nsnumber

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NSNumbers are inaccurate when retrieved using core data

This is a little odd to me, but when I perform basic division on a float I get inaccurate approximations. This isn\'t a huge开发者_如何学JAVA deal because I can truncate the number, but I\'m just curi[详细]

2023-03-31 16:51 分类：问答
How to combine the advantages of `int` and `NSInteger`

A seemingl开发者_如何学运维y simple question: Can I have some sort of Number object, which can be nil but which I can assign like a primitive int:[详细]

2023-03-31 12:05 分类：问答
NSNumber numberWithInt crashing on numbers >= 13

I\'m pretty new to Objective-C. I\'ve read through a similar question but I can\'t figure out how to solve my problem with that information.[详细]

2023-03-30 18:50 分类：问答
NSNumber: stringValue crashes, description works

[measureValue stringVal开发者_运维知识库ue] gives me this exception: Terminating app due to uncaught exception \'NSInvalidArgumentException\', reason: \'-[NSCFString stringValue]: unrecognized selec[详细]

2023-03-30 09:46 分类：问答
Detect if NSNumber is equal to NULL

How do I detect if a NSNumber is NULL? For example, I use a开发者_运维百科 NSLog to display the value of a NSNumber and if there is an incorrect value, such as letters, it shows \"null\" in the log. T[详细]

2023-03-29 11:43 分类：问答
NSPredicate and NSString Question

I have the following predicate that works fine with numbers such as 555 and 623 (3 digit numbers) The problem is, I have numbers such as 005 and 009 etc (1 digit with two 0 before).[详细]

2023-03-28 12:11 分类：问答
how to round off NSNumber and create a series of number in Object C

May i know how to round up a NSNumber in object C ? for(int i=6; i>=0; i--) { DayOfDrinks *drinksOnDay = [appDelegate.drinksOnDayArray objectAtIndex:i];[详细]

2023-03-28 09:08 分类：问答
Check if NSArray contains some int

I have a NSMutableArray of NSNumbers. Basically I just want to check if开发者_运维技巧 any of the NSNumbers in the array = some value.[详细]

2023-03-26 16:07 分类：问答
Retrieve integers by looping through a NSMutableArray

Can someone show me how to retrieve values by looping through a NSMutableArray? My code, which basically adds integer numbers to the array, is below :[详细]

2023-03-24 05:18 分类：问答
NSNumbers taking up less memory than ints?

I\'m still very much a noob, having a lot of fun learning the basics of Objective-C, using XCode to put together some simple programs for OS-X.[详细]

2023-03-23 18:05 分类：问答