将旧的C for循环更改为新的Swift循环

Question

我有旧的Xcode 7.3 Swift 2代码。我需要将这两个for循环更改为新的swift 3 for循环语法。

fileprivate func collapseSubItemsAtIndex(_ index : Int) { 

    var indexPaths = [IndexPath]() 
    let parent = self.findParent(index) 
    checkCurrentLanguage() 

    if lang.isEqual(to: "en") 
    { 
     //For loop 1 
     for (var i = index + 1; i <= index + self.engsubItems[parent].count; i += 1){ 
      indexPaths.append(IndexPath(row: i, section: 0)) 
     } 
     self.engtableview.deleteRows(at: indexPaths, with: UITableViewRowAnimation.fade) 
     self.engtotal -= self.engsubItems[parent].count 

    } 
    else{ 
     //For loop 2 
     for (var i = index + 1; i <= index + self.subItems[parent].count; i += 1){ 
      indexPaths.append(IndexPath(row: i, section: 0)) 
     } 
     self.tableView.deleteRows(at: indexPaths, with: UITableViewRowAnimation.fade) 
     self.total -= self.subItems[parent].count 

    } 
} 

Answer 1

let count = self.engsubItems[parent].count 

let rowsToDelete = ((index + 1) ... (index + count)) 
    .map { IndexPath(row: $0, section: 0) } 
self.engtableview.deleteRows(at: rowsToDelete, with: UITableViewRowAnimation.fade) 
self.engtotal -= count 

Answer 2

for i in (index+1)...(index + self.engsubItems[parent].count) { 
    ... 
} 
for i in (index+1)...(index + self.subItems[parent].count) { 
    ... 
}