Need Help With Creating NSMutableNumber Class
Need Help With Creating NSMutableNumber Class
- Subject: Need Help With Creating NSMutableNumber Class
- From: Chase <email@hidden>
- Date: Sun, 10 Jul 2005 23:14:38 -0500
I'm trying to build a class to function as the NSMutableNumber class
would if it existed.
NSNumber is a cluster class, so subclassing it directly wasn't
working. I decided to make my own little aggregate class
("XXXMutableNumber") that contains an instance variable ("_number")
which holds the actual NSNumber. I understand that there are a few
different ways that I could have tackled this, but, please just help
me with this particular method that I've already chosen.
The setters and getters and alloc/init pairs are all working great,
but I'm not exactly sure how I should write the class method
counterparts to the "-initWithBlaBlaBla:" methods
("+numberWithBlaBlaBla:" for example).
Please (1) help me with the "+numberWithBlaBlaBla:" methods, and (2)
look at what I've got below and tell me if I'm getting any of the
memory management stuff wrong:
#import <Foundation/Foundation.h>
@interface XXXMutableNumber : NSObject {
NSNumber * _number;
}
- (void)setBoolValue:(BOOL)value;
// setCharValue, setDoubleValue, etc...
@end
@implementation XXXMutableNumber
- (id)initWithBool:(BOOL)value {
self = [super init];
if (self) {
_number = [[NSNumber alloc] initWithBool:value];
}
return self;
}
// initWithChar, initWithDouble, etc...
* (XXXMutableNumber)numberWithBool:(BOOL)value { // THIS
IS THE MAIN THING I NEED HELP WITH
// ??????????
}
// numberWithChar, numberWithDouble, etc...
- (void)setBoolValue:(BOOL)value {
[_number release];
_number = [[NSNumber alloc] initWithBool:value];
}
// setCharValue, setDoubleValue, etc...
- (BOOL)boolValue {
return [_number boolValue];
}
// charValue, doubleValue, etc...
@end
NOTE: If you're reading this in the archives a hundred years from
now, please read through the entire thread to make sure any bugs are
corrected before you copy/paste into your own project.
Thanks.
- Chase
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