Is there a way to set a value to readonly attribute in Objective-C? I actually don't care how nasty the code is unless it isn't stable anymore.
Never mind my comment, here's the two ways you do it:
@interface Grimley : NSObject
@property (readonly, copy) NSString * blabber;
@property (readonly, copy) NSString * narwhal;
- (id) initWithBlabber:(NSString *)newBlabber;
@end
@implementation Grimley
@synthesize blabber;
@synthesize narwhal = unicorn;
- (id) initWithBlabber:(NSString *)newBlabber {
self = [super init];
if( !self ) return nil;
// Any object can of course set its own ivar regardless
// of how the property it backs is declared.
blabber = [newBlabber copy];
// Refer to the _ivar_, not the property.
unicorn = @"One horn";
return self;
}
@end
int main (int argc, const char * argv[])
{
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
Grimley * g = [[Grimley alloc] initWithBlabber:@"Excelsior"];
// This is how you get around the property.
[g setValue:@"Nimitz" forKey:@"blabber"];
// Again, use the name of the variable, not the property
[g setValue:@"Pearly horn" forKey:@"unicorn"];
NSLog(@"%@", [g blabber]);
NSLog(@"%@", [g narwhal]);
[g release];
[pool drain];
return 0;
}
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