我认为这是解决从 UITableViewRowAction 启动弹出窗口的问题的一种相当聪明的方法，我想在目标操作上放置一个清晰的 UIView并将它用于 sourceRect 以锚定 UIPopoverPresentationController。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 上使用清晰的 UIView (self.clearTopView) 并使用以下命令初始化启动 View (tappedViewOverlay)从 View 中的点击位置 (point) 和 CGSize (tappedRectSize) 派生的框架(我认为是这样)。然后我将它作为 subview 添加到 self.clearTopView。我目前正在把它涂成黑色，这样我就可以找到它。

如下图所示，部分方案正在按计划进行。 tappedViewOverlay View 已添加，并适当着色。 popoverPresentationController (thisPPC) 按预期从此 View 启动。

问题是 View 总是位于屏幕的左上角，而不是所需的位置，即点击发生的位置。这是相关代码:

    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;

谁能告诉我哪里出错了？

编辑

CoderWang 指出了我的代码中的一个疏忽，所以我已经更正了它:

    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;

此更改(tapGestureRecognizer 的初始化和添加到 self.clearTopView)会导致黑色 tappedViewOverlay View 的位置发生轻微变化.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:

最佳答案

问题是'tappedRect'不正确，不知 Prop 体原因。 但是您可以尝试以下方法将“Acct”按钮的 rect 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 覆盖了整个 tableview):

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

关于ios - 将 UIView 定位在点击点以启动弹出窗口，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38490169/