Question

我有一个BasicView：

#import "BasicView.h"

@implementation BasicView

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
    }
    return self;
}

+(instancetype)initializeFromNib:(NSString*)nibName {
    return (BasicView*)[[[NSBundle mainBundle] loadNibNamed:nibName owner:self options:0] objectAtIndex:0];
}

继承自它的观点：

@interface AlbumPicturesView : BasicView

/**
 The pictures label - need be removed once there are pictures in the album
 */
@property (weak, nonatomic) IBOutlet UILabel *picturesLabel;

/**
 The pictures cell view
 */
@property (weak, nonatomic) IBOutlet UICollectionView *picturesCollectionView;


@end

#import "AlbumPicturesView.h"

@implementation AlbumPicturesView

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
    }
    return self;
}


/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
    // Drawing code
}
*/

@end

使用xib文件。

我尝试使用以下功能在屏幕上显示此视图：

/**
 Show the pictures view view on the right position on the screen
 */

    -(void) showPicturesView {
       _albumPicturesView = [AlbumPicturesView initializeFromNib:VIEW_ALBUM_PICTURES];
        [self.view addSubview:_albumPicturesView];
        float yPosition = _albumIconsView.frame.origin.y + _albumIconsView.frame.size.height;
        float height = self.view.frame.size.height - yPosition;
        _albumPicturesView.frame = CGRectMake(_albumPicturesView.frame.origin.x, yPosition, _albumPicturesView.frame.size.width, height);
    }

但我一直得到：

[<AlbumPicturesView 0x113104> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key picturesCollectionView.

虽然这一切都在界面构建器中设置..有人可以解释一下原因吗？

Answer 1

您可能在IB中有一个连接到picturesCollectionView的插座。现在你的课程中不再存在该插座（或者它是不正确的课程类型）。你也需要在IB中删除它。

另一种可能性，您已选择BasicView作为xib中的类而不是AlbumPicturesView。

iOS加载xib给出setValue：forUndefinedKey：]

1 个答案: