Ios 具有多种字体和字体大小的NSAttribute字符串的行距
我有一个字符串,我想在UILabel或UITextView中设置,并且没有行距或很少。我知道NSParagraph样式具有最大和最小线宽以及线宽倍数。我尝试了所有方法,但仍然得到奇怪的结果。可能还需要使用“基线偏移”属性,但如果需要,如何找到动态值以保持线间距均匀且线间距非常小?Ios 具有多种字体和字体大小的NSAttribute字符串的行距,ios,swift,uilabel,uitextview,nsattributedstring,Ios,Swift,Uilabel,Uitextview,Nsattributedstring,我有一个字符串,我想在UILabel或UITextView中设置,并且没有行距或很少。我知道NSParagraph样式具有最大和最小线宽以及线宽倍数。我尝试了所有方法,但仍然得到奇怪的结果。可能还需要使用“基线偏移”属性,但如果需要,如何找到动态值以保持线间距均匀且线间距非常小? 这里有一个例子。为了节省任何人的工作,我有一个开关,使每个字符串可以使用自己的段落风格 //: A UIKit based Playground for presenting user interface impo
这里有一个例子。为了节省任何人的工作,我有一个开关,使每个字符串可以使用自己的段落风格
//: A UIKit based Playground for presenting user interface
import UIKit
import PlaygroundSupport
class MyViewController : UIViewController {
override func loadView() {
let view = UIView()
view.backgroundColor = .white
let label = UILabel()
label.frame = CGRect(x: 150, y: 200, width: 200, height: 20)
label.text = "Hello World!"
label.textColor = .black
label.numberOfLines = 0
label.backgroundColor = UIColor.green
view.addSubview(label)
self.view = view
let tryWithIndParagraphStyles = false
if tryWithIndParagraphStyles{
let mutAttr = NSMutableAttributedString()
let para = NSMutableParagraphStyle()
para.alignment = .center
//WE COULD TRY LINE HEIGHT OR LINE HEIGHT MULTIPLE but the spacing is still wrong
// para.lineHeightMultiple = 0.75
//we could manually set the line heights for each
let firstFont = UIFont.systemFont(ofSize: 75.56262594898386)
let firstPara = NSMutableParagraphStyle()
firstPara.alignment = .center
firstPara.minimumLineHeight = firstFont.pointSize - firstFont.ascender + firstFont.capHeight
firstPara.maximumLineHeight = firstFont.pointSize - firstFont.ascender + firstFont.capHeight
let firstStr = NSAttributedString(string: "HEY\r", attributes: [.font:firstFont,.paragraphStyle:firstPara])
mutAttr.append(firstStr)
let secondFont = UIFont.systemFont(ofSize: 24.099621199347652)
let secondPara = NSMutableParagraphStyle()
secondPara.alignment = .center
secondPara.minimumLineHeight = secondFont.pointSize - secondFont.ascender + secondFont.capHeight
secondPara.maximumLineHeight = secondFont.pointSize - secondFont.ascender + secondFont.capHeight
let secondStr = NSAttributedString(string: "BEGGING TO\r", attributes: [.font:secondFont,.paragraphStyle:secondPara])
mutAttr.append(secondStr)
let thirdFont = UIFont.systemFont(ofSize: 59.53419014162365)
let thirdPara = NSMutableParagraphStyle()
thirdPara.alignment = .center
thirdPara.minimumLineHeight = thirdFont.pointSize - thirdFont.ascender + thirdFont.capHeight
thirdPara.maximumLineHeight = thirdFont.pointSize - thirdFont.ascender + thirdFont.capHeight
let thirdStr = NSAttributedString(string: "TEST\r", attributes: [.font:thirdFont,.paragraphStyle:thirdPara])
mutAttr.append(thirdStr)
let fourthFont = UIFont.systemFont(ofSize: 20.96469640066495)
let fourthPara = NSMutableParagraphStyle()
fourthPara.alignment = .center
fourthPara.minimumLineHeight = fourthFont.pointSize - fourthFont.ascender + fourthFont.capHeight
thirdPara.maximumLineHeight = fourthFont.pointSize - fourthFont.ascender + fourthFont.capHeight
let fourthStr = NSAttributedString(string: "HAMBURGERS", attributes: [.font:fourthFont,.paragraphStyle:fourthPara])
mutAttr.append(fourthStr)
label.attributedText = mutAttr
label.sizeToFit()
}else{
let mutAttr = NSMutableAttributedString()
let para = NSMutableParagraphStyle()
para.alignment = .center
//WE COULD TRY LINE HEIGHT OR LINE HEIGHT MULTIPLE but the spacing is still wrong
para.lineHeightMultiple = 0.75
//we could manually set the line heights for each
let firstFont = UIFont.systemFont(ofSize: 75.56262594898386)
let firstStr = NSAttributedString(string: "HEY\r", attributes: [.font:firstFont,.paragraphStyle:para])
mutAttr.append(firstStr)
let secondStr = NSAttributedString(string: "BEGGING TO\r", attributes: [.font:UIFont.systemFont(ofSize: 24.099621199347652),.paragraphStyle:para])
mutAttr.append(secondStr)
let thirdStr = NSAttributedString(string: "TEST\r", attributes: [.font:UIFont.systemFont(ofSize: 59.53419014162365),.paragraphStyle:para])
mutAttr.append(thirdStr)
let fourthStr = NSAttributedString(string: "HAMBURGERS", attributes: [.font:UIFont.systemFont(ofSize: 20.96469640066495),.paragraphStyle:para])
mutAttr.append(fourthStr)
label.attributedText = mutAttr
label.sizeToFit()
}
}
}
// Present the view controller in the Live View window
PlaygroundPage.current.liveView = MyViewController()
你使用了错误的属性。在之前考虑<代码>段落空间。如何找到动态值来调整该值。这是否需要知道前几行字体或当前几行字体?我很确定段落间距之前不会完成,因为它不能是负数,以便使行更接近。可能与简单的
段落间距
结合使用?我认为它不可能是负数。我认为基线偏移可能会很小,但可能是马车把事情弄糟了。我已经在这上面挖了很长时间了。我没有发现任何令人惊讶的合理例子。