想给nsdictionary的key添加一个数组,其中每个key都是一个question,每个question对应多个answer:
Question1 = [Answer1], [Answer2] , [Answer3];
Question2 = [Answer1], [Answer2] , [Answer3];
然后我尝试用下面的代码时报错:
No Visible @interface for NSDictionary declares the selector 'setObject::forKey'
代码:
//answers
_surveyAnswers1 = [[NSMutableDictionary alloc] init];
NSArray *myArrayAnswers1 = [NSArray arrayWithObjects:@"One",@"Two", nil];
NSArray *myArrayAnswers2 = [NSArray arrayWithObjects:@"Three",@"Four", nil];
[_surveyAnswers1 setObject:myArrayAnswers1 forKey:@"FirstKey"];
[_surveyAnswers1 setObject:myArrayAnswers2 forKey:@"SecondKey"];
不知道怎么正确添加?