ios - UIPageViewController 中的按钮

Question

我想将 UIButton 添加到我的 UIViewController。我在所有屏幕上都有一个 UIPageViewController。当我尝试添加此按钮时...屏幕上没有可见按钮。我做错了什么？

代码:

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [button addTarget:self
               action:@selector(setButtonVisibleClose:)
     forControlEvents:UIControlEventTouchUpInside];
    [button setTitle:@"Zamknij widok" forState:UIControlStateNormal];
    button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);
    button.backgroundColor = [UIColor whiteColor];
    [self.view addSubview: button];


    self.pageController = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];

    self.pageController.dataSource = self;
    [[self.pageController view] setFrame:[[self view] bounds]];

    BasicViewViewController *initialViewController = [self viewControllerAtIndex:0];

    [initialViewController setImageViewToDisplay];

    NSArray *viewControllers = [NSArray arrayWithObject:initialViewController];

    [self.pageController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];

    [self addChildViewController:self.pageController];
    [[self view] addSubview:[self.pageController view]];
    [self.pageController didMoveToParentViewController:self];

Answer 1

您的问题很可能是您首先将按钮添加为 subview ，然后创建了页面 Controller 并将其 View 添加到按钮“之上”。默认情况下，先添加的 subview 始终位于 稍后添加的 subview 之下。

如果您在该方法中将按钮创建代码移动到页面 Controller 代码之后，您的按钮应该出现在页面 Controller 的顶部。