ios - 二维数组 Objective-C

Question

我正在从两个可变数组创建一个数组。 数组 1 有 3 个对象，数组 2 也有 3 个对象 我收到一条崩溃消息，提示“无法识别的选择器已发送到实例”，为什么这不起作用？

初始化两个数组:

self.array1 =[[NSMutableArray alloc]initWithObjects:@"word", @"word2", nil];
self.array2 =[[NSMutableArray alloc]initWithObjects:@"this goes with word1", @"this goes with the second word", nil];

NSMutableArray *objects;
for (int i=0 ; i<[array1 count]; i++){
   for (int j=0 ; j<[array2 count]; j++){
       objects = [[NSMutableArray alloc]init];
       objects=[array1 objectAtIndex:i][[array2 objectAtIndex:j]];
   }
}

Answer 1

如果我对你的理解正确，你需要使用字典来提供你想要的那种查找机制:

self.array1 = @[@"word", @"word2"].mutableCopy;
self.array2 = @[@"this goes with word1", @"this goes with the second word"].mutableCopy;

NSDictionary *dictionary = [NSDictionary dictionaryWithObjects:self.array2
                                                       forKeys:self.array1];

NSLog(@"%@", dictionary[@"word"]);
// Prints "this goes with word1".