Swift数组详细用法解析

四、二维数组

var board = [ [1024,16,2,0] , [256,4,2,0] , [64,2,0,0] , [2,0,0,0] ]
//var board:[[Int]] = [ [1024,16,2,0] , [256,4,2,0] , [64,2,0,0] , [2,0,0,0] ]
//var board:[Array<Int>] = = [ [1024,16,2,0] , [256,4,2,0] , [64,2,0,0] , [2,0,0,0] ]
//var board:Array<[Int]> = [ [1024,16,2,0] , [256,4,2,0] , [64,2,0,0] , [2,0,0,0] ]
//var board:Array<Array<Int>> = [ [1024,16,2,0] , [256,4,2,0] , [64,2,0,0] , [2,0,0,0] ]


// 二维数组获取元素
board[0]
board[0][0]


// 获取二维数组两个维度的信息
board.count
board[0].count


// Swift中的二维数组，每一维度的元素数目可以不同
board[0].append(0)
board


// 为二维数组的第一个维度添加的元素是一个数组
board.append([0,0,0,0])
board += [ [0,0,0,0] ]
board

var array1 = [] //会默认是NSArray,swift3.0之后该写法废除

var array2 = [1,2,3,4,5] as NSArray

var array3: NSArray = [1,"hello"]

var array4: [NSObject] = [1 as NSObject,"hello" as NSObject]