将Xcode更新为6.3后出现故障

Question

将Xcode更新为版本6.3后，函数中出现错误＆＃34; rotateBlocks＆＃34;：

  

无法表达元组转换＆＃39;（索引：Int，元素：（columnDiff：   Int，rowDiff：Int））＆＃39; to＆＃39;（Int，（Int，Int））

以下代码：

final func initializeBlocks() {
    if let blockRowColumnTranslations = blockRowColumnPositions[orientation] {
        for i in 0..<blockRowColumnTranslations.count {
            let blockRow = row + blockRowColumnTranslations[i].rowDiff
            let blockColumn = column + blockRowColumnTranslations[i].columnDiff
            let newBlock = Block(column: blockColumn, row: blockRow, color: color)
            blocks.append(newBlock)
        }
    }
}

final func rotateBlocks(orientation: Orientation) {
    if let blockRowColumnTranslation:Array<(columnDiff: Int, rowDiff: Int)> = blockRowColumnPositions[orientation] {
        for (idx, (columnDiff:Int, rowDiff:Int)) in enumerate(blockRowColumnTranslation)
        {
            blocks[idx].column = column + columnDiff
            blocks[idx].row = row + rowDiff
        }
    }
}