在页面视图控制器中以编程方式使用视图控制器

Question

我有一个故事板应用程序。我使用几个View控制器与segues来根据选择的项目从表视图中进行选择。我想要一个页面视图控制器，其中页面将成为故事板中的一个或多个视图控制器，甚至可以重复它们。我试图init这样的页面视图控制器： .... self.dataSource = self;

UIViewController *initialViewController =[self viewControllerAtIndex:current]; 
NSArray *viewControllers = [NSArray arrayWithObject:initialViewController]; 


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

- (UIViewController *)viewControllerAtIndex:(NSUInteger)index 
{ 
if ((descriptions.count == 0) || 
    (index >= descriptions.count)) { 
    return nil; 
} 

current=index; 

// Create a new view controller and pass suitable data. 
NSString *language = [[NSLocale preferredLanguages] objectAtIndex:0]; 

Description *description=[DBCompany getDescriptionById:language descriptionId:[[descriptions objectAtIndex:index] integerValue]]; 

UIViewController *viewController=nil; 
if(description.frame==100){ 
    viewController=[[Company100ViewController alloc] init]; 
    ((Company100ViewController*)viewController).companyId = companyId; 
} 
return viewController; 
} 

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController 
{ 
if ((descriptions.count == 0) || 
    (current-1 < 0)) { 
    return nil; 
} 

return [self viewControllerAtIndex:current-1]; 
} 

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController 
{ 
if ((descriptions.count == 0) || 
    (current >= descriptions.count)) { 
    return nil; 
} 

return [self viewControllerAtIndex:current+1]; 
} 

但viewcontroller显示为黑色。我认为是因为我添加了UIviewcontroller类，但没有将它连接到任何视图XIB，就我而言，这是故事板。

如何以编程方式使用故事板中的不同视图控制器在页面视图控制器中使用？

Answer 1

如果你做viewController = [[Company100ViewController alloc] init]，那么是的，这不是一个与故事板或XIB关联的控制器。为了与厦门国际银行加载控制器，你必须做到以下几点：

UIStoryboard *sb = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil]; 
Company100ViewController * vc = (Company100ViewController *)[sb instantiateViewControllerWithIdentifier:@"vc-identifier"]; 

在故事板确保你设置视图控制器的id设置为VC-标识符;无论您选择何种标识符

Answer 2

斯威夫特3

let sb = UIStoryboard(name: "MainStoryboard", bundle: nil) 
let vc = sb.instantiateViewController(withIdentifier: "vc-identifier") 

Answer 3

斯威夫特

如果你想从UIViewController对象初始化。

guard let vc = storyboard?.instantiateViewController(withIdentifier: "nameVC") else { 
    return 
} 

// add to current view 
view.addSubview(vc.view)