我开始使用iCarousel,但得到了以下错误:
Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIView 0x8372530> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key dataSource.'我用了这个例子iCarousel
我的代码:
#import <UIKit/UIKit.h>
#import "iCarousel.h"
@interface UsersViewController : UIViewController <iCarouselDataSource, iCarouselDelegate>
@property (strong, nonatomic) IBOutlet iCarousel *aCarousel;
@property (strong, nonatomic) IBOutlet UILabel *label;
@property (nonatomic) BOOL wrap;
@property (strong, nonatomic) NSMutableArray *animals;
@property (strong, nonatomic) NSMutableArray *descriptions;
- (IBAction)onTapBackButton:(id)sender;
@end
#import "UsersViewController.h"
@interface UsersViewController ()
@end
@implementation UsersViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
_wrap = NO;
self.animals = [NSMutableArray arrayWithObjects:@"Bear.png",
@"Zebra.png",
@"Tiger.png",
@"Goat.png",
@"Birds.png",
@"Giraffe.png",
@"Chimp.png",
nil];
self.descriptions = [NSMutableArray arrayWithObjects:@"Bears Eat: Honey",
@"Zebras Eat: Grass",
@"Tigers Eat: Meat",
@"Goats Eat: Weeds",
@"Birds Eat: Seeds",
@"Giraffes Eat: Trees",
@"Chimps Eat: Bananas",
nil];
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.aCarousel.type = iCarouselTypeCoverFlow2;
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Main Actions
- (IBAction)onTapBackButton:(id)sender
{
[self dissmis];
}
#pragma mark - Main methods
- (void)dissmis
{
[self dismissViewControllerAnimated:YES completion:nil];
}
#pragma - mark iCarousel Delegate
- (NSUInteger)numberOfItemsInCarousel:(iCarousel *)carousel
{
return [self.animals count];
}
- (NSUInteger)numberOfVisibleItemsInCarousel:(iCarousel *)carousel
{
// limit the number of item views loaded concurrently (for performance)
return 7;
}
- (UIView*)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSUInteger)index reusingView:(UIView *)view
{
// create a numbered view
view = [[UIImageView alloc] initWithImage:[UIImage imageNamed:[self.animals objectAtIndex:index]]];
return view;
}
- (NSUInteger)numberOfPlaceholdersInCarousel:(iCarousel *)carousel
{
return 0;
}
- (CGFloat)carouselItemWidth:(iCarousel *)carousel
{
// usually this should be slightly wider than the item views
return 240;
}
- (BOOL)carouselShouldWrap:(iCarousel *)carousel
{
return self.wrap;
}
- (void)carouselDidScroll:(iCarousel *)carousel
{
[self.label setText:[NSString stringWithFormat:@"%@", [self.descriptions objectAtIndex:carousel.currentItemIndex]]];
}
@end发布于 2013-08-15 13:25:05
我不知道具体的问题是什么,但在看了其他几个帖子后,我认为这是问题的前5位,希望它能帮上忙,祝你好运。
1.
我发现了这个错误最常见的地方是,当您从一个不是xib所有者的类中实例化来自xib的视图时。 我的意思是,你可能会称之为类似的东西: [NSBundle mainBundle loadNibNamed:@"MyView“owner:self options: so ];您正在更改所有者,因此必须确保self引用的类具有"MyView”所需的所有IBOutlet属性。这通常是在Interface中完成的,但在这种情况下,您是以编程方式设置所有者的,这意味着您无法在IB中建立连接。当IBOutlets不在的时候,应用程序试图建立这些连接,但是失败了,给出了你看到的错误。 我的建议(不知道比你目前所提供的信息更多)是检查你是否在没有适当的IBOutlets的情况下打过这个电话。
2.
我已经将接口构建器中的UIControl出口连接到xib所有者的IBOutlet上。由于某种原因,IBOutlet被从所有者中删除,但是对出口的引用仍然在xib中悬空。这将总是给我一个错误的教训:当删除实现中的vars的任何出口时,请确保取消IB中相应的连接。
3.
我发现了这个问题,是因为我在AboutViewController中使用了一个按钮,我没有为那个按钮声明属性。
4.
另外,在重命名视图时,不要忘记删除文件所有者上的引用。它还可能引发此错误。
5.
修正-转到iOS模拟器>重置内容和设置
https://stackoverflow.com/questions/18253190
复制相似问题