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2014/10/15 ¤U¤È 10:09:09

iphone Programming Glossary: floating

Correcting floating point numbers

http://stackoverflow.com/questions/10049533/correcting-floating-point-numbers

floating point numbers I am wondering if there is a way that you can easily and safely correct floating point numbers. For example.. floating point numbers I am wondering if there is a way that you can easily and safely correct floating point numbers. For example When entered 32 32.1 Result 64.0999999999999 Also I must mention that this occurs quite frequently.. double's will make this happen less often but you will still have the problem. For a technical description of how floating point numbers are stored and why we have this problem in the first place see this wikipedia article IEEE 754 1985 . Basically..

How to present a splash/login view controller using storyboards

http://stackoverflow.com/questions/11697747/how-to-present-a-splash-login-view-controller-using-storyboards

and lay it out in app storyboard. Don't drag any segue's to it and don't make it the staring vc just leave it floating somewhere. In the vc's attributes inspector in storyboard set it's identifier as AppStartupViewController . In the AppStartupViewController.m..

How to detect iPhone 5 (widescreen devices)?

http://stackoverflow.com/questions/12446990/how-to-detect-iphone-5-widescreen-devices

double 568 DBL_EPSILON The use of fabs with the epsilon is here to prevent precision errors when comparing floating points as pointed in the comments by H2CO3. So from now on you can use it in standard if else statements if IS_IPHONE_5..

How to use ldid?

http://stackoverflow.com/questions/12768109/how-to-use-ldid

that the pre built version of ldid found here can now sign fat executables although there are still ldid versions floating around that cannot. Also I think that if you install a recent version of iOSOpenDev it will give you a version of ldid that..

What's the difference between NSNumber and NSInteger?

http://stackoverflow.com/questions/1285098/whats-the-difference-between-nsnumber-and-nsinteger

simply didn't need to specify too many float values outside of time intervals. So they gave NSTimeInterval which is a floating point type but that is clearly intended for use with time intervals. And frankly it's great to have that type because you..

What does the Tiler Utilization statistic mean in the iPhone OpenGL ES instrument?

http://stackoverflow.com/questions/1287811/what-does-the-tiler-utilization-statistic-mean-in-the-iphone-opengl-es-instrumen

render in my iPhone application but I've hit a brick wall. I've tried converting my OpenGL ES data types from fixed to floating point per Apple's recommendation interleaving my vertex buffer objects and minimizing changes in drawing state but none..

J2ME VS Android VS iPhone VS Symbian VS Windows CE [closed]

http://stackoverflow.com/questions/1414288/j2me-vs-android-vs-iphone-vs-symbian-vs-windows-ce

iphone android java me windows ce symbian share improve this question There's several of these questions floating around on SO already... the most popular seems to be this one what mobile platform should I start learning Quicky from the..

NSURLConnection timeout?

http://stackoverflow.com/questions/1424608/nsurlconnection-timeout

NSURLRequestUseProtocolCachePolicy cachePolicy parameter if you don't want to worry about that part. The timeout is a floating point value in seconds as are basically all time intervals in the iPhone SDK. Also make sure your NSURLConnection 's delegate..

Strange problem comparing floats in objective-C

http://stackoverflow.com/questions/1614533/strange-problem-comparing-floats-in-objective-c

to my why this is happening Is 0.1 defined as a double by default or something Thanks. iphone objective c casting floating point share improve this question I believe having not found the standard that says so that when comparing a float to..

Double vs float on the iPhone

http://stackoverflow.com/questions/1622729/double-vs-float-on-the-iphone

issue because my program needs high precision calculations and I will have to compromise on speed. iphone cocoa touch floating point ieee 754 share improve this question The iPhone can do both single and double precision arithmetic in hardware...

Comparing float and double data types in objective C

http://stackoverflow.com/questions/5024913/comparing-float-and-double-data-types-in-objective-c

this difference a comparison such as 4.2 is false instead of true. How can I avoid this problem iphone objective c c floating point double share improve this question when a variable is assigned a number entered with one decimal place such as..

iPhone UIView Animation Best Practice

http://stackoverflow.com/questions/630265/iphone-uiview-animation-best-practice

myview layer addAnimation applicationLoadViewIn forKey kCATransitionReveal but there are also code snippets floating around the net that look like this UIView beginAnimations nil context nil UIView setAnimationDuration 0.75 UIView setAnimationDelegate..

Fixed positioning in Mobile Safari

http://stackoverflow.com/questions/743123/fixed-positioning-in-mobile-safari

noted position fixed doesn't work but Gmail just came out with a solution that almost is what I want &ndash see the floating menu bar on the message view. Getting real time scroll events in JavaScript would also be a reasonable solution. javascript..

Moving a Stick figure, anchorpoints, animation, or something else…?

http://stackoverflow.com/questions/7808981/moving-a-stick-figure-anchorpoints-animation-or-something-else

around that point. You can see the previous image position before modifying the anchor point by looking at the floating dots. In effect all you do by modifying the anchorPoint is to move offset where the node's texture is drawn relative to..

Correcting floating point numbers

http://stackoverflow.com/questions/10049533/correcting-floating-point-numbers

your looking for check out the approved answer iphone ios xcode cocoa touch cocoa share improve this question Floating point numbers do not represent specific numbers very well. Using double's will make this happen less often but you will..

Strange problem comparing floats in objective-C

http://stackoverflow.com/questions/1614533/strange-problem-comparing-floats-in-objective-c

the standard that says so that when comparing a float to a double the float is cast to a double before comparing. Floating point numbers without a modifier are considered to be double in C. However in C there is no exact representation of 0.1..

iphone / Objective C - Comparing doubles not working

http://stackoverflow.com/questions/4732645/iphone-objective-c-comparing-doubles-not-working

Comparing float and double data types in objective C

http://stackoverflow.com/questions/5024913/comparing-float-and-double-data-types-in-objective-c

float f 4.2 if f 4.2f this block of code is exectued. the comparison succeeds because the values are exactly equal. Floating point is complicated but it is entirely deterministic one of the simplest things you can do to make it more intuitive is..

Exception Types in iOS crash logs

http://stackoverflow.com/questions/7446655/exception-types-in-ios-crash-logs

SIGBUS Bus error Access to an invalid memory address. The address does not exist or the alignment is invalid. SIGFPE Floating point exception Invalid arithmetic operation. Can be related to integer operations despite the name. SIGPIPE Broken pipe...