Iphone PrepareforSegue未显示destinationviewcontroller

Segue destinationviewcontroller pdfviewcontroller不显示页面ViewController

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:@"MYSegue"]) {

    // Get destination view
    PDFViewController *pdfviewController = [segue destinationViewController];
    NSString *path = [[NSBundle mainBundle] pathForResource:@"paper" ofType:@"pdf"];
    PageViewController *page = [[PageViewController alloc] initWithPDFAtPath:path];
    pdfviewController= page;

}
}

- (void)viewDidLoad {
    [super viewDidLoad];

    PageViewController *page = [[PageViewController alloc] initWithPDFAtPath:self.path];
    page.view.frame = self.view.bounds;
    [self.view addSubview:page.view];
    [self addChildViewController:page];
    self.page = page;
}

仅显示导航栏和backbuttonitem

并显示从pageviewcontroller strong分配给pdfviewcontroller strong的语义问题不兼容指针类型

谢谢你的帮助。

这行错了：

pdfviewController=第页

正如编译器告诉您的，类型是

PDFViewController*

，您正在尝试分配

PageViewController*

你是说：

pdfviewController.page = page;

---

segue应该只做：

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([[segue identifier] isEqualToString:@"MYSegue"]) {
        // Get destination view
        PDFViewController *pdfViewController = [segue destinationViewController];
        NSString *path = [[NSBundle mainBundle] pathForResource:@"paper" ofType:@"pdf"];

        pdfViewController.path = path;
    }
}

向pdf视图控制器添加一些属性：

@property (copy, nonatomic) NSString *path;
@property (strong, nonatomic) PageViewController *page;

然后在pdf视图控制器中

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:@"MYSegue"]) {

    // Get destination view
    PDFViewController *pdfviewController = [segue destinationViewController];
    NSString *path = [[NSBundle mainBundle] pathForResource:@"paper" ofType:@"pdf"];
    PageViewController *page = [[PageViewController alloc] initWithPDFAtPath:path];
    pdfviewController= page;

}
}

- (void)viewDidLoad {
    [super viewDidLoad];

    PageViewController *page = [[PageViewController alloc] initWithPDFAtPath:self.path];
    page.view.frame = self.view.bounds;
    [self.view addSubview:page.view];
    [self addChildViewController:page];
    self.page = page;
}

---

我想在PDFviewController中显示pageviewcontroller，但它们是什么？它们是你的吗？你是从github买的吗？你认为它们是如何结合在一起的？如果你看看我的这个问题，你可能会理解我的问题。感谢您的时间和帮助。您不应该再次发布相同的问题，而应该编辑原始问题。另外一个问题没有说明任何关于类定义的内容。为什么要尝试使用2个视图控制器，它们之间的关系应该是什么（为什么不封装在PDF视图控制器中）？可能重复