我想在选择一行后填充一个数组。现在我想使用一个函数填充一个数组。情况就是这样。我有一个显示专辑标题的表格视图。当您选择一行时,您会使用 FGallery 库显示所有图片。这是我填充数组的函数。
- (NSMutableArray *)getAllPicturesOfAlbumId: (int)AlbumId
{
NSLog(@"tot hier");
_picturesForAlbum = [[NSMutableArray alloc]init];
NSArray *results = [[NSArray alloc]init];
//picture_Url = @"";
NSLog(@"tot hier");
NSFetchRequest *request = [[NSFetchRequest alloc] init];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"whichAlbum.album_id == %d", AlbumId];
[request setEntity:[NSEntityDescription entityForName:@"Picture" inManagedObjectContext:self.genkDatabase.managedObjectContext]];
[request setPredicate:predicate];
NSError *error = nil;
NSLog(@"tot hier");
results = [self.genkDatabase.managedObjectContext executeFetchRequest:request error:&error];
if (results == nil) {
// handle errors
NSLog(@"geen resultaten");
} else if (results.count == 0) {
// nothing found
NSLog(@"0 resultaten");
} else {
for(int i = 0; i < results.count ; i++){
// NSLog(@"%@",[results valueForKey:@"url"]);
[_picturesForAlbum addObject: [results valueForKey:@"url"]];
}
}
return _picturesForAlbum;
}
这是我的 FGallery 方法。
- (int)numberOfPhotosForPhotoGallery:(FGalleryViewController *)gallery
{
return [networkImages count];
}
- (FGalleryPhotoSourceType)photoGallery:(FGalleryViewController *)gallery sourceTypeForPhotoAtIndex:(NSUInteger)index
{
return FGalleryPhotoSourceTypeNetwork;
}
- (NSString*)photoGallery:(FGalleryViewController *)gallery urlForPhotoSize:(FGalleryPhotoSize)size atIndex:(NSUInteger)index {
return [networkImages objectAtIndex:index];
}
这就是我在 didSelectRowAtIndexPath 中所做的
networkImages = [[NSArray alloc] initWithArray:[self getAllPicturesOfAlbumId:indexPath.row]];
networkGallery = [[FGalleryViewController alloc] initWithPhotoSource:self];
[self.navigationController pushViewController:networkGallery animated:YES];
出于某种原因,我的networkImages被填充了几次,它从方法“getAllPicturesOfAlbumId”返回的数组因此我认为我收到以下错误。
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayI length]: unrecognized selector sent to instance 0xa15d090'
有人知道问题是什么吗?
提前致谢。