The style is reset when I change kerning. For example, when I change the text size or color, it is saved, but when I change kerning, the style UITextView is reset
#IBAction func sizeTextEdit(_ sender: Any) {
self.textOne?.font = UIFont.systemFont(ofSize: CGFloat(sizeText.value * 1))
}
#IBAction func kernTextEdit(_ sender: Any) {
let textString = textOne.text
let attrs: [NSAttributedString.Key : Any] = [.kern: kernText.value]
textOne?.attributedText = NSAttributedString(string: textString!, attributes: attrs)
}
As you can see in the first screenshot, I increased the font, then I increased the distance between the letters and the font size was reset
The font property only changes the font for the text property. The attributedText is a different property, so you need to define the font for it too:
let attrs: [NSAttributedString.Key : Any] = [.kern: kernText.value,
.font: UIFont.systemFont(ofSize: CGFloat(sizeText.value * 1))]
textOne?.attributedText = NSAttributedString(string: textString!, attributes: attrs)
On a side note, if you want to do a thing like this it's better to stick to one property, in this case attributedText, otherwise you have to keep them in sync.
Related
On the storyboard I created a text view. Inserted two paragraphs of text content inside textview. Selected custom attributes on the storyboard and made some words bold. When I run the simulator, everything is ok. But when I set the font size programmatically with respect to the "view.frame.height", the bold words which I set on the storyboard resets to regular words.
Code: "abcTextView.font = abcTextView.font?.withSize(self.view.frame.height * 0.021)"
I couldn't get past this issue. How can I solve this?
The problem is that you're working with an AttributedString. Take a look at Manmal's excellent answer here if you want more context, and an explanation of how the code works:
NSAttributedString, change the font overall BUT keep all other attributes?
Here's an easy application of the extension he provides, to put it in the context of your problem:
class ViewController: UIViewController {
#IBOutlet weak var myTextView: UITextView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
let newString = NSMutableAttributedString(attributedString: myTextView.attributedText)
newString.setFontFace(font: UIFont.systemFont(ofSize: self.view.frame.height * 0.033))
myTextView.attributedText = newString
}
}
extension NSMutableAttributedString {
func setFontFace(font: UIFont, color: UIColor? = nil) {
beginEditing()
self.enumerateAttribute(
.font,
in: NSRange(location: 0, length: self.length)
) { (value, range, stop) in
if let f = value as? UIFont,
let newFontDescriptor = f.fontDescriptor
.withFamily(font.familyName)
.withSymbolicTraits(f.fontDescriptor.symbolicTraits) {
let newFont = UIFont(
descriptor: newFontDescriptor,
size: font.pointSize
)
removeAttribute(.font, range: range)
addAttribute(.font, value: newFont, range: range)
if let color = color {
removeAttribute(
.foregroundColor,
range: range
)
addAttribute(
.foregroundColor,
value: color,
range: range
)
}
}
}
endEditing()
}
}
I am trying to create a custom NSTextBlock, much like the one Apple did at WWDC 18 (23 mins in).
Full demo project here.
Okay, so it works great when I'm editing and marking a paragraph with my paragraph style that has the text block attached.
But when I cut and paste it (or archive/unarchive from disk), it loses it. EDIT: It actually turns my TweetTextBlock subclass into a NSTableViewTextBlock, which also explains the borders.
Implementation
Here's a full Xcode project. Use the Format top menu item to trigger the markTweet function.
Here's how I add the attributes to the paragraph
#IBAction func markTweet(_ sender : Any?){
print("now we are marking")
let location = textView.selectedRange().location
guard let nsRange = textView.string.extractRange(by: .byParagraphs, at: location) else { print("Not in a paragraph"); return }
let substring = (textView.string as NSString).substring(with: nsRange)
let tweetParagraph = NSMutableParagraphStyle()
tweetParagraph.textBlocks = [TweetTextBlock()]
let twitterAttributes : [AttKey : Any] = [
AttKey.paragraphStyle : tweetParagraph,
AttKey.font : NSFont(name: "HelveticaNeue", size: 15)
]
textView.textStorage?.addAttributes(twitterAttributes, range: nsRange)
}
And this is my NSTextBlock subclass
import Cocoa
class TweetTextBlock: NSTextBlock {
override init() {
super.init()
setWidth(33.0, type: .absoluteValueType, for: .padding)
setWidth(70.0, type: .absoluteValueType, for: .padding, edge: .minX)
setValue(100, type: .absoluteValueType, for: .minimumHeight)
setValue(300, type: .absoluteValueType, for: .width)
setValue(590, type: .absoluteValueType, for: .maximumWidth)
backgroundColor = NSColor(white: 0.97, alpha: 1.0)
}
override func drawBackground(withFrame frameRect: NSRect, in controlView: NSView,
characterRange charRange: NSRange, layoutManager: NSLayoutManager) {
let frame = frameRect
let fo = frameRect.origin
super.drawBackground(withFrame: frame, in: controlView, characterRange:
charRange, layoutManager: layoutManager)
// draw string
let context = NSGraphicsContext.current
context?.shouldAntialias = true
let drawPoint: NSPoint = CGPoint(x: fo.x + 70, y: fo.y + 10)
let nameAttributes = [AttKey.font: NSFont(name: "HelveticaNeue-Bold", size: 15), .foregroundColor: NSColor.black]
var handleAttributes = [AttKey.font: NSFont(name: "HelveticaNeue", size: 15), .foregroundColor: NSColor(red: 0.3936756253, green: 0.4656872749, blue: 0.5323709249, alpha: 1)]
let nameAStr = NSMutableAttributedString(string: "Johanna Appleseed", attributes: nameAttributes)
let handleAStr = NSAttributedString(string: " #johappleseed · 3h", attributes: handleAttributes)
nameAStr.append(handleAStr)
nameAStr.draw(at: drawPoint)
let im = NSImage(named: "profile-twitter")!
im.draw(in: NSRect(x: fo.x + 10, y: fo.y + 10, width: 50, height: 50))
}
required init?(coder: NSCoder) {
super.init(coder: coder)
}
}
What I tried
My thinking is that this might happen because TextKit doesn't know how to archive the attributes from the custom block. But I tried overriding init:fromCoder and encode. They don't get called. Not on copy, paste, archiving, unarchiving. So I suppose that was not it. This leads me to think that all this custom drawing logic can't be saved in an attributed string, and that this is all happening in the layout manager. That makes sense. But how do I persist the block, then?
UPDATE: I tried reading the attributes. It has a paragraph style, and that paragraph style has an item in the textBlocks array property. But that text block is an NSTextBlock and not my subclass (i tried if block is TweetTextBlock which returns false)
UPDATE 2: I tried overriding properties like classForArchiver, and then reading them with e.g. print("twb: Class for archiver", block.classForArchiver). What's interesting here is that the text block has been turned into a NSTextTableBlock! I'm so deep in hacking this now that I'm looking for a way to store the className somewhere in the text block. So far, the only one I can think of is the tooltip property, but that's visible to the user, and I might want to use that for something else.
UPDATE 3: The tooltip is also not preserved. That's weird. The next big hack I can think of is setting the text color to HSB (n, 0, 0), where n is the identifier for the NSTextBlock subclass. Let's hope I don't have to go there.
UPDATE 4. This is most likely caused by both archiving and copy/pasting transforms the string into RTF. Here's public.rtf from my clipboard
{\rtf1\ansi\ansicpg1252\cocoartf2509
\cocoatextscaling0\cocoaplatform0{\fonttbl\f0\fnil\fcharset0 HelveticaNeue;}
{\colortbl;\red255\green255\blue255;\red245\green245\blue245;}
{\*\expandedcolortbl;;\csgray\c97000;}
\pard\intbl\itap1\tx560\tx1120\tx1680\tx2240\tx2800\tx3360\tx3920\tx4480\tx5040\tx5600\tx6160\tx6720\pardirnatural\partightenfactor0
\f0\fs30 \cf0 THIS text is in a TweetTextBlock}
It appears the NSAttributedString is somehow at fault. I tried subclassing NSMutableParagraphStyle and using it and it is NOT being encoded or decoded (init).
It may be possible to simply annotate the text run with a custom Attribute.Key indicating the delineation of the block content and its "type" and then post-process the AttributedString after the paste.
Alternatively, the out-of-the-box Pasteboard types may not support and archived NSAttributedString. Rather, (and I'm guessing) the highest fidelity text type may be RTF which may account for the fact that the TextBlock NSCoding methods aren't invoked at all.
Looking at NSPasteboard.PasteboardType my vote is option 2.
I have an attributedString and want to change only it's fontsize. To do that, I use another method that I found on StackOverflow. For most cases, this is working, but somehow it doesn't change the whole attributedString in one case.
Method to change the size:
/**
*A struct with static methods that can be useful for your GUI
*/
struct GuiUtils {
static func setAttributedStringToSize(attributedString: NSAttributedString, size: CGFloat) -> NSMutableAttributedString {
let mus = NSMutableAttributedString(attributedString: attributedString)
mus.enumerateAttribute(.font, in: NSRange(location: 0, length: mus.string.count)) { (value, range, stop) in
if let oldFont = value as? UIFont {
let newFont = oldFont.withSize(size)
mus.addAttribute(.font, value: newFont, range: range)
}
}
return mus
}
}
Working:
label.attributedText = GuiUtils.setAttributedStringToSize(attributedString: attributedString, size: fontSize)
Not working:
mutableAttributedString.replaceCharacters(in: gapRange, with: filledGap)
label.attributedText = GuiUtils.setAttributedStringToSize(attributedString: mutableAttributedString.replaceCharacters, size: fontSize)
Somehow, the replaced text does not change its size.
Excuse me, but do you sure that your filledGap attributed string has font attribute? Because if it doesn't – this part will not be handled by the enumerateAttribute block.
In this case your fix will be just to set any font to the whole filledGap string, to be sure that it's part will be handled by the enumerateAttribute block.
How can I change the color of all text in a NSTextView? In the example below, myTextView.textColor = .white only changes color of Hello but not World. I don't want to specify the color every time when I append some text.
Also I'm not sure if this is an appropriate way appending text to NSTextView.
override func viewDidLoad() {
super.viewDidLoad()
myTextView.string = "Hello"
myTextView.backgroundColor = .black
myTextView.textColor = .white
logTextView.textStorage?.append(NSAttributedString(string: "World"))
}
NSTextStorage is a subclass of NSMutableAttributedString so you can manipulate it as a mutable attributed string.
If you want the new text to carry on the attributes at the end of the current text, append to the mutable string:
myTextView.textStorage?.mutableString.append("World")
If you want to add more attributes to the new text (for example, adding an underline), get the attributes at the end of the current text and manipulate the attributes dictionary:
guard let textStorage = myTextView.textStorage else {
return
}
var attributes = textStorage.attributes(at: textStorage.length - 1, effectiveRange: nil)
attributes[.underlineStyle] = NSNumber(value: NSUnderlineStyle.styleSingle.rawValue)
textStorage.append(NSAttributedString(string: "World", attributes: attributes))
After this, if you call mutableString.append, the new text will be in white and underlined.
I've been creating a MacOS app and am having trouble styling the font of an NSSearchField (named searchField). My code so far is as follows:
Declared at top of single main viewController class:
let normalTextStyle = NSFont(name: "PT Mono", size: 14.0)
let backgroundColour = NSColor(calibratedHue: 0.6,
saturation: 0.5,
brightness: 0.2,
alpha: 1.0)
let normalTextColour = NSColor(calibratedHue: 0.5,
saturation: 0.1,
brightness: 0.9,
alpha: 1.0)
Declared in viewDidLoad:
searchField.backgroundColor = backgroundColour
searchField.textColor = normalTextColour
searchField.font = normalTextStyle
searchField.centersPlaceholder = false
searchField.currentEditor()?.font = normalTextStyle
let attrStr = NSMutableAttributedString(string: "Search...",
attributes: [NSForegroundColorAttributeName: normalTextColour])
searchField.placeholderAttributedString = attrStr
Generally this works except in one condition: when the search field has focus but no search term has been entered. In this case the placeholder text has the correct colour but the font seems to return to the default (Helvetica 12 point?). As soon as something is typed in or the field loses focus, then the correct font is used once more.
I have tried with no luck looking through the Apple docs for some kind of font or colour settings not currently being set. I have fiddled about with all the font setting I could find in the interface builder, including cocoa bindings and the normal settings in the inspector.
Do I need to set some value of the currentEditor? I am guessing not because the font is changed once text is entered.. I am stuck - can anyone help?
EDIT: I've now tried with an NSTextField and the results are the same. Does anyone have any ideas?
I eventually managed to find an answer. I created a new class TitleTextFormatter of type Formatter, which is 'is intended for subclassing. A custom formatter can restrict the input and enhance the display of data in novel ways'. All I needed to do was override certain default functions to get what I needed:
import Cocoa
class TitleTextFormatter: Formatter {
override func string(for obj: Any?) -> String? {
/*
* this function receives the object it is attached to.
* in my case it only ever receives an NSConcreteAttributedString
* and returns a plain string to be formatted by other functions
*/
var result: String? = nil
if let attrStr = obj as? NSAttributedString {
result = attrStr.string
}
return result
}
override func getObjectValue( _ obj: AutoreleasingUnsafeMutablePointer<AnyObject?>?,
for string: String,
errorDescription error: AutoreleasingUnsafeMutablePointer<NSString?>?) -> Bool {
/*
* this function in general is overridden to provide an object created
* from the input string. in this instance, all I want is an attributed string
*/
let titleParagraphStyle = NSMutableParagraphStyle()
titleParagraphStyle.alignment = .center
let titleAttributes = [NSAttributedStringKey.foregroundColor: NSColor.mainText,
NSAttributedStringKey.font: NSFont.titleText,
NSAttributedStringKey.paragraphStyle: titleParagraphStyle]
let titleAttrStr = NSMutableAttributedString(string: string,
attributes: titleAttributes)
obj?.pointee = titleAttrStr
return true
}
override func attributedString(for obj: Any,
withDefaultAttributes attrs: [NSAttributedStringKey : Any]? = nil) -> NSAttributedString? {
/*
* is overridden to show that an attributed string is created from the
* formatted object. this happens to duplicate what the previous function
* does, only because the object I want to create from string is an
* attributed string
*/
var titleAttrStr: NSMutableAttributedString?
if let str = string(for: obj) {
let titleParagraphStyle = NSMutableParagraphStyle()
titleParagraphStyle.alignment = .center
let titleAttributes = [NSAttributedStringKey.foregroundColor: NSColor.mainText,
NSAttributedStringKey.font: NSFont.titleText,
NSAttributedStringKey.paragraphStyle: titleParagraphStyle]
titleAttrStr = NSMutableAttributedString(string: str,
attributes: titleAttributes)
}
return titleAttrStr
}
}
and then in viewDidLoad I added the following:
let titleTextFormatter = TitleTextFormatter()
titleTextField.formatter = titleTextFormatter