2.数组和字典的相互嵌套

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本文详细探讨了四种不同的数组和字典嵌套使用方式：1) 字典中嵌套数组；2) 数组中嵌套字典；3) 字典内嵌套数组，数组中再嵌套字典；4) 数组内嵌套数组，数组内再包含字典。通过这些实例，读者可以全面了解如何在实际编程中灵活运用这两种数据结构。

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1.字典里嵌套数组

NSArray *arr1 = @[@"1",@"2"];
NSArray *arr2 = @[@"3",@"4"];
NSMutableDictionary *dic = [NSMutableDictionary dictionaryWithObjectsAndKeys:arr1,@"one",arr2,@"two", nil];
//遍历所有信息
for (NSString *str in dic) {
    NSArray *arr = dic[str];//用一个数组来接收通过key找到value数组
    for (NSString *temp in arr) {
        NSLog(@"%@",temp);
    }
}

2.数组里面嵌套字典

NSDictionary *dic1 = [NSDictionary dictionaryWithObjectsAndKeys:@"zhangsan",@"name",@"23",@"age", nil];
NSDictionary *dic2 = [NSDictionary dictionaryWithObjectsAndKeys:@"lisi",@"name",@"21",@"age", nil];
NSDictionary *dic3 = [NSDictionary dictionaryWithObjectsAndKeys:@"wangwu",@"name",@"22",@"age", nil];
NSArray *arr = @[dic1,dic2,dic3];
//遍历所有信息
for (NSDictionary *dic in arr) {
    for (NSString *str in dic) {
        NSLog(@"%@",dic[str]);
    }
}

3.字典里嵌套数组,数组里面又嵌套字

NSDictionary *dic1 = [NSDictionary dictionaryWithObjectsAndKeys:@"zhangsan",@"name",@"23",@"age", nil];
NSDictionary *dic2 = [NSDictionary dictionaryWithObjectsAndKeys:@"lisi",@"name",@"21",@"age", nil];
NSDictionary *dic3 = [NSDictionary dictionaryWithObjectsAndKeys:@"wangwu",@"name",@"22",@"age", nil];
NSArray *arr1 = @[dic1,dic2];
NSArray *arr2 = @[dic3];
NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:arr1,@"arr1",arr2,@"arr2", nil];
//遍历所有信息
for (NSString *key1 in dic) {
    NSArray *array = dic[key1];
    for (NSDictionary *temp in array) {
        for (NSString *key in temp) {
            NSLog(@"%@",temp[key]);
        }
    }
}

4.数组里面嵌套数组,数组里面又嵌套字典

 NSDictionary *dic1 = [NSDictionary dictionaryWithObjectsAndKeys:@"zhangsan",@"name",@"23",@"age", nil];
NSDictionary *dic2 = [NSDictionary dictionaryWithObjectsAndKeys:@"lisi",@"name",@"21",@"age", nil];
NSDictionary *dic3 = [NSDictionary dictionaryWithObjectsAndKeys:@"wangwu",@"name",@"22",@"age", nil];
NSArray *arr1 = @[dic1,dic2];
NSArray *arr2 = @[dic3];
NSArray *bigArr = @[arr1,arr2];
//遍历所有信息
for (NSArray *array in bigArr) {
    for (NSDictionary *dic in array) {
        for (NSString *key in dic) {
            NSLog(@"%@",dic[key]);
        }
    }
}