2014/10/15 下午 10:04:51

iphone Programming Glossary: calculates

OpenGL ES 2.0 texture distortion on large geometry GL_REPEAT

http://stackoverflow.com/questions/11370074/opengl-es-2-0-texture-distortion-on-large-geometry-gl-repeat

the hardware works. You can work around the issue by using nearest filter texture lookup in a fragment program which calculates the texture lookup modulo your texture tile size and position and does its linear filtering manually. share improve this..

How do I break down an NSTimeInterval into year, months, days, hours, minutes and seconds on iPhone?

http://stackoverflow.com/questions/1237778/how-do-i-break-down-an-nstimeinterval-into-year-months-days-hours-minutes-an

and 16 hours off. If I set the date picker to 1 day in the past I am off by the same amount. Update I have an app that calculates your age in years given your birthday set from a UIDatePicker yet it was often off. This proves there was an inaccuracy..

iPhone App floating point calculations when released to the app store.

http://stackoverflow.com/questions/14210621/iphone-app-floating-point-calculations-when-released-to-the-app-store

App floating point calculations when released to the app store. I released my first solo iPhone app last week that calculates 12V Marine and Boat Battery usage . I had tested it vigorously on the simulator and on my iPhone and when I was comfortable..

Is there a way to programmatically scroll to a PDF page within a UIWebView?

http://stackoverflow.com/questions/1927841/is-there-a-way-to-programmatically-scroll-to-a-pdf-page-within-a-uiwebview

that contains a UIToolbar a UIWebView and conforms to the UIWebViewDelegate protocol. My PDFViewerViewController calculates some information about the enclosing web view and the PDF data after the web view delegate method webViewDidFinishLoad gets..

Measuring velocity via iPhone SDK

http://stackoverflow.com/questions/1994018/measuring-velocity-via-iphone-sdk

I need. It seems possible based on very few other apps I've seen notably gMeter which claims to make no use of GPS but calculates velocity accurately. I'm really surprised there are no references or any sample code that demonstrates this anywhere that..

where to start with audio synthesis on iPhone

http://stackoverflow.com/questions/2067267/where-to-start-with-audio-synthesis-on-iphone

C Csharp D Dsharp E F Fsharp G Gsharp Bflat Asharp Dflat Csharp Eflat Dsharp Gflat Fsharp Aflat Gsharp Helper function calculates fundamental frequency for a given note float CalculateFrequencyFromNote SInt32 semiTones SInt32 octave 4 float CalculateFrequencyFromMIDINote..

sizeWithFont doesn't give correct height for UITextView if there is a long string in the text being wrapped

http://stackoverflow.com/questions/2330939/sizewithfont-doesnt-give-correct-height-for-uitextview-if-there-is-a-long-strin

by 2 or 3 hundred character strings. At the moment if I try to use this method on these long strings it incorrectly calculates them and I end up with lots of whitespace at the bottom of the UITextView. I've tried using UILineBreakModeWordWrap and..

Using the apple FFT and accelerate Framework

http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework

in the documentation. A.realp float malloc nOver2 sizeof float A.imagp float malloc nOver2 sizeof float Next it pre calculates everything that can be precalculated. note that if you are doing this in real code you probably want to do this once when..

Can example “GLImageProcessing” work with multi filters

http://stackoverflow.com/questions/4375479/can-example-glimageprocessing-work-with-multi-filters

2 Src t Dst 0.5 t can be simplified because Dst is a constant grey . That results in 2 Src t 0.25 0.5 t Unit0 calculates Src t Unit1 adds 0.25 0.5 t Since 0.5 t will be in 0..0.5 it can be biased up and the addition done in signed space. glActiveTexture..

UILabel's sizeToFit/sizeThatFits ignore the numberoflines property

http://stackoverflow.com/questions/5041874/uilabels-sizetofit-sizethatfits-ignore-the-numberoflines-property

Setting the frame after creation rather than passing it to the init function. Invoking sizeToFit and hoping it calculates the height assuming present width but it doesn't. Calling sizeToFit and then calling sizeThatFits. Invoking layoutIfNeeded...

AVAssetWritter does not work with audio

http://stackoverflow.com/questions/5200077/avassetwritter-does-not-work-with-audio

Your code looks valid as you are calculating the time difference for each received packet. However AVFoundation calculates this for you and also optimizes the timestamps for placement in the interleaved container. Another thing I am unsure of..

how do I calculate heightForRowAtIndexPath when the cell is not even constructed yet?

http://stackoverflow.com/questions/5294356/how-do-i-calculate-heightforrowatindexpath-when-the-cell-is-not-even-constructed

it Only thing I can think of for the moment is to 1. In your custom UITableViewCell subclass create a method that calculates the heights of each subview e.g. UILabel that is in the UITableViewCell subclass then use this within the cell subclass..

Need to find Distance using Gyro+Accelerometer

http://stackoverflow.com/questions/6647314/need-to-find-distance-using-gyroaccelerometer

to find Distance using Gyro Accelerometer I want to build an app that calculates accurate Distance travelled by iPhone not long distance using Gyro Accelerometer. No need for GPS here. Can you help me..

iPhone - Moving a CLLocation by x meters

http://stackoverflow.com/questions/7278094/iphone-moving-a-cllocation-by-x-meters

resulting lat2 and lon2 that it returns Given a starting lat lon point on earth distance in meters and bearing calculates destination coordinates lat2 lon2. all params in degrees void destCoordsInDegrees double lat1 double lon1 double distanceMeters..

How to disable scrolling in UITableView table when the content fits on the screen

http://stackoverflow.com/questions/7410845/how-to-disable-scrolling-in-uitableview-table-when-the-content-fits-on-the-scree

table.scrollEnabled NO else table.scrollEnabled YES I run this code after calling reloadData on the table and it calculates the right sizes and appears to work. table.frame.size.height is the actual size of the object you can see this in Interface..

How to call a function in applicationDidEnterBackground?

http://stackoverflow.com/questions/7443131/how-to-call-a-function-in-applicationdidenterbackground

an object to access it but it seems that function is getting killed when called. Here is the function it basically calculates the distance and postes a notification void calculateDistance for NSMutableDictionary obj in placeName CLLocation userLocation..

Debugging crash in CoreGraphics/MapKit

http://stackoverflow.com/questions/8266950/debugging-crash-in-coregraphics-mapkit

of void mapView MKMapView mapView regionDidChangeAnimated BOOL animated Create a method that takes the region and calculates which overlays it contains NSArray newOverlays self overlaysForRegion mapView.region fromAllOverlays self.allOverlays if..

Store an encryption key in Keychain while application installation process

http://stackoverflow.com/questions/886893/store-an-encryption-key-in-keychain-while-application-installation-process

Server sends challenge byte Client sends UUID date and hash UUID challenge userPassword obfuscationKey date . Server calculates same makes sure date is in legal range 30 60s is good and validates. At this point I generally have the server generate..