ios - "class not key value coding-compliant [...]" when trying to reference custom view outlets

Question

I'm quite new in the iOS community, so this might be a dumb question. I'm trying to create a custom view with subviews that I can interact with in the code. Here's what I did :

1. I created a PageView.xib
2. I created a PageView.m and PageView.h files
3. In PageView.xib > Identity Inspector > Custom Class > Class, I put "PageView"
4. I dragged a label into the .xib

5. I control+dragged the label into the PageView.h, that has the code

   #import <UIKit/UIKit.h>
   #ifndef LosAngeles_PageView_h
   #define LosAngeles_PageView_h
   
   @interface PageView : UIView
   
   @property (weak, nonatomic) IBOutlet UILabel *label;
   
   @end
   
   #endif
   

6. Then I tried to use this View in a ScrollView I defined in the MainViewController

   - (void)viewDidLoad {
   [super viewDidLoad];
   
       // Get screen dimensions
       CGRect fullScreenFrame = [[UIScreen mainScreen] bounds];
   
       NSMutableArray *pages = [NSMutableArray array];
   
       // Initialize Views
       for(int i = 0; i < kNumberOfPages; i++){
           // Create new Frame
           CGRect pageFrame;
   
           // Set x offset
           pageFrame.origin.x = i * fullScreenFrame.size.width;
           pageFrame.origin.y = 0;
           pageFrame.size = fullScreenFrame.size;
   
           // Get "PageView" nib content
           NSArray *nibContents = [[NSBundle mainBundle] loadNibNamed:@"PageView" owner:nil options:nil];
   
           // Create view from the nib & set its size
           UIView *newPage = [nibContents lastObject];
           newPage.frame = pageFrame;
   
   
           // Add it into the Array & the ScrollView
           [pages addObject:newPage];
           [mainScrollView addSubview:newPage];
       }
   
       // Resize the content of the ScrollView (otherwise it doesn't scroll)
       mainScrollView.contentSize = CGSizeMake(fullScreenFrame.size.width * kNumberOfPages, fullScreenFrame.size.height);
   }
   

7. Tried to run but got an error

    'NSUnknownKeyException', reason: '[<NSObject 0x7a7dbb70>
    setValue:forUndefinedKey:]: this class is not key value 
    coding-compliant for the key label.'
   

What am I doing wrong ?

Extra informations :

• PageView.xib File's Owner shows "Label <-> label" in "Outlets" (only one here)
• the Label view shows "Label <-> File's Owner" in "Referencing Outlets" (only one here as well)
• All three files have the project ticked in the Target Membership
• Everything works fine when I simply don't reference the outlet
• Tried to clean, delete cache and other things of the kind.

Thanks for your time, don't hesitate to ask questions, and I can put the project on Github if anyone wants to see more precisely.

Julien

Answer 1

你可以在这里查看代码。我用新文件“PageViewNew”更新了代码

https://www.dropbox.com/s/eogulm5jkbsero9/losangeles.zip?dl=0

它工作正常。