02重写description方法,跟踪对象的明细信息
类似于java的toString()
- (NSString *)description { // 包含对象类型名称,以及对象的指针地址 return [NSString stringWithFormat:@"<%@: %p> {answer: %@, title: %@, icon: %@, options: %@}", [self class], self, self.answer, self.title, self.icon, self.options]; }