I get different line height in textView with using same font
How to set fixed line height?
I have done a lot of attempts, any help is appreciated, thanks
set NSMutableParagraphStyle lineSpacing is useless
set lineHeightMultiple is to make the difference more obvious
[
demo
import UIKit
import PlaygroundSupport
let view = UIView(frame: CGRect(x: 0, y: 0, width: 400, height: 1000))
let data: [String] = [
"商品名称: 巧克力",
"商品名称: 巧克力",
"商品名称: 巧克力",
"注册未成功，请验证电子邮件",
"注册未成功，请验证电子邮件",
"注册未成功，请验证电子邮件",
"测试文字, 测试文字，测试文字",
"测试文字, 测试文字，测试文字",
"测试文字, 测试文字，测试文字",
]
let textView = UITextView(frame: view.frame)
let paragraphStyle = NSMutableParagraphStyle()
let bodyFont = UIFont.systemFont(ofSize: 20.0)
paragraphStyle.lineHeightMultiple = 4
var stripe = false
// attributedString
let mutableAttributedString = NSMutableAttributedString(string: "Test TextViewAttributedString\n", attributes: [
NSFontAttributeName: UIFont.systemFont(ofSize: 18.0)
])
for text: String in data {
var backgroundColor = UIColor(red:0.13, green:0.38, blue:0.95, alpha:1.00)
if stripe {
backgroundColor = UIColor(red:0.92, green:0.12, blue:0.38, alpha:1.00)
}
let contentAttributedString = NSAttributedString(string: text, attributes: [
NSBackgroundColorAttributeName: backgroundColor,
NSParagraphStyleAttributeName: paragraphStyle,
NSFontAttributeName: bodyFont
])
mutableAttributedString.append(contentAttributedString)
stripe = !stripe
// add newline character
let newlineAttributedString = NSAttributedString(string: "\n")
mutableAttributedString.append(newlineAttributedString)
}
textView.attributedText = mutableAttributedString
view.addSubview(textView)
PlaygroundPage.current.liveView = view
I found the reason, the newlineAttributedString also need NSFontAttributeName
let newlineAttributedString = NSAttributedString(string: "\n", attributes: [
NSFontAttributeName: bodyFont
])
mutableAttributedString.appendAttributedString(newlineAttributedString)
Related
I have a UILabel that incorporates two different strings/font via attributed text.
I would like to incorporate an alpha on the attrs2 of the UILabel. But leave the first part of the string with no alpha.
Code:
private let titleLabel: UILabel = {
let label = UILabel()
label.textColor = .black
label.textAlignment = .center
let attrs1 = [NSAttributedString.Key.font : UIFont(name:"SFMono-Bold", size: 20)]
let attrs2 = [NSAttributedString.Key.font : UIFont.sfMonoMedium(ofSize: 20)]
let attributedString1 = NSMutableAttributedString(string:"Fast credit card\n payments", attributes:attrs1 as [NSAttributedString.Key : Any])
let attributedString2 = NSMutableAttributedString(string:" using Square.", attributes:attrs2 as [NSAttributedString.Key : Any])
attributedString1.append(attributedString2)
label.attributedText = attributedString1
return label
}()
Pseudo:
let attrs2 = [NSAttributedString.Key.font : UIFont.sfMonoMedium(ofSize: 20), NSAttributedString.Key.font.alpha..... : 0.75]
or
attrs2.alpha = 0.75
You can do that with the .foregroundColor attribute.
let attrs2: [NSAttributedString.Key: Any] = [
.font : UIFont.sfMonoMedium(ofSize: 20),
.foregroundColor: UIColor.black.withAlphaComponent(0.5),
]
I want my UILabel to be able to split a long name into two lines and add the hyphen. Currently my code is like so :
let usernameX = profilePhoto.frame.size.width+horizontalMargin
let username = UILabel(frame: CGRect(x: usernameX, y: (self.frame.size.height/2)-21, width: self.frame.size.width-usernameX-horizontalMargin, height: 42))
username.adjustsFontSizeToFitWidth = true
username.font = UIFont(name: "SFUIDisplay-Regular", size: 20)
username.minimumScaleFactor = 0.8
username.numberOfLines = 2
username.translatesAutoresizingMaskIntoConstraints = false
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.hyphenationFactor = 0.5
let attributedString = NSMutableAttributedString(string: "Areallylongname", attributes: [NSParagraphStyleAttributeName: paragraphStyle])
However the label is only displaying "Areally-". What am I doing wrong here?
You can re-check the height of superview of label.
Fixing 42 as height is not the correct way to do it. You can calculate height of the label required dynamically and assign it. You can do it following way.
let attributedString = NSMutableAttributedString(string: "Areallylongname", attributes: [NSParagraphStyleAttributeName: paragraphStyle, NSFontAttributeName : UIFont(name: "SFUIDisplay-Regular", size: 20)])
var newFrame = attributedString.boundingRectWithSize(CGSizeMake(username.frame.size.width, 9999), options: NSStringDrawingOptions.UsesLineFragmentOrigin , context: nil)
newFrame.origin.x = username.frame.origin.x
newFrame.origin.y = username.frame.origin.y
You can set the new frame in viewDidLayoutSubviews
Going through some basic improvements to a application I am working on. Still new to the iOS swift development scene. I figured that the lines of text in my code would automatically be centered because I set the label to center. After a little bit of research I discovered this is not the case. How would I align code like this to center:
let atrString = try NSAttributedString(
data: assetDetails!.cardDescription.dataUsingEncoding(NSUTF8StringEncoding)!,
options: [NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType],
documentAttributes: nil)
assetDescription.attributedText = atrString
You need to create a paragraph style specifying center alignment, and set that paragraph style as an attribute on your text. Example playground:
import UIKit
import PlaygroundSupport
let style = NSMutableParagraphStyle()
style.alignment = NSTextAlignment.center
let richText = NSMutableAttributedString(string: "Going through some basic improvements to a application I am working on. Still new to the iOS swift development scene. I figured that the lines of text in my code would automatically be centered because I set the label to center.",
attributes: [ NSParagraphStyleAttributeName: style ])
// In Swift 4, use `.paragraphStyle` instead of `NSParagraphStyleAttributeName`.
let label = UILabel(frame: CGRect(x: 0, y: 0, width: 200, height: 400))
label.backgroundColor = UIColor.white
label.attributedText = richText
label.numberOfLines = 0
PlaygroundPage.current.liveView = label
Result:
Since you're parsing an HTML document to create your attributed string, you'll need to add the attribute after creation, like this:
let style = NSMutableParagraphStyle()
style.alignment = NSTextAlignment.center
let richText = try NSMutableAttributedString(
data: assetDetails!.cardDescription.data(using: String.Encoding.utf8)!,
options: [NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType],
documentAttributes: nil)
richText.addAttributes([ NSParagraphStyleAttributeName: style ],
range: NSMakeRange(0, richText.length))
// In Swift 4, use `.paragraphStyle` instead of `NSParagraphStyleAttributeName`.
assetDescription.attributedText = richText
Update for Swift 4
In Swift 4, attribute names are now of type NSAttributeStringKey and the standard attribute names are static members of that type. So you can add the attribute like this:
richText.addAttribute(.paragraphStyle, value: style, range: NSMakeRange(0, richText.length))
In Swift 4.1 :
let style = NSMutableParagraphStyle()
style.alignment = NSTextAlignment.center
lbl.centerAttributedText = NSAttributedString(string: "Total Balance",attributes: [.paragraphStyle: style])
(edited for code block)
You can use this utility function to do all common configuration for label
#discardableResult
public func DULabel(text: String, frame: CGRect = .zero, parent:UIView? = nil , font:UIFont, textColor:UIColor = .black, numOfLines:Int = 0 ,textAlignment: NSTextAlignment = .center,lineSpaceing:CGFloat = 0, cb: ((UILabel)->Void)? = nil )-> UILabel! {
let label = UILabel()
label.frame = frame
label.font = font
label.textColor = textColor
label.textAlignment = textAlignment
label.numberOfLines = numOfLines
if( lineSpaceing == 0 ){
label.text = text
}
else {
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = lineSpaceing
paragraphStyle.alignment = textAlignment
let attrString = NSMutableAttributedString(string: text)
attrString.addAttribute(.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attrString.length))
label.attributedText = attrString
}
if let parent = parent {
parent.addSubview(label)
}
cb?(label)
return label
}
Does anyone know how to achieve two different text alignments in one string?
This is what I want the textView to show:
label value
My code:
let txtView = cell.viewWithTag(77) as! UITextView
let leftStyle = NSMutableParagraphStyle()
leftStyle.alignment = NSTextAlignment.Left
let rightStyle = NSMutableParagraphStyle()
rightStyle.alignment = NSTextAlignment.Right
let attText = NSMutableAttributedString(string: "label", attributes: [NSParagraphStyleAttributeName: leftStyle])
attText.appendAttributedString(NSAttributedString(string: " "))
attText.appendAttributedString(NSAttributedString(string: "value", attributes: [NSParagraphStyleAttributeName: rightStyle]))
txtView.attributedText = attText
What I get instead:
label value
Using NSMutableParagraphStyle with NSTextTab:
let paragraph = NSMutableParagraphStyle()
paragraph.tabStops = [
NSTextTab(textAlignment: .Right, location: 100, options: [:]),
]
let str = "Label\tValue\n"
+ "foo\tbar\n"
let attributed = NSAttributedString(
string: str,
attributes: [NSParagraphStyleAttributeName: paragraph]
)
let view = UITextView(frame: CGRectMake(0, 0, 120, 120))
view.textContainer.lineFragmentPadding = 10
view.attributedText = attributed
Of course, this aligns to "tabstop", but not to the edge of UITextView. When you modify the size of the view, you have to also modify the location of NSTextTab.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
tableView.register(UITableViewCell.self, forCellReuseIdentifier: "cell")
let cell = Placestableview.dequeueReusableCell(withIdentifier: "cell", for: indexPath);
//first text
let attributestitle = [NSAttributedStringKey.font:
UIFont(name: "Helvetica-Bold", size: 15.0)!,
NSAttributedStringKey.foregroundColor: UIColor.black] as [NSAttributedStringKey: Any]
//second text
let attributedString = NSMutableAttributedString(string: "\t"+String(places[indexPath.row].distance!)+" miles", attributes: [NSAttributedStringKey.font: UIFont(name: "Helvetica-Bold", size: 8.0)!,NSAttributedStringKey.foregroundColor: UIColor.black])
let myParagraphStyle = NSMutableParagraphStyle()
myParagraphStyle.alignment = .right
myParagraphStyle.tabStops = [
NSTextTab(textAlignment: .right, location: 300, options: [:]),
]
let attributedStringtitle = NSMutableAttributedString(string: places[indexPath.row].title!, attributes: attributestitle)
//adding the right alignment to the second text alone
attributedString.addAttributes([.paragraphStyle: myParagraphStyle], range: NSRange(location: 0, length: attributedString.length))
//combining two texts with different alignments.
let combination = NSMutableAttributedString()
combination.append(attributedStringtitle)
combination.append(attributedString)
cell.textLabel?.attributedText = combination
return cell;
}
I'm trying to concatenate two UItextView and it work.
They have different properties (for example different UIFont) but in the final UITextView they have the same properties. How to fix this?
textViewFirst!.text = "\n Example"
textViewFirst!.font = UIFont(name: "Helvetica Neue", size: 10);
textViewSecond.text = textViewSecond.text + textViewFirst.text
for example : this makes your text bold from the 4th char to 7th
let myFullString:String = textViewSecond.text + textViewFirst.text as String
var attributedText: NSMutableAttributedString = NSMutableAttributedString(string: myFullString)
attributedText.addAttributes([NSFontAttributeName: UIFont.boldSystemFontOfSize(14)], range: NSRange(location: 3, length: 3))
textViewSecond.attributedText = attributedText
Try this:
var attributedString = NSMutableAttributedString(string: textView2.text, attributes: [NSFontAttributeName : textView2.font])
attributedString.appendAttributedString(NSAttributedString(string: textView1.text, attributes: [NSFontAttributeName : textView1.font]))
textView2.attributedText = attributedString
In order to preserve both fonts and maybe other attributes (like text color) you must make use of NSAttributedString
let font = UIFont(name: "Helvetica Neue", size: 10.0) ?? UIFont.systemFontOfSize(18.0)
let textFont = [NSFontAttributeName:font]
// Create a string that will be our paragraph
let para1 = NSMutableAttributedString()
let para2 = NSMutableAttributedString()
// Create locally formatted strings
let attrString1 = NSAttributedString(string: "Hello ", attributes:textFont)
let attrString2 = NSAttributedString(string: "World ", attributes:textFont)
// Add locally formatted strings to paragraph
para1.appendAttributedString(attrString1)
para2.appendAttributedString(attrString2)
// Define paragraph styling
let paraStyle = NSMutableParagraphStyle()
paraStyle.firstLineHeadIndent = 15.0
paraStyle.paragraphSpacingBefore = 10.0
// Apply paragraph styles to paragraph
para1.addAttribute(NSParagraphStyleAttributeName, value: paraStyle, range: NSRange(location: 0,length: para1.length))
para2.addAttribute(NSParagraphStyleAttributeName, value: paraStyle, range: NSRange(location: 0,length: para1.length))
// Create UITextView
let view1 = UITextView(frame: CGRect(x: 0, y: 20, width: CGRectGetWidth(self.view.frame), height: 100))
let view2 = UITextView(frame: CGRect(x: 0, y: 100, width: CGRectGetWidth(self.view.frame), height: 100))
let view3 = UITextView(frame: CGRect(x: 0, y: 200, width: CGRectGetWidth(self.view.frame), height: 100))
// Add string to UITextView
view1.attributedText = para1
view2.attributedText = para2
var attributedString = NSMutableAttributedString(string: view1.text, attributes: [NSFontAttributeName : view1.font])
attributedString.appendAttributedString(NSAttributedString(string: view2.text, attributes: [NSFontAttributeName : view2.font]))
view3.attributedText = attributedString
// Add UITextView to main view
self.view.addSubview(view1)
self.view.addSubview(view2)
self.view.addSubview(view3)