###数组
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声明
var shoppingList: String[] = ["Eggs", "Milk"]但由于 Swift 的类型推导，你这么写也是可以的。
var shoppingList = ["Eggs", "Milk"] -
方法
确定数组内元素的个数
shoppingList.count在数组最后添加一个元素
shoppingList.append("Flour")也可以
shoppingList += "Baking Powder"替换元素，Swift 允许替换范围大于替换后的元素个数
shoppingList[4...6] = ["Bananas", "Apples"]在具体某个位置添加元素
shoppingList.insert("Maple Syrup", atIndex: 0)移除具体某个位置的元素
let mapleSyrup = shoppingList.removeAtIndex(0)获取数组下标和对应的值
for (index, value) in enumerate(shoppingList){...}
###字典
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声明
var airports: Dictionary<string, string> = ["TYO":"Tokyo", "DUB":"Dublin"] var namesOfIntegers = Dictionary<Int, String>() -
方法
统计字典元素个数
airports.count更新字典值，如果不存在该 key ，则会返回 nil
let oldValue = airports.updateValue("Dublin International", forKey: "DUB")删除字典值
let removedValue = airports.removeValueForKey("DUB")获取字典 key
let airportCodes = Array(airports.keys) for airportCode in airports.keys{...}获取字典 value
let airportName = Array(airports.values) for airportName in airports.values{...}