nsnumber

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NSArry of floats issue

Im trying to create an NSArray of floats. However, once the value is added to the arrays it is alway 0.0000000.[详细]

2023-01-21 20:57 分类：问答
How do I properly create static NSArrays full of NSNumbers in Objective-C (Cocoa)?

Why is it that in the following code, I can not just simply make a static array of NSNumbers? I would just use C arrays and ints, but those cannot be copied and as you can see in init(), I have to cop[详细]

2023-01-20 13:14 分类：问答
Compare a NSNumber to an int

I\'ve a simple question (I think): I\'m trying to compare a NSNumber with a int, to see if it is 0 or 1. Here is the code:[详细]

2023-01-20 03:43 分类：问答
[NSString stringWithUTF8String:(char *)sqlite3_column_text(selectstmt,0)];

i m using sqlite i am geting a return value frmo DB in this manner re开发者_StackOverflow中文版turnCount = [NSStringstringWithUTF8String:(char *)sqlite3_column_text(selectstmt,0)];[详细]

2023-01-20 00:13 分类：问答
NSPredicate, NsNumber numberWithFloat:0.0 (iPhone)

hi i have Core Data database with numerical attributes. they are NSNumbers. Default value is 0.0 but when i try to do some NSPredicated fetch, i get \"\'NSInvalidArgumentException\', reason: \'Invalid[详细]

2023-01-17 22:26 分类：问答
Getting error when added NSNumber to an array

When my program gets to the line: [userNumSequence addObject:[NSNumber numberWithInteger: sequenceNumber]];[详细]

2023-01-17 19:00 分类：问答
Generating permutations of NSArray elements

Let\'s say I have an NSArray of NSNumbers like this: 1, 2, 3 Then the 开发者_JAVA百科set of all possible permutations would look something like this:[详细]

2023-01-17 17:54 分类：问答
Converting (u)int64_t to NSNumbers

So essentially my question is this, I am creating an NSMutableDictionary using uint64_t objects as the key.[详细]

2023-01-17 05:14 分类：问答
check if NSNumber is empty

How do I check if a NSNumber object is nil or empty? OK nil is easy: NSNumber *myNumber; if (myNumber == nil)[详细]

2023-01-16 18:34 分类：问答
@"" string type literals for NSNumber

I love the shorthand handling of string literals in Objective C with the @\"string\" notation. Is there any way to get similar behavio开发者_运维问答r with NSNumbers? I deal with numbers more and it\'[详细]

2023-01-16 16:42 分类：问答