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@Catfish-Man

Catfish-Man/rootclasskvo.m

Created June 10, 2016 00:12
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rootclasskvo.m
#import <Foundation/Foundation.h>
#import <objc/runtime.h>
NS_ROOT_CLASS
@interface KVOTest
@end
@implementation KVOTest
@end
int main() {
id test = class_createInstance(objc_getClass("KVOTest"), 0);
[test addObserver:test forKeyPath:@"self" options:0 context:NULL];
return 0;
}
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2016-06-09 17:11:57.475 rootclasstest[1646:86595] *** NSForwarding: warning: object 0x7fe20b4054c0 of class 'KVOTest' does not implement methodSignatureForSelector: -- did you forget to declare the superclass of 'KVOTest'?
2016-06-09 17:11:57.475 rootclasstest[1646:86595] *** NSForwarding: warning: object 0x7fe20b4054c0 of class 'KVOTest' does not implement doesNotRecognizeSelector: -- abort
fish: './rootclasstest' terminated by signal SIGTRAP (Trace or breakpoint trap)

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