2014/10/15 下午 10:09:18

iphone Programming Glossary: formula

http://stackoverflow.com/questions/14155360/convert-to-float-and-calculate

something like that in iPhone . iphone objective c ios share improve this question What about this NSString formula @ 1 5 6 NSExpression exp NSExpression expressionWithFormat formula NSNumber resultForCustomFormula exp expressionValueWithObject.. improve this question What about this NSString formula @ 1 5 6 NSExpression exp NSExpression expressionWithFormat formula NSNumber resultForCustomFormula exp expressionValueWithObject nil context nil NSLog @ f resultForCustomFormula floatValue.. Mr. Borrrden suggested me to use it and I found it awesome. See below method NSMutableString formatString NSString formula Let's check if there any wrong . value exm 1 .2 or .7 3 1 0.2 and 0.7 3 are okay but above are incorrect so first fix them..

Check if UIColor is dark or bright?

http://stackoverflow.com/questions/2509443/check-if-uicolor-is-dark-or-bright

Drawing formulas with Quartz 2d

http://stackoverflow.com/questions/2907045/drawing-formulas-with-quartz-2d

formulas with Quartz 2d In my iPhone App I'd like to draw a few formulas. How can I manage that with quartz 2d Is there a way to.. formulas with Quartz 2d In my iPhone App I'd like to draw a few formulas. How can I manage that with quartz 2d Is there a way to build formulas like for example in latex Or are there any existing.. 2d In my iPhone App I'd like to draw a few formulas. How can I manage that with quartz 2d Is there a way to build formulas like for example in latex Or are there any existing frameworks Thanks. iphone cocoa touch latex formula quartz 2d share..

iphone accelerometer speed and distance

http://stackoverflow.com/questions/3177199/iphone-accelerometer-speed-and-distance

and velocity from accelerometer events. Like iphone's gMeter application is doing. Any suggestion by which value or formula I should use for that Thanks in advance. iphone accelerometer distance share improve this question You can use the..

CLLocation Category for Calculating Bearing w/ Haversine function

http://stackoverflow.com/questions/3925942/cllocation-category-for-calculating-bearing-w-haversine-function

a category for CLLocation to return the bearing to another CLLocation. I believe I'm doing something wrong with the formula calculous is not my strong suit . The returned bearing is always off. I've been looking at this question and tried applying..

Getting displacement from accelerometer data with Core Motion

http://stackoverflow.com/questions/4449565/getting-displacement-from-accelerometer-data-with-core-motion

I would strongly recommend to not rely on trapezoidal rule but to use at least Simpson or a higher degree Newton Cotes formula. If you managed this you will have to keep an eye on setting up the right low pass filtering. I cannot give a general value..

Using UIPinchGestureRecognizer to scale uiviews in single direction

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

CGPointDistance CGPoint point1 CGPoint point2 return CGPointMake point2.x point1.x point2.y point1.y EDIT2 about the formula to calculate the scaling The idea is calculating the variation in the scale factor and apply it to the two directions x..

GPS coordinates in degrees to calculate distances

http://stackoverflow.com/questions/6994101/gps-coordinates-in-degrees-to-calculate-distances

with the values in degrees. I would like to have the result in meters. What's the conversion needed How will the final formula to compute this look like iphone ios4 map gps share improve this question Why don't you use CLLocation s distanceFromLocation..

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

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

this image menu button or label without modifying the anchorPoint you would have to set its position according to this formula screen width contentSize.width anchorPoint.x screen height 2 The formula is still pretty simple it becomes a chore however.. have to set its position according to this formula screen width contentSize.width anchorPoint.x screen height 2 The formula is still pretty simple it becomes a chore however if the contentSize of the node changes which is often the case for labels..