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2014/10/15 ¤U¤È 10:11:57

iphone Programming Glossary: nan

Creating NSDecimal

http://stackoverflow.com/questions/2035421/creating-nsdecimal

be found in the NSDecimal.h header typedef struct signed int _exponent 8 unsigned int _length 4 length 0 isNegative NaN unsigned int _isNegative 1 unsigned int _isCompact 1 unsigned int _reserved 18 unsigned short _mantissa NSDecimalMaxSize..

isNan in objective c

http://stackoverflow.com/questions/2109257/isnan-in-objective-c

Try just adding #include math.h and then using the standard isnan function to test. You can also use the trick that NaN is not equal to anything including itself double x do some operation here x doSomething if x x printf g is probably NaN..

What causes this error? “CALayer position contains NaN: [240 nan]”

http://stackoverflow.com/questions/3025176/what-causes-this-error-calayer-position-contains-nan-240-nan

causes this error &ldquo CALayer position contains NaN 240 nan &rdquo I've seen this happen whenever i rotate a screen that has a UITableView on it. I've found out that it happens.. Decided to take this out of comments and put it as an answer since I think it's a darned good answer Ha I had an NaN calculation div0 too. Key debugging aid the message in question is output by NSLog so set a breakpoint on NSLog and watch.. by NSLog so set a breakpoint on NSLog and watch what the OS is doing at that time. For me it was myUISlider.value NaN. To set breakpoint XCode 3.x CMD SHIFT Y debug window. Breakpoints button. Double click for symbol Type in NSLog no quotes...

UITableView crash gives 'CALayerInvalidGeometry', reason: 'CALayer position contains NaN: [160 nan]'

http://stackoverflow.com/questions/4820681/uitableview-crash-gives-calayerinvalidgeometry-reason-calayer-position-cont

crash gives 'CALayerInvalidGeometry' reason 'CALayer position contains NaN 160 nan ' I have a custom table view in my app. I have implemented the Load More feature to the table which loads 25 rows.. The problem is after loading 2 times the app crashes giving 'CALayerInvalidGeometry' reason 'CALayer position contains NaN 160 nan ' as error on OS 4.2 and above. On OS below 4.2 one of the cell goes missing and there is blank space between in..