問題與創建結構類型的數組的元素

Question

我創建了一個名爲Location一個結構類型

struct Location { 
    var XCoor: Int 
    var YCoor: Int 
} 

我想創建Location類型的數組我把它命名爲places

var places : Array<Location> 

Quesiont：如何爲數組創建元素？

我錯誤的猜測中的兩個

places[0](Xcoor: 10, YCoor: 12)// error: cannot call value of non-function type 'Location' 


places[0].XCoor = 10 
places[0].YCoor = 12 //error: constant 'places' passed by reference before being initialized 

Answer 1

所有你可能需要使用常量（而不是變量）和小寫名稱中的第一個Location。

struct Location { 
    let x: Int 
    let y: Int 
} 

接下來你這是怎麼創造的Locations（S）

var places = [Location]() 

一個可變的數組，你這是怎麼添加位置的地方

places.append(Location(x: 1, y: 3)) 

Answer 2

let firstLocation = Location(XCoor: 10, Ycoor: 10) 

places.append(firstLocation) 

Answer 3

的語法如下：

struct Location { 
    var XCoor: Int 
    var YCoor: Int 
} 

var places : [Location] // a bit of syntactic sugar, dropping the Array<...> 
places = [] // actually create the empty array 

var places2 = [Location]() // alternate, shorter, more swifty version of the two lines before 

places.append(Location(XCoor: 10, YCoor: 12)) // create an instance of the struct append it to the array