在 nsmutablearray 中添加数组答案

【问题标题】：Add Array in nsmutableaary在 nsmutablearray 中添加数组
【发布时间】：2014-08-30 10:49:59
【问题描述】：

当用户点击喜欢按钮时，我正在开发 instragramm 类型的应用程序，我想在喜欢的地方添加用户名所以我在带有数组的字典中有一个字典。我正在尝试添加到 likes 数组中的数组。

    {
    caption = "Shakira Shakira...";
    comments =         (
    );
    "display_name" = Shakira;
    ext = "<null>";
    "image_id" = 53;
    likes =         (
    );
    "post_type" = i;
    "total_comments" = 0;
    "total_likes" = 0;
    "upload_dt" = 3wk;
    "user_id" = 7;
    "user_liked" = 0;
},
    {
    caption = "Addicted to Shakira???";
    comments =         (
                    {
            comment = "love your profile :)";
            "display_name" = Rihanna;
            "user_id" = 5;
        },
                    {
            comment = "You are my favorite celebrity on Follow Me.";
            "display_name" = Pitbull;
            "user_id" = 4;
        },
                    {
            comment = "Looking Good!";
            "display_name" = "Justin Bieber";
            "user_id" = 2;
        }
    );
    "display_name" = Shakira;
    ext = "<null>";
    "image_id" = 52;
    likes =         (
                    {
            "display_name" = "Justin Bieber";
            "user_id" = 2;
        },
                    {
            "display_name" = Rihanna;
            "user_id" = 5;
        },
                    {
            "display_name" = Pitbull;
            "user_id" = 4;
        }
    );
    "post_type" = i;
    "total_comments" = 3;
    "total_likes" = 3;
    "upload_dt" = 2mth;
    "user_id" = 7;
    "user_liked" = 0;
},

我想添加 display_name 和 user_id

【问题讨论】：

标签： ios nsarray

【解决方案1】：

NSMutableArray *mutearr = [NSMutableArray arrayWithArray:array];

这里的数组是 NSArray，mutarr 是 NSMutablearray

【讨论】：

【解决方案2】：

您可以使用 addObjectsFromArray: from NSMutableArray 类

NSArray *animal = [[NSArray alloc]initWithObjects:@"Lion",@"Tiger",@"Dog",@"Cat",@"Sheep",@"Wolf", nil];
NSArray *color = [[NSArray alloc]initWithObjects:@"Blue",@"Red",@"Yellow",@"Green",@"Black", nil];

NSMutableArray *all = [[NSMutableArray alloc] init];
[all addObjectsFromArray:animal];
[all addObjectsFromArray:color];

【讨论】：

【解决方案3】：

 var displayNames = [String]()

 var userIds = [Int]()

 let responseArray = (yourArray as? [NSDictionary]) ?? []

 for ar in responseArray{

     let display_name = ar.value(forKey: "display_name") as? String
     displayNames.append(display_name ?? "")

     let user_id = ar.value(forKey: "user_id") as? Int
     userIds.append(user_id ?? 0)
 }

 print(displayNames,userIds)

【讨论】：

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