Iphone 使用segue传回数据时卡住

我正试图使用协议通过segue传回数据。我遵循这个答案：

所以我已经做了：

PageScrollViewController.h

@protocol MyDataDelegate <NSObject, UIPageViewControllerDelegate>

- (void)recieveData:(NSString *)theData;

@end

#import "PageScrollViewController.h"

@interface ContainerViewController : UIViewController <MyDataDelegate>

//...

我被困在这里：

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{

    //Get a handle on the view controller about be presented
    PageScrollViewController *secondViewController = segue.destinationViewController;

    if ([PageScrollViewController isKindOfClass:[PageScrollViewController class]]) {
        PageScrollViewController.delegate = self;
    }
}

行

PageScrollViewController.delegate=self

给出了一个错误：在“PageScrollViewController”类型的对象上找不到属性“delegate”，但我确实将其作为属性添加并合成了它…

您试图调用类型为的对象上的实例方法（

[PageScrollViewController setDelegate:

）

试试这个：

替换

PageScrollViewController *secondViewController = segue.destinationViewController;

  if ([PageScrollViewController isKindOfClass:[PageScrollViewController class]]) {
    PageScrollViewController.delegate = self;
  }

与

---

是否导入了PageScrollViewController？是的，在ContainerViewController的头文件中

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{

    //Get a handle on the view controller about be presented
    PageScrollViewController *secondViewController = segue.destinationViewController;

    if ([PageScrollViewController isKindOfClass:[PageScrollViewController class]]) {
        PageScrollViewController.delegate = self;
    }
}

PageScrollViewController *secondViewController = segue.destinationViewController;

  if ([PageScrollViewController isKindOfClass:[PageScrollViewController class]]) {
    PageScrollViewController.delegate = self;
  }

PageScrollViewController *secondViewController = segue.destinationViewController;

  if ([secondViewController isKindOfClass:[PageScrollViewController class]]) {
    secondViewController.delegate = self;
  }