在 UIBarButtonItem 内的 UIButton 周围显示弹出窗口

Question

当 userUIBtn 被点击时，

userButtonPressed 以 UIButton 作为参数被调用。

但是，我想 访问 UIBarButtonItem，以便在周围显示弹出窗口。

这里是generateToolbar()方法，生成用户导航按钮。

-(void) generateToolbar {

    // Initialize the `ButtonFactory`

    ButtonFactory *buttonFactory = [[ButtonFactory alloc] init];

    // Generate some `UIButton(s)`

    UIButton *userUIBtn = [buttonFactory createButtonWithButtonType:ButtonTypeUser];
    userUIBtn.frame = CGRectMake(0,0,55,20);

    // Add an action to the `UIButton`        

    [userUIBtn addTarget:self action:@selector(userButtonPressed:) forControlEvents:UIControlEventTouchUpInside];

    // Generate an `UIBarButtonItem` with the `UIButton` as basis view

    UIBarButtonItem *userBtn = [[UIBarButtonItem alloc] initWithCustomView:userUIBtn];

    // Add the `UIBarButtonItem` into the right side of the `navigationItem`

    self.navigationItem.rightBarButtonItems = [[NSArray alloc] initWithObjects: userBtn, nil];

}

这是 userButtonPressed() 方法，它通过按下 user 按钮触发，并在该按钮周围生成一个弹出窗口 - 它不是叫.

- (IBAction) userButtonPressed:(UIBarButtonItem*)sender {

    // Initialize the `ButtonFactory`
    ButtonFactory *buttonFactory = [[ButtonFactory alloc] init];

    // Generate some `UIButton(s)`
    UIButton *feedbackUIBtn = [buttonFactory createButtonWithButtonType:ButtonTypeFeedback iconVisibility:YES textVisibility:YES capitalization:NO iconSize:20.0 textSize:20.0];
    [feedbackUIBtn addTarget:self action:@selector(feedbackBtnClicked:) forControlEvents:UIControlEventTouchUpInside];
    feedbackUIBtn.frame = CGRectMake(0,50,300,50);

    // Create a `UIViewController` and add the `UIButtons` as subviews
    UIViewController *viewController = [[UIViewController alloc] init];
    [viewController.view addSubview:feedbackUIBtn];

    // Present the `UIViewController`
    viewController.modalPresentationStyle = UIModalPresentationPopover;
    [self presentViewController:viewController animated:YES completion:nil];

    // Set up the `UIPopoverPresentationController`
    UIPopoverPresentationController *popController = [viewController popoverPresentationController];
    popController.permittedArrowDirections = UIPopoverArrowDirectionUp;
    popController.barButtonItem = sender;

}

Answer 1

我的解决方案是在两个地方编辑动作处理程序，我将参数从 UIBarButtonItem 更改为 UIButton，并将 popController.barButtonItem = sender; 更改为 popController.sourceView = sender;。

- (IBAction) userButtonPressed:(UIButton*)sender {
    ...
    popController.sourceView = sender;
    ...
}

在 UIBarButtonItem 内的 UIButton 周围显示弹出窗口

Displaying a popover around a UIButton inside UIBarButtonItem

objective-c

selector

uibutton

uibarbuttonitem

ibaction