Question

所以我有班级凯蒂：

ref 5

我有一组这些自定义对象# let a = Array.make 3 (Array.make 3 (ref 5));; val a : int ref array array = [|[|{contents = 5}; {contents = 5}; {contents = 5}|]; [|{contents = 5}; {contents = 5}; {contents = 5}|]; [|{contents = 5}; {contents = 5}; {contents = 5}|]|] # a.(1).(2) := 99;; - : unit = () # a;; - : int ref array array = [|[|{contents = 99}; {contents = 99}; {contents = 99}|]; [|{contents = 99}; {contents = 99}; {contents = 99}|]; [|{contents = 99}; {contents = 99}; {contents = 99}|]|]。

我需要使用字符串class Caddy{ var caddyName: String var phoneNumber: Int var email: String var password: String var caddyRank: String var caddyLocation: Int var proPic: UIImage }引用数组中的特定对象。

然后我需要更改该特定对象的值，特别是caddyList值。

如何使用Swift 2.0完成此操作？

Answer 1

如果订单对您不重要，您应该使用Dictionary Caddys代替一系列Caddys。这将允许O（1）访问集合中的任何类别。使用swift也可以轻松访问和修改对象。

// Assume you have two Caddy objects, caddy1 and caddy2
// Create the dictionary
caddies = [caddy1.caddyName: caddy1, caddy2.caddyName: caddy2]  // eg, etc...

// Access and change the caddies location (if the name has a match)
caddies["Bob"]?.caddyLocation = 2

如果您想知道球童实际存在的时间并进行了修改，请将其包裹在if let中。

let bobCaddyName = "Bob"
if let _ = caddies[bobCaddyName] {
  caddies[bobCaddyName]?.caddyLocation = 2
}

引用自定义对象数组中的特定对象，并更改值

1 个答案: