Question

我试图加载一个可变阵列并卡住了。

基本上我想要做的是能够将任何类对象添加到全局数组。在这个例子中，我只有名字和地址。

这是一个游乐场片段：

import Foundation
var gDownloaders:NSMutableArray?

class downloader {
    var name:String?
    var address:String?
    init(name:String, address:String) {
        self.name = name
        self.address = address
    }
}

let one = downloader(name: "Ric Lee", address: "901 Edgewood")
let two = downloader(name: "Richard Brauer", address:"1010 Red Oak")
let three = downloader(name: "Meredith Lind", address: "410 Sunset Blvd")

gDownloaders?.addObject(one)
gDownloaders?.addObject(two)
gDownloaders?.addObject(three)

println(gDownloaders)

顺便说一句：Xcode 坚持我有＆＃39;？＆＃39; / gDownloaders。

对于gDownloaders，我得到的只是零;即使这三个对象中的每一个都是真实的数据。

我做错了什么？

...我应该使用Array vs NSMutableArray类吗？

Answer 1

您永远不会初始化gDownloaders。你声明了变量gDownloaders应该具有的变量类型，但是你不能在该变量中放置任何东西。

尝试：

var gDownloaders:NSMutableArray? = NSMutableArray()

Answer 2

快速地，在操场上试试这个：

import Foundation

class downloader {
    var name:String?
    var address:String?
    init(name:String, address:String) {
        self.name = name
        self.address = address
    }
}

var gDownloaders = [downloader]()

let one = downloader(name: "Ric Lee", address: "901 Edgewood")
let two = downloader(name: "Richard Brauer", address:"1010 Red Oak")
let three = downloader(name: "Meredith Lind", address: "410 Sunset Blvd")

gDownloaders.append(one)
gDownloaders.append(two)
gDownloaders.append(three)

println(gDownloaders[0].name!)

无法将对象添加到NSMutableArray

2 个答案: