//可变字典 NSMutableDictionary
1 创建空的字典对象 初始化方法
NSMutableDictionary * mulDict = [NSMutableDictionary dictionary];
2 开辟固定容量大小的可变字典对象
NSMutableDictionary * dict = [NSMutableDictionary dictionaryWithCapacity:20];
3 用传入字典对象构造字典对象
NSMutableDictionary *dict1 = [NSMutableDictionary dictionaryWithDictionary:@{@"one":@"1"}];
NSLog(@"dict1 = %@",dict1);
4 修改key对应的值 或者 添加键值对
[dict1 setObject:@"2" forKey:@"two"];
NSLog(@"dict1 = %@",dict1);
5 删除某个key值对应的键值对
[dict1 removeObjectForKey:@"two"];
NSLog(@"dict1 = %@",dict1);
6 删除key数组对应的键值对
[dict1 removeObjectsForKeys:NSArray];
7 添加传入字典的键值对 到字典中
[dict1 addEntriesFromDictionary:@{@"one":@"2"}];
NSLog(@"dict1 = %@",dict1);
8 删除所有键值对
[dict1 removeAllObjects];
9 重置或者修改字典
[dict1 setDictionary:@{@"one":@"1"}];
/**
{ 字符串1 ：数组1 [{字典1},{},{}]
字符串2 ：数组2
字符串3 ：数组3
}
*/