2014/10/15 下午 10:05:24

iphone Programming Glossary: computations

why is textFieldDidEndEditing: not being called?

http://stackoverflow.com/questions/1228298/why-is-textfielddidendediting-not-being-called

UITextField and when text gets entered into that I want to obtain the doubleValue from the text field and perform some computations and display them in a UITableView. The delegate for the UITextField adopts the UITextFieldDelegate protocol and implements..

Saving and restoring CGContext

http://stackoverflow.com/questions/1446446/saving-and-restoring-cgcontext

and restoring CGContext I'm trying to save and restore a CGContext to avoid doing heavy drawing computations for a second time and I'm getting the error Error CGGStackRestore gstack underflow . What am I doing wrong What is the correct..

What is the right choice between NSDecimal, NSDecimalNumber, CFNumber?

http://stackoverflow.com/questions/1704504/what-is-the-right-choice-between-nsdecimal-nsdecimalnumber-cfnumber

it begins to be a kind of jungle to me. Basically I'm trying to create a simple model class that will handle simple computations like this one #import Foundation Foundation.h @interface Test NSObject float rate float amount int duration float capitalizedAmount.. to know Are the memory overhead and performance loss acceptable for a somewhat more complicated class only financial computations of this kind showed in an UITableView I do not have much background in C... Isn't it too fastidious and complicated to use.. was easy to define __add__ to use operators with objects. Should I get float values from NSDecimalNumber then do the computations and returns the result wrapped in an NSDecimalNumber How would you deal with this problem I am looking for a simple and..

How do I display and calculate numbers from a database on iPhone?

http://stackoverflow.com/questions/2224285/how-do-i-display-and-calculate-numbers-from-a-database-on-iphone

the Model View Controller pattern. In this case your model will be an object that stores the numbers and also does the computations with those numbers. Your view here will be the views in each tab the first tab visualizing the computations the second tab.. does the computations with those numbers. Your view here will be the views in each tab the first tab visualizing the computations the second tab visualizing the numbers. The controller here will be your existing UIViewController objects or subclasses..