如何在Swift中合并两个Dictionary实例? [英] How to combine two Dictionary instances in Swift?

问题描述

如何使用Swift将一个Dictionary附加到另一个Dictionary?

How do I append one Dictionary to another Dictionary using Swift?

我正在使用AlamoFire库将JSON发送到REST server.

I am using the AlamoFire library to send a JSON to a REST server.

字典1

var dict1: [String: AnyObject] = [
            kFacebook: [
                kToken: token
            ]
        ]

词典2

var dict2: [String: AnyObject] = [
        kRequest: [
            kTargetUserId: userId
        ]
    ]

如何将两个字典结合在一起，制作一个新的字典，如下所示?

let parameters: [String: AnyObject] = [
        kFacebook: [
            kToken: token
        ],
        kRequest: [
            kTargetUserId: userId
        ]
    ]

我尝试过dict1 += dict2，但是出现了编译错误:

I have tried dict1 += dict2 but got a compile error:

二进制运算符'+ ='不能应用于两个'[String:AnyObject]'操作数

Binary operator '+=' cannot be applied to two '[String : AnyObject]' operands

推荐答案

var d1 = ["a": "b"]
var d2 = ["c": "e"]

extension Dictionary {
    mutating func merge(dict: [Key: Value]){
        for (k, v) in dict {
            updateValue(v, forKey: k)
        }
    }
}

d1.merge(d2)

请参阅很棒的Dollar&分项目 https://github.com/ankurp/Cent/blob/master/Sources /Dictionary.swift

Refer to the awesome Dollar & Cent project https://github.com/ankurp/Cent/blob/master/Sources/Dictionary.swift

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