如何从雨燕2.0​​得到一个子阵 [英] How to get a subArray from Swift 2.0

问题描述

我一直在试图寻找合适的方式来获得斯威夫特子数组，但我在这里失去了一些东西。这code不起作用，因为 rowArray.append（行）抛出一个错误状态。

  

无法转换类型的值'ArraySlice＆LT;＆诠释GT;'到指定的类型
  [INT]

我无法弄清楚如何获得[INT]出主数组或ArraySlice＆LT转换，诠释＆GT;为[INT]。我猜我失去了一些东西简单，但似乎无法找到从文档的答案。

  VAR rowArray = [[INT]]（）VAR具有rangeStart = 0
让rangeLength = mapWidth对于VAR指数= 0;指数＆LT; mapHeight; ++指数{
    具有rangeStart = tileIDs.count  - （（索引+ 1）* mapWidth）    让行：[INT] = tileIDs [具有rangeStart ...具有rangeStart + rangeLength]
    rowArray.append（行）
}
rowArray.append（行）
 

解决方案

转换 ArraySlice＆LT;诠释＆GT; 到 [INT] 与阵列（）：

 让行：[INT] =阵列（tileIDs [具有rangeStart ...具有rangeStart + rangeLength]）
 

I keep trying to search for the proper way to get a sub array in Swift but I am missing something here. This code doesn't work because rowArray.append(row) throws an error that states.

Cannot convert value of type 'ArraySlice<Int>' to specified type '[Int]'

I can't figure out how to get an [Int] out of the main array or to convert ArraySlice<Int> to [Int]. I am guessing I am missing something simple but can't seem to find the answer from the docs.

var rowArray = [[Int]]()

var rangeStart = 0
let rangeLength = mapWidth

for var index = 0; index < mapHeight; ++index{
    rangeStart = tileIDs.count - ((index + 1) * mapWidth )

    let row : [Int] = tileIDs[rangeStart...rangeStart+rangeLength]
    rowArray.append(row)
}
rowArray.append(row)

解决方案

Convert ArraySlice<Int> to [Int] with Array():

let row : [Int] = Array(tileIDs[rangeStart...rangeStart+rangeLength])

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