Question

我正在尝试在我的标签上添加一些文字。一旦文本大于单元格的指定高度。我希望细胞也能增长。我确实添加了以下代码来处理我的标签高度，但我不知道如何将它传播到我的单元格。

代码

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.navigationItem.title = @"Scribbles";
    //Array
    Scribble *scribble1 = [Scribble new];
    [scribble1 setTitle:@"Test 1" andBody:@"This is fun! This is fun! This is fun! This is fun! This is fun! This is fun! This is fun! This is fun! This is fun! This is fun! This is fun!" andImage:@"scribble.png"];
    Scribble *scribble2 = [Scribble new];
    [scribble2 setTitle:@"Test 2" andBody:@"This is fun!" andImage:@"scribble2.png"];
    Scribble *scribble3 = [Scribble new];
    [scribble3 setTitle:@"Test 3" andBody:@"This is fun!" andImage:@"scribble3.png"];
    Scribble *scribble4 = [Scribble new];
    [scribble4 setTitle:@"Test 4" andBody:@"This is fun!" andImage:@"scribble.png"];
    Scribble *scribble5 = [Scribble new];
    [scribble5 setTitle:@"Test 5" andBody:@"This is fun!" andImage:@"scribble2.png"];
    Scribble *scribble6 = [Scribble new];
    [scribble6 setTitle:@"Test 6" andBody:@"This is fun!" andImage:@"scribble3.png"];
    Scribble *scribble7 = [Scribble new];
    [scribble7 setTitle:@"Test 7" andBody:@"This is fun!" andImage:@"scribble.png"];
    Scribble *scribble8 = [Scribble new];
    [scribble8 setTitle:@"Test 8" andBody:@"This is fun!" andImage:@"scribble3.png"];

    scribbles = [NSArray arrayWithObjects:
                 scribble1,scribble2,scribble3,scribble4,scribble5,scribble6,scribble7,scribble8, nil];
}

//To make the Selection disappear
- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    [self.tableView deselectRowAtIndexPath:[self.tableView indexPathForSelectedRow] animated:YES];

}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return scribbles.count;
}

//Loading stuff into tableView
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *simpleTableIdentifier = @"ScribbleCell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

    if (cell == nil){
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
    }

    Scribble *scribble = [scribbles objectAtIndex:indexPath.row];

    UIImageView *scribbleImageView = (UIImageView *)[cell viewWithTag:100];
    scribbleImageView.image = [UIImage imageNamed:scribble.image];
    scribbleImageView.layer.cornerRadius = 18.0;
    scribbleImageView.clipsToBounds = YES;

    UILabel *scribbleNameLabel = (UILabel *)[cell viewWithTag:101];
    scribbleNameLabel.text = scribble.title;

    UILabel *scribbleBodyLabel = (UILabel *)[cell viewWithTag:102];
    [scribbleBodyLabel setLineBreakMode:NSLineBreakByWordWrapping];
    scribbleBodyLabel.numberOfLines = 0;
    scribbleBodyLabel.text = scribble.body;
    [scribbleBodyLabel sizeToFit];
    return cell;
}

Answer 1

如果您正在使用原型单元格，则dequeueReusableCellWithIdentifier：每次返回一个单元格，前提是标识符正确。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *simpleTableIdentifier = @"ScribbleCell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

    Scribble *scribble = scribble[indexPath.row];

    UIImageView *scribbleImageView = (UIImageView *)[cell viewWithTag:100];
    scribbleImageView.image = [UIImage imageNamed:scribble.image];
    scribbleImageView.layer.cornerRadius = 18.0;
    scribbleImageView.clipsToBounds = YES;

    UILabel *scribbleNameLabel = (UILabel *)[cell viewWithTag:101];
    scribbleNameLabel.text = scribble.title;

    UILabel *scribbleBodyLabel = (UILabel *)[cell viewWithTag:102];
    [scribbleBodyLabel setLineBreakMode:NSLineBreakByWordWrapping];
    scribbleBodyLabel.numberOfLines = 0;
    scribbleBodyLabel.text = scribble.body;
    return cell;
}

    - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
    {
        Scribble *scribble = scribble[indexPath.row];

        NSString *scribbleBody = scribble.body;
        UIFont *cellFont = [UIFont systemFontOfSize:17.0f];
        /*Instead of hardcoded width you can find width from tableView frame 
        imageView and their offsets 20 for tableView ,40 for imageView, 30 for 
        offset of body label  */
        CGFloat width = tableView.frame.size.width - 90.0f;
        CGSize constraintSize = CGSizeMake(width, MAXFLOAT);
        CGSize labelSize = [scribbleBody sizeWithFont:cellFont
                                    constrainedToSize:constraintSize
                                        lineBreakMode:NSLineBreakByWordWrapping];

        //Add the height of scribbleNameLabel +offset
        return labelSize.height + 40.0f;
    }

Answer 2

您需要为heightForRowAtIndexPath使用委托方法UITableView，在这里您可以根据UITableViewCell的文字调整身高您可follow the thread，它可以帮助您解决问题

动态改变原型细胞的高度

2 个答案: