在点击点放置UIView以启动弹出窗口

Question

我认为这是解决从UITableViewRowAction启动弹出窗口问题的一种相当聪明的方法，我想在目标操作上放置一个明确的UIView并将其用于{ {1}}锚定sourceRect。在这种情况下，目标操作是下面屏幕截图中显示的橙色“Acct”按钮。

我在整个tableview上使用了清晰的UIPopoverPresentationController（UIView），并使用从（我认为）位置派生的框架初始化启动视图（self.clearTopView）视图中的点按（tappedViewOverlay）和point（CGSize）。然后我将其作为子视图添加到tappedRectSize。我现在把它着色为黑色所以我能找到它。

如下面的屏幕截图所示，该计划的一部分正在按计划运行。添加了self.clearTopView视图，并进行了适当的着色。 {EL} tappedViewOverlay（popoverPresentationController）按照预期从此视图启动。

问题是视图始终位于屏幕的左上角，而不是所需的位置，即发生点击的位置。这是相关的代码：

thisPPC

有人可以告诉我哪里出错了吗？

修改

CoderWang在我的代码中指出了疏忽，所以我已经纠正了它：

    else if ([[segue identifier] isEqualToString:@"AccountPopSegue"])
    {

        UITapGestureRecognizer *tapGestureRecognizer;

        CGPoint point = [tapGestureRecognizer locationInView:self.clearTopView];

        NSString *pointString = NSStringFromCGPoint(point);

        NSLog(@"point is located at %@",pointString);


        CGSize tappedRectSize= CGSizeMake(60,60);
        CGRect tappedRect = {point,tappedRectSize};

        NSString * tappedRectString = NSStringFromCGRect(tappedRect);

        NSLog(@"tappedRect = %@",tappedRectString);


        tappedViewOverlay = [[UIView alloc]initWithFrame:tappedRect];
        tappedViewOverlay.backgroundColor = [UIColor blackColor];

        [self.clearTopView addSubview:tappedViewOverlay];

        [self.clearTopView setUserInteractionEnabled:NO];


        NSString *tappedOverlayFrame = NSStringFromCGRect(tappedViewOverlay.frame);
        NSLog(@"tappedViewOverlay.frame = %@",tappedOverlayFrame);


        UIViewController *controller = segue.destinationViewController;
        controller.popoverPresentationController.delegate = self;
        controller.preferredContentSize = CGSizeMake(320, 186);
        UIPopoverPresentationController *thisPPC = controller.popoverPresentationController;


        thisNavController = (UINavigationController *)segue.destinationViewController;
        AccountChangeVC *acCVC = (AccountChangeVC *)thisNavController.topViewController;
        acCVC.delegate = self;

        thisPPC.sourceView = self.clearTopView;
        thisPPC.sourceRect = tappedViewOverlay.bounds;

此更改（ else if ([[segue identifier] isEqualToString:@"AccountPopSegue"]) { UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc]init]; [self.clearTopView addGestureRecognizer:tapGestureRecognizer]; CGPoint point = [tapGestureRecognizer locationInView:self.clearTopView]; NSString *pointString = NSStringFromCGPoint(point); NSLog(@"point is located at %@",pointString); CGSize tappedRectSize= CGSizeMake(60,60); CGRect tappedRect = {point,tappedRectSize}; NSString * tappedRectString = NSStringFromCGRect(tappedRect); NSLog(@"tappedRect = %@",tappedRectString); tappedViewOverlay = [[UIView alloc]initWithFrame:tappedRect]; tappedViewOverlay.backgroundColor = [UIColor blackColor]; [self.clearTopView addSubview:tappedViewOverlay]; [self.clearTopView setUserInteractionEnabled:NO]; NSString *tappedOverlayFrame = NSStringFromCGRect(tappedViewOverlay.frame); NSLog(@"tappedViewOverlay.frame = %@",tappedOverlayFrame); UIViewController *controller = segue.destinationViewController; controller.popoverPresentationController.delegate = self; controller.preferredContentSize = CGSizeMake(320, 186); UIPopoverPresentationController *thisPPC = controller.popoverPresentationController; thisNavController = (UINavigationController *)segue.destinationViewController; AccountChangeVC *acCVC = (AccountChangeVC *)thisNavController.topViewController; acCVC.delegate = self; thisPPC.sourceView = self.clearTopView; thisPPC.sourceRect = tappedViewOverlay.bounds; 的初始化和tapGestureRecognizer的添加）会使黑色self.clearTopView视图的位置略有变化。您可以在以下屏幕截图中看到它隐藏在“后退”导航按钮后面：

Answer 1

问题在于＆＃39; tappedRect＆＃39;是不正确的，完全不知道原因。 但你可以尝试以下方法来获取＆＃34; Acct＆＃34;按钮转换为self.clearTopView：

CGRect tappedRect = [Acct.superview convertRect:acct.frame toView:self.clearTopView];

或转换为窗口（因为self.clearTopView在整个tableview上）：

CGRect tappedRect = [Acct.superview convertRect:acct.frame toView:nil];