54 lines
1.1 KiB
Mathematica
54 lines
1.1 KiB
Mathematica
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@interface Camera : NSObject {
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}
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@end
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@implementation Camera
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@end
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@interface MobilePhone : NSObject {
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}
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@end
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@implementation MobilePhone
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@end
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@interface CameraPhone : NSObject {
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Camera *camera;
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MobilePhone *phone;
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}
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@end
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@implementation CameraPhone
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-(instancetype)init {
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if ((self = [super init])) {
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camera = [[Camera alloc] init];
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phone = [[MobilePhone alloc] init];
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}
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return self;
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}
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-(void)forwardInvocation:(NSInvocation *)anInvocation {
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SEL aSelector = [anInvocation selector];
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if ([camera respondsToSelector:aSelector])
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[anInvocation invokeWithTarget:camera];
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else if ([phone respondsToSelector:aSelector])
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[anInvocation invokeWithTarget:phone];
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else
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[self doesNotRecognizeSelector:aSelector];
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}
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-(NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector {
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return [camera methodSignatureForSelector:aSelector]
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?: [phone methodSignatureForSelector:aSelector]
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?: [super methodSignatureForSelector:aSelector];
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}
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-(BOOL)respondsToSelector:(SEL)aSelector {
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return [camera respondsToSelector:aSelector]
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|| [phone respondsToSelector:aSelector]
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|| [super respondsToSelector:aSelector];
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}
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@end
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