重新排列UIImage陣列中的元素

Question

我有一個NSURL數組數組，我可以使用函數removeAtIndex和insert。我知道fromIndexPath和toIndexPath，並且此方法可以幫助我來完成使用該委託方法[[NSURL]]相同（檢查var data下圖）：

func moveDataItem(fromIndexPath : NSIndexPath, toIndexPath: NSIndexPath) { 
     let name = self.data[fromIndexPath.section][fromIndexPath.item] 
     self.data[fromIndexPath.section].removeAtIndex(fromIndexPath.item) 
     self.data[toIndexPath.section].insert(name, atIndex: toIndexPath.item) 

    // do same for UIImage array 
} 

然而，我的UIImage與3個空元素的數組與跑步。

var newImages = [UIImage?]() 

viewDidLoad() { 
    newImages.append(nil) 
    newImages.append(nil) 
    newImages.append(nil) 
} 

我的問題是我怎麼可以使用newImages陣列內moveDataItem()，還有data並能夠運行爲重新安排爲UIImage的排列順序線。

我想這些只可惜我不能讓他們工作..

self.newImages[fromIndexPath.section].removeAtIndex(fromIndexPath.item) 
// and 
self.newImages[fromIndexPath.row].removeAtIndex(fromIndexPath.item) 

---

爲了澄清，數據陣列看起來像這樣

lazy var data : [[NSURL]] = { 

    var array = [[NSURL]]() 
    let images = self.imageURLsArray 

    if array.count == 0 { 

     var index = 0 
     var section = 0 


     for image in images { 
      if array.count <= section { 
       array.append([NSURL]()) 
      } 
      array[section].append(image) 

      index += 1 
     } 
    } 
    return array 
}() 

Answer 1

這應該重新安排任何工作2d陣列：

func move<T>(fromIndexPath : NSIndexPath, toIndexPath: NSIndexPath, items:[[T]]) -> [[T]] { 

    var newData = items 

    if newData.count > 1 { 
     let thing = newData[fromIndexPath.section][fromIndexPath.item] 
     newData[fromIndexPath.section].removeAtIndex(fromIndexPath.item) 
     newData[toIndexPath.section].insert(thing, atIndex: toIndexPath.item) 
    } 
    return newData 
} 

用法示例：

var things = [["hi", "there"], ["guys", "gals"]] 

// "[["hi", "there"], ["guys", "gals"]]\n" 
print(things) 

things = move(NSIndexPath(forRow: 0, inSection: 0), toIndexPath: NSIndexPath(forRow:1, inSection: 0), items: things) 

// "[["there", "hi"], ["guys", "gals"]]\n" 
print(things) 

，這將與正常工作數組：

func move<T>(fromIndex : Int, toIndex: Int, items:[T]) -> [T] { 

    var newData = items 

    if newData.count > 1 { 
     let thing = newData[fromIndex] 
     newData.removeAtIndex(fromIndex) 
     newData.insert(thing, atIndex: toIndex) 
    } 
    return newData 
}