我在将照片保存到核心数据时遇到问题。我试图将它保存为一个在实体中设置为“可变形”的属性。我已经看到了关于这个的各种讨论,并且共识似乎是在iOS5和更高版本中,我不需要使用编码器,因为UIImage现在符合NSCoding。当我尝试保存核心数据时出现错误。请看下面我用来保存照片的代码...将UIImage保存到核心数据时出错
- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSString *mediaType = [info objectForKey: UIImagePickerControllerMediaType];
UIImage *originalImage, *editedImage, *imageToSave;
// Handle a still image capture
if (CFStringCompare ((CFStringRef) mediaType, kUTTypeImage, 0) == kCFCompareEqualTo) {
editedImage = (UIImage *) [info objectForKey:UIImagePickerControllerEditedImage];
originalImage = (UIImage *) [info objectForKey:UIImagePickerControllerOriginalImage];
if (editedImage) {
imageToSave = editedImage;
} else {
imageToSave = originalImage;
}
// Convert image to Data for entry into Core Data
NSData *imageData = [NSData dataWithData:UIImagePNGRepresentation(imageToSave)];
// Add image to Core Data
myEntity.attribute = imageData;
NSError *error = nil;
if (![managedObjectContext save:&error]) {
NSLog(@"Error when saving core data");
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort();
}
}
[[picker parentViewController] dismissModalViewControllerAnimated: YES];
[picker release];
}
你正在收到什么错误? – Zalykr 2012-04-05 12:17:57
为什么不将图像保存到Document目录,只需将其路径保存为NSString?它的方式比你更有效率..刚做了几分钟前.. – 2012-04-05 12:19:24
我得到的错误在很大程度上是无益的:保存核心数据时出错。未解决的错误[null],[null]。 – 2012-04-05 12:27:27