사용자 정의 셀없이 UITableViewCell에서 텍스트를 줄 바꿈하는 방법

사용자 정의 셀없이 UITableViewCell에서 텍스트를 줄 바꿈하는 방법

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이것은 iPhone 0S 2.0에 있습니다. 2.1에 대한 답변도 훌륭하지만 테이블과 관련된 차이점을 알지 못합니다.

은 기본적으로 UITableViewCell포함되어 있기 때문에 사용자 정의 셀을 만들지 않고 텍스트를 줄 바꿈 할 수 있어야합니다 UILabel. 맞춤 셀을 만들면 작동 할 수 있지만 이것이 달성하려는 것이 아닙니다. 현재 접근 방식이 작동하지 않는 이유를 이해하고 싶습니다.

셀이 텍스트 및 이미지 액세스를 지원하므로 필요할 때까지 데이터보기를 만들지 않기 때문에 필요에 따라 레이블이 생성된다는 것을 알았습니다. 따라서 다음과 같이하면 :

cell.text = @""; // create the label
UILabel* label = (UILabel*)[[cell.contentView subviews] objectAtIndex:0];

유효한 레이블이 있지만 numberOfLines그 (및 lineBreakMode) 설정이 작동하지 않습니다. 여전히 한 줄 텍스트가 나타납니다. UILabel텍스트가 표시되는 높이가 충분합니다. 높이 의 큰 값을 반환합니다 heightForRowAtIndexPath.

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다음은 더 간단한 방법이며 나를 위해 작동합니다.

당신의 cellForRowAtIndexPath:기능 안에서 . 셀을 처음 만들 때 :

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
    cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    cell.textLabel.lineBreakMode = UILineBreakModeWordWrap;
    cell.textLabel.numberOfLines = 0;
    cell.textLabel.font = [UIFont fontWithName:@"Helvetica" size:17.0];
}

레이블의 줄 수를 0으로 설정했습니다. 그러면 필요한만큼 줄을 사용할 수 있습니다.

다음 부분은 얼마나 큰지를 지정하는 UITableViewCell것입니다. heightForRowAtIndexPath함수 에서 그렇게하십시오 .

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSString *cellText = @"Go get some text for your cell.";
    UIFont *cellFont = [UIFont fontWithName:@"Helvetica" size:17.0];
    CGSize constraintSize = CGSizeMake(280.0f, MAXFLOAT);
    CGSize labelSize = [cellText sizeWithFont:cellFont constrainedToSize:constraintSize lineBreakMode:UILineBreakModeWordWrap];

    return labelSize.height + 20;
}

텍스트 주위에 작은 버퍼가 있기 때문에 반환 된 셀 높이에 20을 추가했습니다.

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iOS7에 대한 Tim Rupe의 답변을 업데이트했습니다.

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] ;
    cell.textLabel.lineBreakMode = NSLineBreakByWordWrapping;
    cell.textLabel.numberOfLines = 0;
    cell.textLabel.font = [UIFont fontWithName:@"Helvetica" size:17.0];
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSString *cellText = @"Go get some text for your cell.";
    UIFont *cellFont = [UIFont fontWithName:@"Helvetica" size:17.0];

    NSAttributedString *attributedText =
        [[NSAttributedString alloc]
            initWithString:cellText
            attributes:@
            {
                NSFontAttributeName: cellFont
            }];
    CGRect rect = [attributedText boundingRectWithSize:CGSizeMake(tableView.bounds.size.width, CGFLOAT_MAX)
                                               options:NSStringDrawingUsesLineFragmentOrigin
                                               context:nil];
    return rect.size.height + 20;
}

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A brief comment / answer to record my experience when I had the same problem. Despite using the code examples, the table view cell height was adjusting, but the label inside the cell was still not adjusting correctly - solution was that I was loading my cell from a custom NIB file, which happens after the cell height in adjusted.

And I had my settings inside the NIB file to not wrap text, and only have 1 line for the label; the NIB file settings were overriding the settings I adjusted inside the code.

The lesson I took was to make sure to always bear in mind what the state of the objects are at each point in time - they might not have been created yet! ... hth someone down the line.

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If we are to add only text in UITableView cell, we need only two delegates to work with (no need to add extra UILabels)

1) cellForRowAtIndexPath

2) heightForRowAtIndexPath

This solution worked for me:-

-(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];
    }

    cell.textLabel.font = [UIFont fontWithName:@"Helvetica" size:16];
    cell.textLabel.lineBreakMode = UILineBreakModeWordWrap;
    cell.textLabel.numberOfLines = 0;

    [cell setSelectionStyle:UITableViewCellSelectionStyleGray]; 
    cell.textLabel.text = [mutArr objectAtIndex:indexPath.section];
    NSLog(@"%@",cell.textLabel.text);

    cell.accessoryView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"arrow.png" ]];

    return cell;

}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{  
    CGSize labelSize = CGSizeMake(200.0, 20.0);

    NSString *strTemp = [mutArr objectAtIndex:indexPath.section];

    if ([strTemp length] > 0)
        labelSize = [strTemp sizeWithFont: [UIFont boldSystemFontOfSize: 14.0] constrainedToSize: CGSizeMake(labelSize.width, 1000) lineBreakMode: UILineBreakModeWordWrap];

    return (labelSize.height + 10);
}

Here the string mutArr is a mutable array from which i am getting my data.

EDIT :- Here is the array which I took.

mutArr= [[NSMutableArray alloc] init];

[mutArr addObject:@"HEMAN"];
[mutArr addObject:@"SUPERMAN"];
[mutArr addObject:@"Is SUPERMAN powerful than HEMAN"];
[mutArr addObject:@"Well, if HEMAN is weaker than SUPERMAN, both are friends and we will never get to know who is more powerful than whom because they will never have a fight among them"];
[mutArr addObject:@"Where are BATMAN and SPIDERMAN"];

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Now the tableviews can have self-sizing cells. Set the table view up as follows

tableView.estimatedRowHeight = 85.0 //use an appropriate estimate tableView.rowHeight = UITableViewAutomaticDimension

Apple Reference

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I use the following solutions.

The data is provided separately in a member:

-(NSString *)getHeaderData:(int)theSection {
    ...
    return rowText;
}

The handling can be easily done in cellForRowAtIndexPath. Define the cell / define the font and assign these values to the result "cell". Note that the numberoflines is set to "0", which means take what is needed.

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

    UIFont *cellFont = [UIFont fontWithName:@"Verdana" size:12.0];
    cell.textLabel.text= [self getRowData:indexPath.section];
    cell.textLabel.font = cellFont;
    cell.textLabel.numberOfLines=0;
    return cell;
}

In heightForRowAtIndexPath, I calculate the heights of the wrapped text. The boding size shall be related to the width of your cell. For iPad this shall be 1024. For iPhone en iPod 320.

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UIFont *cellFont = [UIFont fontWithName:@"Verdana" size:12.0];
    CGSize boundingSize = CGSizeMake(1024, CGFLOAT_MAX);
    CGSize requiredSize = [[self getRowData:indexPath.section] sizeWithFont:cellFont constrainedToSize:boundingSize lineBreakMode:UILineBreakModeWordWrap];
    return requiredSize.height;    
}

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I found this to be quite simple and straightForward :

[self.tableView setRowHeight:whatEvereight.0f];

for e.g. :

[self.tableView setRowHeight:80.0f];

This may or may not be the best / standard approach to do so, but it worked in my case.

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Try my code in swift . This code will work for normal UILabels also.

extension UILabel {
    func lblFunction() {
        //You can pass here all UILabel properties like Font, colour etc....
        numberOfLines = 0
        lineBreakMode = .byWordWrapping//If you want word wraping
        lineBreakMode = .byCharWrapping//If you want character wraping
    }
}

Now call simply like this

cell.textLabel.lblFunction()//Replace your label name 

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I think this is a better and shorter solution. Just format the UILabel (textLabel) of the cell to auto calculate for the height by specifying sizeToFit and everything should be fine.

- (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];
    }

    // Configure the cell...
    cell.textLabel.text = @"Whatever text you want to put here is ok";
    cell.textLabel.lineBreakMode = UILineBreakModeWordWrap;
    cell.textLabel.numberOfLines = 0;
    [cell.textLabel sizeToFit];

    return cell;
}

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I don't think you can manipulate a base UITableViewCell's private UILabel to do this. You could add a new UILabel to the cell yourself and use numberOfLines with sizeToFit to size it appropriately. Something like:

UILabel* label = [[UILabel alloc] initWithFrame:cell.frame];
label.numberOfLines = <...an appriate number of lines...>
label.text = <...your text...>
[label sizeToFit];
[cell addSubview:label];
[label release];

참고URL : https://stackoverflow.com/questions/129502/how-do-i-wrap-text-in-a-uitableviewcell-without-a-custom-cell