nslayoutmanager

The problem: UITextView silently changes it's contentSize in some situations. The simplest case textView with large text and keyboard. Just add UITextView outlet and set - viewDidLoad as: - (void)viewDidLoad { [super viewDidLoad]; // expand default "Lorem..." _textView.text = [NSString stringWithFormat:@"1%@\n\n2%@\n\n3%@\n\n4%@\n\n5", _textView.text, _textView.text, _textView.text, _textView.text]; _textView.keyboardDismissMode = UIScrollViewKeyboardDismissModeInteractive; _textView.contentInset = UIEdgeInsetsMake(0, 0, 216, 0); } Now showing and hiding keyboard will cause text jumps in some

I have a UIImage that contains multiple image frames and a duration which was sliced together from an animated GIF file. If I load the image in a UIWebView it will animate as expected, but I want to use a UITextView instead. The obvious choice is to use TextKit with a custom NSLayoutManger and many custom NSAttributedString attributes to achieve various drawing effects. I have a single UITextView that I'd like to give a NSAttributedString that contains NSTextAttachment s for all of the images I need to display inline. It's working fine except for when I load one of these animated UIImages ,

I've been creating UITextView s programatically, using auto layout, in iOS 7. Something like this: _textView = [UITextView new]; _textView.translatesAutoresizingMaskIntoConstraints = NO; _textView.font = [UIFont systemFontOfSize:18.0]; _textView.delegate = self; [self.view addSubview:_textView]; In addition to the other constraints I've created, I have this one for the bottom of the text view: _textViewBottomConstraint = [NSLayoutConstraint constraintWithItem:_textView attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:self.bottomLayoutGuide attribute:NSLayoutAttributeTop

Using Swift, I want to get the boundingRect of a glyph, in draw#rect in a UILabel, the UILabel already has a size (say 300x300 in the example) and qualities such as the text being centered. class RNDLabel: UILabel { override func draw(_ rect: CGRect) { let manager = NSLayoutManager() let store = NSTextStorage(attributedString: NSAttributedString( string: text!, attributes: [NSAttributedString.Key.font: font])) store.addLayoutManager(manager) let textContainer = NSTextContainer(size: rect.size) // note, intrinsicContentSize is identical there, no difference manager.addTextContainer

I'm trying to draw text using Core Text functions, with a line spacing that's as close as possible to what it would be if I used NSTextView. Take this font as an example: NSFont *font = [NSFont fontWithName:@"Times New Roman" size:96.0]; The line height of this font, if I would use it in an NSTextView is 111.0. NSLayoutManager *lm = [[NSLayoutManager alloc] init]; NSLog(@"%f", [lm defaultLineHeightForFont:font]); // this is 111.0 Now, if I do the same thing with Core Text, the result is 110.4 (assuming you can calculate the line height by adding the ascent, descent and leading). CTFontRef

Since Xcode 6 still has a lots of bugs with Swift, I'm not sure is it one or I'm missing something. My class adopts protocol NSLayoutManagerDelegate. But it seems impossible to override method I need. I do as documentation describes: override func layoutManager(_ aLayoutManager: NSLayoutManager!, didCompleteLayoutForTextContainer aTextContainer: NSTextContainer!, atEnd flag: Bool) { } But I get error here: method does not override any method from its superclass. What should I do? You're implementing a method from the protocol, yes, but it's not an override. Just remove the override keyword. An