類型'AnyObject'不符合協議'Hashable'

Question

我正在將現有的Objective-C項目轉換為Swift。 我正在轉換一個函數，我得到上述錯誤。 請檢查以下代碼。

Objective-C的

- (IBAction)accessoryButtonTapped:(id)sender event:(id)event
{
    NSSet *touches = [event allTouches];
    UITouch *touch = [touches anyObject];
    CGPoint currentTouchPosition = [touch locationInView:self.tableView];
    NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint: currentTouchPosition];
    if (indexPath != nil) {
        [self tableView: self.tableView accessoryButtonTappedForRowWithIndexPath: indexPath];
    }
}

這是快捷的代碼。

@IBAction func accessoryButtonTapped(sender: AnyObject, event: AnyObject) {
    let touches: Set<AnyObject> = event.allTouches()! // I am getting the ERROR here
    let touch: UITouch = touches.first!
    let currentTouchPosition: CGPoint = touch.locationInView(self.tableView)
    let indexPath: NSIndexPath = self.tableView.indexPathForRowAtPoint(currentTouchPosition)!

    self.tableView(self.tableView, accessoryButtonTappedForRowWithIndexPath: indexPath)
}

誰能告訴我我在做什么呢？

Answer 1

allTouches（）函數不返回Set of AnyObject。 它返回一組UITouch對象。 請查看文檔。 這是正確的代碼。

@IBAction func accessoryButtonTapped(sender: AnyObject, event: AnyObject) {
    let touches: Set<UITouch> = event.allTouches()!
    let touch: UITouch = touches.first!
    let currentTouchPosition: CGPoint = touch.locationInView(self.tableView)
    let indexPath: NSIndexPath = self.tableView.indexPathForRowAtPoint(currentTouchPosition)!

    self.tableView(self.tableView, accessoryButtonTappedForRowWithIndexPath: indexPath)
}