Swift 2.0错误来自'[NSIndexPath]？' 到'[indexpath]'只能解包可选

Question

嗨下面的代码在swift1.2中工作正常,但当我升级到swift 2.0时:

func deselectAllRows() {
    if let selectedRows = tableView.indexPathsForSelectedRows as! [NSIndexPath] {
        for indexPath in selectedRows {
            tableView.deselectRowAtIndexPath(indexPath, animated: false)
        }
    }
}

它显示以下错误:

来自'[NSIndexPath]？' 到'[indexpath]'只能解包可选

有关如何解决此问题的任何线索？

Answer 1

您不必再强制类型转换,indexPathsForSelectedRows返回正确的类型:

func deselectAllRows() {
    if let selectedRows = tableView.indexPathsForSelectedRows {
        for indexPath in selectedRows {
            tableView.deselectRowAtIndexPath(indexPath, animated: false)
        }
    }
}