UILabel in a grouped table view's header doesn't wrap text - iphone

Question

I have a label whose text is longer that the table view's header containing it, so I want the label to be split into N lines according to the width available. This is my code:
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
if (section == 1) {
UIView *wrapper = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.tableView.frame.size.width, 100)];
[wrapper setBackgroundColor:[UIColor clearColor]];
UILabel *textLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, self.tableView.frame.size.width, 100)];
textLabel.text = NSLocalizedString(#"This is supposed to be a very long text that may fill several lines", #"");
[textLabel setLineBreakMode:UILineBreakModeWordWrap];
[textLabel setNumberOfLines:0];
[wrapper addSubview:textLabel];
return wrapper;
}
else
return nil;
}
However, the label is in a single line and I can't see the end of the text. What am I missing?
Thanks!

Answer 1

You should implement the delegate method heightForHeaderInSection.
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
if(section ==1)
return 100;
else
return 0;
}

Answer 2

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
if (section == 1) {
NSString *text = NSLocalizedString(#"This is supposed to be a very long text that may fill several lines", #"");;
CGSize size = [text sizeWithFont:[UIFont systemFontOfSize:10] constrainedToSize:CGSizeMake(self.tableView.frame.size.width, 999) lineBreakMode:NSLineBreakByWordWrapping];
CGRect frame = CGRectZero;
frame.size = size;
UIView *wrapper = [[UIView alloc] initWithFrame:frame];
[wrapper setBackgroundColor:[UIColor clearColor]];
UILabel *textLabel = [[UILabel alloc] initWithFrame:frame];
textLabel.text = NSLocalizedString(#"This is supposed to be a very long text that may fill several lines", #"");
[textLabel setLineBreakMode:UILineBreakModeWordWrap];
[textLabel setNumberOfLines:0];
[wrapper addSubview:textLabel];
return wrapper;
}
else
return nil;
}

Answer 3

use this if you want to support iOS below 6.0
textLabel.lineBreakMode = UILineBreakModeWordWrap;
textLabel.numberOfLines = 0;
As UILineBreakModeWordWrap deprecated now.
otherwise use this
textLabel.lineBreakMode = NSLineBreakByWordWrapping;
textLabel.numberOfLines = 0;

Answer 4

you should set size of label as text in heightForRowAtIndexPath
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
NSString *text;
CGSize textViewSize;
int width = 270;
textViewSize = [text sizeWithFont:[UIFont fontWithName:#"Helvetica Neue" size:14.0]
constrainedToSize:CGSizeMake(width, FLT_MAX)
lineBreakMode:UILineBreakModeCharacterWrap];
CGFloat height = MAX(textViewSize.height, 44.0f);
return height;
}
and in cellForRowAtIndexPath write this
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
textViewSize = [text sizeWithFont:[UIFont fontWithName:#"Helvetica Neue" size:14.0]
constrainedToSize:CGSizeMake(width, FLT_MAX)
lineBreakMode:UILineBreakModeCharacterWrap];
// / CGFloat height = MAX(textViewSize.height, 44.0f);
// if (!lblParameter){
// lblParameter = (UILabel*)[cell viewWithTag:1];}
CGFloat height = MAX(textViewSize.height, 44.0f);
[lblParameter setText:text];
[lblParameter setFont:[UIFont fontWithName:#"Helvetica Neue" size:14.0]];
[lblParameter setFrame:CGRectMake(10, 0,width,height)];
[[cell contentView] addSubview:lblParameter];
}

Answer 5

you need caculate the height of uilabel this height equal font size * numberline

Answer 6

It seems that wrapping / formatting will not work on a label inside the header view - presumably because it's inheriting defaults from somewhere. So, a simple solution, which AFAIK breaks no laws, is to put the label inside a view inside the header view.
Using the storyboard, drag a view to the table view controller (above your prototype cell).
Add a second view to this view.
Add the label to this second view. Make sure both views and label are tall enough to allow for multiple lines of text. In the label's attributes, set Lines to 0 and Line Breaks to Word Wrap.
Wrapping will now work as expected.