Swift集合数据类型-Arrary

Arrays

var array = ["A","B","C","D"]

• 一个数组只能存储特定类型的数据
• 所存数据不一定是类的对象，也可以是基本数据类型

Array Type

• [String]
• Array<String>

声明数组的方法:

//声明数组的三种方式
var array1 = ["a","b","c","d","e"]
var array2:[String] = ["a","b","c","d","e"]
var array3:Array<String> = ["a","b","c","d","e"]

声明空的数组：

//数组的初始化
var array4 = [Int]()
var str4 = [String]()
var array5 = Array<String>()

数组的操作：

//拼接数组
array4 = Array<Int>(count: 10, repeatedValue: 0)//[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
var array6 = [1,2,3]
var array7 = array4 + array6//[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3]
//遍历数组
for index in 0..<array.count
{
    println(array[index])
}
for item in array{
    println(item)
}