deltaMove.y deltaMove.y hScale abs deltaMove.x distance 1 gestureRecognizer.scale vScale abs deltaMove.y distance 1 gestureRecognizer.scale piece.transform CGAffineTransformScale piece transform hScale vScale gestureRecognizer.. lastTouchPosition float distance sqrt deltaMove.x deltaMove.x deltaMove.y deltaMove.y float hScale 1 abs deltaMove.x distance 1 gestureRecognizer.scale float vScale 1 abs deltaMove.y distance 1 gestureRecognizer.scale piece.transform..

How can I format a date in Objective-C similar to the jquery.timeago library?

http://stackoverflow.com/questions/7809899/how-can-i-format-a-date-in-objective-c-similar-to-the-jquery-timeago-library

NSInteger MinInterval NSInteger HourInterval NSInteger DayInterval NSInteger DayModules NSInteger interval abs NSInteger dateTime timeIntervalSinceDate serverDateTime if interval 86400 DayInterval interval 86400 DayModules interval..

targetContentOffsetForProposedContentOffset:withScrollingVelocity without subclassing UICollectionViewFlowLayout

http://stackoverflow.com/questions/13492037/targetcontentoffsetforproposedcontentoffsetwithscrollingvelocity-without-subcla

for UICollectionViewLayoutAttributes layoutAttributes in array CGFloat itemOffset layoutAttributes.frame.origin.x if ABS itemOffset horizontalOffset ABS offsetAdjustment offsetAdjustment itemOffset horizontalOffset return CGPointMake proposedContentOffset.x.. layoutAttributes in array CGFloat itemOffset layoutAttributes.frame.origin.x if ABS itemOffset horizontalOffset ABS offsetAdjustment offsetAdjustment itemOffset horizontalOffset return CGPointMake proposedContentOffset.x offsetAdjustment..

Drawing bezier curves with my finger in iOS?

http://stackoverflow.com/questions/4672646/drawing-bezier-curves-with-my-finger-in-ios

path moveToPoint startPt path addCurveToPoint endPt controlPoint1 cPt1 controlPoint2 cPt2 void _calcDefaultControls if ABS startPt.x endPt.x ABS startPt.y endPt.y cPt1 CGPoint startPt.x endPt.x 2 startPt.y cPt2 CGPoint cPt1.x endPt.y else cPt1.. path addCurveToPoint endPt controlPoint1 cPt1 controlPoint2 cPt2 void _calcDefaultControls if ABS startPt.x endPt.x ABS startPt.y endPt.y cPt1 CGPoint startPt.x endPt.x 2 startPt.y cPt2 CGPoint cPt1.x endPt.y else cPt1 CGPoint startPt.x startPt.y..

how to make mapview zoom to 5 mile radius of current location

http://stackoverflow.com/questions/5025339/how-to-make-mapview-zoom-to-5-mile-radius-of-current-location

question Use the following code when ever you want to zoom to 5 miles radius double miles 5.0 double scalingFactor ABS cos 2 M_PI newLocation.coordinate.latitude 360.0 MKCoordinateSpan span span.latitudeDelta miles 69.0 span.longitudeDelta..

Store orientation to an array - and compare

http://stackoverflow.com/questions/6368618/store-orientation-to-an-array-and-compare

out in the MIN. If we are comparing arrays A and B then Dist i j is the distance between A i and B j . I simply used ABS A i B j . The cost matrices for this example For Array 1 we have 13 as score for Array 2 we have 5. The lower score wins..

How to use UIPanGestureRecognizer to move object? iPhone/iPad

http://stackoverflow.com/questions/6672677/how-to-use-uipangesturerecognizer-to-move-object-iphone-ipad

0 else if finalX 1024 finalX 768 if finalY 0 finalY 0 else if finalY 768 finalY 1024 CGFloat animationDuration ABS velocityX .0002 .2 NSLog @ the duration is f animationDuration UIView beginAnimations nil context NULL UIView setAnimationDuration..