Is there a property that will apply the proper character spacing to have all the text on each line in an NSAttributedString butt up against the bounds like in a book, (including the final line which I know isn't done in books)? I know kerning can be adjusted, but that won't dynamically adjust on a per line basis. Any help would be appreciated. Also NSTextAlignmentJustified and NSTextAlignmentNatural get close, but won't apply the effect to the last line of text.
The only option is to use NSTextAlignmentJustified. Last line is never justified, because NSTextAlignmentJustified refers to Left Justification mode, as it is the standard case.
For more information you can take a look at Typographic Alignment on wikipedia : http://en.wikipedia.org/wiki/Typographic_alignment
Related
I am trying to draw an NSAttributedString (actually, a constructed NSMutableAttributedString) where the "original" text has been struck and replacement text inserted above it (I'm trying to replicate the look/feel of an Ancient Greek manuscript).
My technique is a combination of NSBaselineOffsetAttributeName with NSKernAttributeName, but it appears that using a negative value for NSKernAttributeName "wipes away" the strikethrough of the text, even if the characters don't overlap.
If I put an extra space after the "A" character (in the original text), the "A" gets the strikethrough, but the "EI" is also offset to the right. So, it appears that the offset/kerning of the "EI" text affects how much of the strikethrough actually occurs.
Here's what I'd like to reproduce (I don't care about the angle; it's not about a picture-perfect reproduction; just the gist):
Here's what is currently happening:
This is when I add an extra space after the strikethrough:
So, the only other thing I can think of would be to render a separate NSAttributedString in the correct place, separate from the current one, but I have no idea how to calculate the location of a specific character in an NSAttributedString when it's drawn. I'm drawing to a PDF, not to any on-screen control like a UILabel. Alternatively, I could draw the "strikethrough" myself as a line, but that seems to still require knowing the coordinates for the text in question, which is calculated on-the-fly, and I hope to use this method to reproduce a large sample of ancient texts, which means doing it by hand just isn't a good answer here.
Anything I'm missing, or any out-of-the-box ideas to try?
For example, I have the following two string: "How Munched is That Birdie in the Window?" and "S22 - E7". I want to present in the label the following: "How Munched is That Birdie in ... S22 - E7" If the string is too large according to the label's size and doesn't fit it". How you can see, the three dots are placed always in the first string, the second string is always shown full.
How can I achieve this?
Here is how to do it.
yourlabel.adjustsFontSizeToFitWidth = false
yourlabel.lineBreakMode = .byTruncatingMiddle
You can set the UILabel's ParagraphStyle LineBreakMode to byTruncatingMiddle, which will probably work in most cases with carefully planned label size. From the docs:
The line is displayed so that the beginning and end fit in the container and the missing text in the middle is indicated by an ellipsis glyph. This mode is used for single-line layout
If you want to guarantee none of the "S22 - E7" string is truncated, you would have more control using two labels and setting layout constraints such that the width of the protected label is preserved so that it can display the full string whenever possible, but that is probably overkill in most cases.
You may also find this answer helpful if decide to go a different route by manually manipulating the displayed string based on detecting how many characters will be visible given the width and font.
I need to show a body of text similar to the one shown below and limited to the red non-rectangular area. Rob's answer to this question pretty much answers my question as well, but I also need to truncate at tail of the paragraph when the text is too long.
Extra question: is it also possible to set minimum font size similar to UILabel?
Try using NSString::sizeWithFont:constrainedToSize method which is documented here. You can specify the fontsize and maximum size for the text.
You can also calculate the minimum font size using NSString::sizeWithFont:minFontSize:actualFontSize:forWidth:lineBreakMode: method.
I'm working on an app where I need all lines of text to be Justified alignment. The app will display 2 lines of text over the top of an image, creating an Advert like feeling to the picture. The problem is that both these lines of text need to be justified, but the 2nd line of text will never be justified. Or if I draw both lines separately then neither will be justified.
If you specify kCTJustifiedTextAlignment in CoreText or NSJustifiedTextAlignment on NSTextField/View all but the last line of text are justified. The last line is aligned naturally.
Is there a way to force the final line of a textfield or textview to be justified, so fill the width of the view?
I've thought about using CTLine to draw each line separately, and specifying something on those to make all of them justified, but I'm not sure how to go about that either.
Thanks
Thanks to omz's comment I stumbled across CTLineCreateJustifiedLine, which gives me just what I wanted. I'd still be interested if someone has a solution using a Cocoa Control (NSTextView), but i'd be surprised if there was anything tbh.
CTLineRef line = CTLineCreateWithAttributedString((__bridge CFAttributedStringRef)attString);
line = CTLineCreateJustifiedLine(line, 1.0, dirtyRect.size.width);
CTLineDraw(line, context);
CFRelease(line);
I have seen here people needing to calculate the size of the NSString given a size but I need to do the opposite.
Given a specified rect (or fixed UITextView, or multiline UILabel, no scrolling) I need to know:
if it managed to show all the chars of my NSString
if not, what is the last char shown
So that I can display the remaining text in another UITextView (of course if I could use a single UITextView I would not have this problem).
At first it seems a simple thing to do, but actually I am not finding a way, intuitively I think I could use either UITextView's:
textView.contentSize.height;
or NSString's:
sizeWithFont:constrainedToSize:lineBreakMode:
or a combination of the two, but I need to be precise and those methods do not help me in telling what is the last character that managed to fit the visible area of the UITextView.
Not sure if this is actually possible, but is a requirement of my client who thinks programming iOS is like printing a newspaper and expects to be able to format text around an image....
You could maybe get the maximum height of one line of text from a one character long string.
If you use that with sizeWithFont:constrainedToSize:lineBreakMode: then you should be able to know if your text runs onto more than one line (if the cgsize height is greater than the height of one line of text).
In order to find out the last character (or word) you would have to loop around the length of the string adding characters (or words) as you go and checking for when the cgsize height increases to add a new line, this will give you the character point when to split into multiple strings ( for multiple fields/labels/textviews ) or when to insert line breaks into the text ( if using a single multi-line textview or label ).
I hope you find an easier way...