Retired Document
Important: This sample code may not represent best practices for current development. The project may use deprecated symbols and illustrate technologies and techniques that are no longer recommended.
Treasure.m
/* |
File: Treasure.m |
Abstract: Treasure class |
for this example application. Treasure is a subclass |
of the Trinket class and it has some additional |
properties. |
Trinkets and treasures provide us with objects to |
put inside of the Bucket and StrongBox container |
objects. |
Version: 1.2 |
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provided that if you redistribute the Apple Software in its entirety and |
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Neither the name, trademarks, service marks or logos of Apple Inc. may |
be used to endorse or promote products derived from the Apple Software |
without specific prior written permission from Apple. Except as |
expressly stated in this notice, no other rights or licenses, express or |
implied, are granted by Apple herein, including but not limited to any |
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Copyright (C) 2011 Apple Inc. All Rights Reserved. |
*/ |
#import "Treasure.h" |
#import "scriptLog.h" |
@implementation Treasure |
/* Instead of sythesizing our properties here, we implement them manually |
in order to perform logging for debugging purposes. */ |
/* after initializing our superclasses, we set the properties we're |
maintaining in this class to their default values. |
See the description of the NSCreateCommand for more information about |
when your init method will be called. */ |
- (id)init { |
if ((self = [super init])) { |
itemValue = [[NSNumber alloc] initWithFloat:0.0]; |
itemMetal = [[NSNumber alloc] initWithUnsignedLong:kTinMetal]; |
} |
/* I put the logging statement later after the superclass was initialized |
so we will be able to report the uniqueID */ |
SLOG(@"init treasure %@", self.uniqueID); |
return self; |
} |
/* standard deallocation of our members followed by superclass. |
nothing out of the ordinary here. */ |
- (void) dealloc { |
SLOG(@"del treasure %@", self.uniqueID); |
self.value = nil; |
self.metal = nil; |
[super dealloc]; |
} |
/* We have implemented our 'metal' property as an |
AppleScript enumeration. As such, each of the items in the |
enumeration is identified by a unique four character code |
stored in a long integer. |
decodeMetal converts the four character OSType stored |
in an unsigned long into a human readable string we can |
display in our logging. */ |
+ (NSString*) decodeMetal:(NSNumber*) metal { |
NSString *metalName; |
switch ([metal unsignedLongValue]) { |
case kTinMetal: metalName = @"Tin"; break; |
case kPewterMetal: metalName = @"Pewter"; break; |
case kBronzeMetal: metalName = @"Bronze"; break; |
case kSilverMetal: metalName = @"Silver"; break; |
case kGoldMetal: metalName = @"Gold"; break; |
default: metalName = @"Unknown"; break; |
} |
return [NSString stringWithString:metalName]; |
} |
/* standard setter and getter methods for the 'value' property |
nothing out of the ordinary here. */ |
- (NSNumber *)value { |
SLOG(@"treasure %@ value = %@", self.uniqueID, itemValue); |
return [[itemValue retain] autorelease]; |
} |
- (void)setValue:(NSNumber *)value { |
SLOG(@"set treasure %@ value to %@", self.uniqueID, value); |
if (itemValue != value) { |
[itemValue release]; |
itemValue = [value copy]; |
} |
} |
/* standard setter and getter methods for the 'metal' property. |
Nothing out of the ordinary here, but, this time, the fact that |
there is nothing out of the ordinary is interesting in itself. |
Note that since the metal property is an enumeration and it's value |
is stored as a long integer inside of a NSNumber, we don't have to |
do anything special for managing that storage here - we treat it the |
same as any other numeric property. */ |
- (NSNumber *)metal { |
SLOG(@"treasure %@ metal = %@", self.uniqueID, [Treasure decodeMetal:itemMetal]); |
return [[itemMetal retain] autorelease]; |
} |
- (void)setMetal:(NSNumber *)value { |
SLOG(@"set treasure %@ metal to %@", self.uniqueID, [Treasure decodeMetal:value]); |
if (itemMetal != value) { |
[itemMetal release]; |
itemMetal = [value copy]; |
} |
} |
@end |
Copyright © 2011 Apple Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2011-09-07