How to calculate width of multiple lines of UITextview?

Question

I have a UITextView that has a maximum number of four lines. I want to put UILabels behind each line, covering only however much text there is for the respective line.

So do any of you fine coders have any ideas as to how I would calculate each line's width?

Answer 1

try this one

UIFont *font=[UIFont systemFontOfSize:17.0f];

UILabel *yourLabel=[[UILabel alloc] initWithFrame:CGRectMake(0, 0, 200, 80)];
yourLabel.numberOfLines=4;
yourLabel.text=@"Hello\nHulo\nMe\nyou";

CGSize labelSize = [yourLabel.text sizeWithFont:font
                              constrainedToSize:yourLabel.frame.size
                                  lineBreakMode:NSLineBreakByTruncatingTail];
CGFloat singleLineHeight = labelSize.height/yourLabel.numberOfLines;


[self.view addSubview:yourLabel];

A single line height will be about 21.

NSLog(@"single line height is %f",singleLineHeight);

For text View follow this code

UITextView *yourView=[[UITextView alloc] initWithFrame:CGRectMake(0, 0, 100, 20)];
yourView.font=[UIFont systemFontOfSize:14.0f];
yourView.text    = @"Hello \nmy\n Friend\n Hru? ";

CGSize textViewSize = [yourView.text sizeWithFont:yourView.font
                       constrainedToSize:CGSizeMake(yourView.frame.size.width, FLT_MAX)
                           lineBreakMode:NSLineBreakByTruncatingTail];

[yourView setFrame:CGRectMake(0, 0, textViewSize.width, textViewSize.height)];

[self.view addSubview:yourView];

NSLog(@"single line height is %f",yourView.frame.size.height);