Question

每当我在<代码>上有数据时,便可读,而且我开始删除,就进行罚款。然而,当我拿到桌上最后物体并删除时,它便坠毁。

Terminating app due to uncault particular NS InternalInconsistency Exception,êt: Invalid Update: Disability number ofrow in section 0. 更新(1)后现有一节所载行数必须等于更新(1)之前该节所载行数,加上或减去该节所插入或删除的行数(加插,1删除)。

在这里,我如何做编辑工作:

-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        // Delete the row from the data source
        if ([myData count] >= 1) {
            [tableView beginUpdates];
            [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
            [myData removeObjectAtIndex:[indexPath row]];

            NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
            NSString *documentsDirectory = [paths objectAtIndex:0];
            NSString *somepath = [documentsDirectory stringByAppendingPathComponent:@"something.plist"];
            [myData writeToFile:somepath atomically:YES];
            [table reloadData];
            if ([myData count] == 0) {
                [tableView endUpdates];
                [tableView reloadData];
            }
            else {
            [tableView endUpdates];
            }
        }
    }   
}

而且:

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    // Return the number of rows in the section.
    if ([myData count] != 0) {
        return [myData count];
    }
    else {
        return 1;
    }
}

The reason I m returning 1 is because I m making a cell that says "No data saved" in cellForRowAtIndexPath. Here s what I mean:

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    }    
    if ([cityData count] != 0) {
        //normal setup removed for clarity
    }
    else {
        cell.textLabel.text = @"No saved data!";
    cell.textLabel.font = [UIFont boldSystemFontOfSize:14]; 
    cell.textLabel.textAlignment = UITextAlignmentCenter;
    cell.selectionStyle = UITableViewCellSelectionStyleNone;
        cell.tag = 1;
    return cell;
    }
}

So, what am I doing wrong in my editing code to get this error? Thanks!

Answer 1

如果您删除了表格中的最后一行,UITableView代码预计会剩下0行。它请您的<代码>可检索的方法,以确定有多少人离开。由于你有一个“无数据”小组,它只剩下1个,而不是0个。因此,在您的表格中删除最后一行时,请打电话-insertRowsAtIndexPaths:with Row Animation:,以插入你的“无数据”。另外,在这种方法中,你也不应打上<代码>-reloadData。 <代码>更新将考虑重载受影响浏览器。引证:

-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        // Delete the row from the data source
        if ([myData count] >= 1) {
            [tableView beginUpdates];
            [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
            [myData removeObjectAtIndex:[indexPath row]];

            NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
            NSString *documentsDirectory = [paths objectAtIndex:0];
            NSString *somepath = [documentsDirectory stringByAppendingPathComponent:@"something.plist"];
            [myData writeToFile:somepath atomically:YES];

            if ([myData count] == 0) {
                [tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
            }
            [tableView endUpdates];
        }
    }   
}

Answer 2

首先从我的数据库中删除,然后从表格中删除。

-(void)tableView:(UITableView *)tableView commitEditingStyle: 
(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {

if (editingStyle == UITableViewCellEditingStyleDelete) {
        //somehting...
        [myData removeObjectAtIndex:[indexPath row]];
        [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
        //somehting...
    iii
iii

iii

Answer 3

表格:编号OfRowsInsection 一定要归还准确的几行:



- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    // Return the number of rows in the section.
    return [myData count];
}


在删除最后一行之后,您不妨删除整节。 缩略语

-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        // Delete the row from the data source
        [tableView beginUpdates];
        [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
        [myData removeObjectAtIndex:[indexPath row]];
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        NSString *somepath = [documentsDirectory stringByAppendingPathComponent:@"something.plist"];
        [myData writeToFile:somepath atomically:YES];
        if ([myData count] == 0) {
            // NEW! DELETE SECTION IF NO MORE ROWS!
            [tableView deleteSections:[NSIndexSet indexSetWithIndex:[indexPath section]] withRowAnimation:UITableViewRowAnimationFade];
        }
        [tableView endUpdates];
    }   
}

友情链接