ios - 导航栏中的页面指示器和标题iOS Objective C

Question

我想创建一个导航栏，其中我有一个导航栏中pageControl的标题，就像 twitter iOS 应用程序包含的一样，我通过设置

self.navigationItem.Title = @"Home";

并PageControl通过创建实例UIPageControl并将其中心设置为导航栏的中心并使用UINavigationController'sDelegate实现其导航检测来实​​现。但问题是 pageControl 和标题相互重叠。我怎样才能这样设置标题应该出现在页面指示器的顶部。这是定位的代码pageControl。

self.navigationController.delegate = self;  
CGSize navBarSize = self.navigationController.navigationBar.bounds.size;  
CGPoint origin = CGPointMake( navBarSize.width/2, navBarSize.height/2 );  
self.pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(origin.x, origin.y,
                                                                   0, 0)];  
[self.pageControl setNumberOfPages:3];  
[self.navigationController.navigationBar addSubview:self.pageControl];

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated{
int index = [self.navigationController.viewControllers indexOfObject:viewController];  
self.pageControl.currentPage = index;  }

Answer 1

我想通了，两者（标题和pageControl）都相互重叠，所以我只是改变了pageControl的Y轴和

self.navigationController.delegate = self;  
CGSize navBarSize = self.navigationController.navigationBar.bounds.size;  
CGPoint origin = CGPointMake( navBarSize.width/2, navBarSize.height/2 );  
self.pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(origin.x, origin.y+45,
                                                               0, 0)]; //Here added 45 to Y and it did the trick 
[self.pageControl setNumberOfPages:3];  
[self.navigationController.navigationBar addSubview:self.pageControl];

- (void)navigationController:(UINavigationController *)navigationController     willShowViewController:(UIViewController *)viewController animated:(BOOL)animated{
int index = [self.navigationController.viewControllers indexOfObject:viewController];  
self.pageControl.currentPage = index;  }