Swift 数组

// 数组的用法

let empetyArray = []  // 空数组

let stringArray = [String]()  // 字符串数组,限定其值为字符串

let intArray = [Int]()       // 整型数组，限定其值为整型

var shoppingList = ["苹果","香蕉","西瓜","木瓜","黄瓜","冬瓜"] // 声明一个四个字符串的数组

print(shoppingList.capacity)

// 增加

shoppingList.append("芒果")     // 方法一

shoppingList += ["荔枝"];       // 方法二

shoppingList.insert("橘子", atIndex: 0) // 方法三

print(shoppingList)

// 常用用法

print(shoppingList.count)    // 数组中元素的个数

print(shoppingList.capacity) // 数组的容量最大为12

print(shoppingList.isEmpty)  // 判断数组是否为空

// 修改

shoppingList[1] = "哈密瓜"

print(shoppingList)

shoppingList[2...5] = ["Apples","Banans"]  // 把下标为2、3、4、5的值改为 "Apples","Banans"

print(shoppingList)

// 删除

shoppingList.removeLast()

print(shoppingList)

shoppingList.removeAtIndex(3)

print(shoppingList)

//shoppingList.removeAll()

//print(shoppingList)

// 数组的遍历

for item in shoppingList

{

print(item)

}