Question

我有一个应用程序，我在其中存储textLabel和detailTextLabel并将其加载到带有原型单元格的UITableView。一切都运作良好。我拍了一张照片并将其存储在我的文档目录中并检索它并在UIImageView中显示它。再好。我试图将图像保存到我的coreData并在TableView中显示它，但每个单元格的图片不同。这是我将图像数据保存到coreData的代码：

NSString *stringOneb = fileName2;
NSString *stringTwob = [stringOneb stringByAppendingString:@","];
NSString *stringFour = [stringTwob stringByAppendingString:yourName];

NSArray *paths1 = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                                      NSUserDomainMask, YES);
NSString *documentsDirectory1 = [paths1 objectAtIndex:0];
NSString *slash3 = [documentsDirectory1 stringByAppendingPathComponent:@"/Images"];


NSString *fullPath1 = [slash3 stringByAppendingPathComponent:stringFour];
fullPath1 = [fullPath1 stringByAppendingFormat:@".png"];
//Now load the image at fullPath and install it into our image view's image property.
if (![[NSFileManager defaultManager] fileExistsAtPath:fullPath1]){

}
else {
    NSURL *url = [NSURL URLWithString:fullPath1];
    NSData *data5 = [[NSData alloc] initWithContentsOfURL:url];
    UIImage *cellimage = [UIImage imageWithData:data5];
    photoView2.image = [UIImage imageWithContentsOfFile: fullPath1];
    myimageData = [NSData dataWithData:UIImagePNGRepresentation(cellimage)];
}
 NSManagedObject *newDevice = [NSEntityDescription insertNewObjectForEntityForName:@"Cell" inManagedObjectContext:context];
        [newDevice setValue:yourName forKey:@"name"];

        [newDevice setValue:Seven forKey:@"winloss"];

        [newDevice setValue:myimageData forKey:@"image"];

        NSError *error7 = nil;
        // Save the object to persistent store
        if (![context save:&error]) {
            NSLog(@"Can't Save! %@ %@", error7, [error7 localizedDescription]);
        }

    }
    else {
        NSManagedObjectContext *context = [self managedObjectContext];
        NSManagedObject *selectedDevice = [self.tableDataMainView objectAtIndex:indexNumber ];
        [selectedDevice setValue:yourName forKey:@"name"];

        [selectedDevice setValue:Seven forKey:@"winloss"];

        [selectedDevice setValue:myimageData forKey:@"image"];
        NSError *error7 = nil;
        // Save the object to persistent store
        if (![context save:&error]) {
            NSLog(@"Can't Save! %@ %@", error7, [error7 localizedDescription]);
        }

我没有收到任何错误，因此我假设图像已被保存。

这就是我尝试在TableView单元格中检索图像的方法

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

// Configure the cell...
NSManagedObject *device = [self.tableDataMainView objectAtIndex:indexPath.row];
[cell.textLabel setText:[device valueForKey:@"name"]];
cell.detailTextLabel.frame = CGRectMake(16, 35, 200, 65);
[cell.detailTextLabel setText:[device valueForKey:@"winloss"]];
[cell.imageView setImage:[device valueForKey:@"image"]];

[cell.textLabel setTextColor:[UIColor whiteColor]];
[cell.detailTextLabel setTextColor:[UIColor whiteColor]];


return cell;

}

如果我在我的主要包中引用一个图像，它会显示但是当我引用valueForKey时：@“image”我什么都没得到。

不确定我做错了什么，有人可以提供帮助。感谢

Answer 1

弄明白了。我刚刚在我的coredata中引用了图像的名称，然后将其加载到tableview

中

在coreData uiTableView xcode中添加图像

1 个答案: