ios - 在 UILabel 中，每个字符串有多种颜色的多个字符串？

Question

在我的 UILabel 中，我想放置 3 个具有 3 种不同颜色的字符串。 每个字符串的一种特定颜色。

但我不想使用 NSRange(计算字符数)。我会找到一个改变整个字符串颜色的解决方案，不管他的长度。

例如:假设 firstString 是蓝色，secondString 是绿色，thirdString 是红色。

var firstString: [String] = "hello how"
var secondString: [String] = "are you"
var thirdString: [String] = "buddy?"

myLabel.text = "\(firstString) \(secondString) \(thirdString)"

有了这个输出:

Answer 1

这个，但这是一个 NSMutableAttributedString，你必须弄清楚如何使用它们，但是，无论你将这个字符串用于什么，你最喜欢从公开 AttributedText 的父类(super class)头中公开一些东西属性，您可以在其中为该属性分配“myString1”的值，然后您将不会为“文本”属性提供值。

var myString1 = NSMutableAttributedString(string:"hello how are you buddy")


let myString1Font1 = UIFont(name:"AvenirNext-Regular", size:24.0)


let myString1Color1 = UIColor(red: 0.292745, green: 0.461693, blue: 0.998524, alpha: 1.000000)
let myString1Color2 = UIColor(red: 0.000000, green: 0.176471, blue: 0.600000, alpha: 1.000000)
let myString1Color3 = UIColor(red: 0.333333, green: 0.556863, blue: 0.156863, alpha: 1.000000)
let myString1Color4 = UIColor(red: 0.643137, green: 0.031373, blue: 0.000000, alpha: 1.000000)


var myString1ParaStyle1 = NSMutableParagraphStyle()
myString1ParaStyle1.alignment = NSTextAlignment.Center



myString1.addAttribute(NSParagraphStyleAttributeName, value:myString1ParaStyle1, range:NSMakeRange(0,9))
myString1.addAttribute(NSUnderlineColorAttributeName, value:myString1Color1, range:NSMakeRange(0,9))
myString1.addAttribute(NSFontAttributeName, value:myString1Font1!, range:NSMakeRange(0,9))
myString1.addAttribute(NSForegroundColorAttributeName, value:myString1Color2, range:NSMakeRange(0,9))
myString1.addAttribute(NSParagraphStyleAttributeName, value:myString1ParaStyle1, range:NSMakeRange(9,8))
myString1.addAttribute(NSUnderlineColorAttributeName, value:myString1Color1, range:NSMakeRange(9,8))
myString1.addAttribute(NSFontAttributeName, value:myString1Font1!, range:NSMakeRange(9,8))
myString1.addAttribute(NSForegroundColorAttributeName, value:myString1Color3, range:NSMakeRange(9,8))
myString1.addAttribute(NSUnderlineColorAttributeName, value:myString1Color1, range:NSMakeRange(17,1))
myString1.addAttribute(NSParagraphStyleAttributeName, value:myString1ParaStyle1, range:NSMakeRange(17,1))
myString1.addAttribute(NSFontAttributeName, value:myString1Font1!, range:NSMakeRange(17,1))
myString1.addAttribute(NSParagraphStyleAttributeName, value:myString1ParaStyle1, range:NSMakeRange(18,5))
myString1.addAttribute(NSUnderlineColorAttributeName, value:myString1Color1, range:NSMakeRange(18,5))
myString1.addAttribute(NSFontAttributeName, value:myString1Font1!, range:NSMakeRange(18,5))
myString1.addAttribute(NSForegroundColorAttributeName, value:myString1Color4, range:NSMakeRange(18,5))

更好的答案没有我添加到我之前的答案中的下划线废话并且自然对齐:

var myString1 = NSMutableAttributedString(string:"hello how are you buddy")

let myString1Font1 = UIFont(name:"Helvetica", size:14.0)

let myString1Color1 = UIColor(red: 0.000000, green: 0.176471, blue: 0.600000, alpha: 1.000000)
let myString1Color2 = UIColor(red: 0.247059, green: 0.411765, blue: 0.117647, alpha: 1.000000)
let myString1Color3 = UIColor(red: 0.607843, green: 0.172549, blue: 0.003922, alpha: 1.000000)

var myString1ParaStyle1 = NSMutableParagraphStyle()
myString1ParaStyle1.alignment = NSTextAlignment.Natural


myString1.addAttribute(NSForegroundColorAttributeName, value:myString1Color1, range:NSMakeRange(0,9))
myString1.addAttribute(NSParagraphStyleAttributeName, value:myString1ParaStyle1, range:NSMakeRange(0,9))
myString1.addAttribute(NSFontAttributeName, value:myString1Font1!, range:NSMakeRange(0,9))
myString1.addAttribute(NSFontAttributeName, value:myString1Font1!, range:NSMakeRange(9,1))
myString1.addAttribute(NSParagraphStyleAttributeName, value:myString1ParaStyle1, range:NSMakeRange(9,1))
myString1.addAttribute(NSForegroundColorAttributeName, value:myString1Color2, range:NSMakeRange(10,7))
myString1.addAttribute(NSParagraphStyleAttributeName, value:myString1ParaStyle1, range:NSMakeRange(10,7))
myString1.addAttribute(NSFontAttributeName, value:myString1Font1!, range:NSMakeRange(10,7))
myString1.addAttribute(NSFontAttributeName, value:myString1Font1!, range:NSMakeRange(17,1))
myString1.addAttribute(NSParagraphStyleAttributeName, value:myString1ParaStyle1, range:NSMakeRange(17,1))
myString1.addAttribute(NSForegroundColorAttributeName, value:myString1Color3, range:NSMakeRange(18,5))
myString1.addAttribute(NSParagraphStyleAttributeName, value:myString1ParaStyle1, range:NSMakeRange(18,5))
myString1.addAttribute(NSFontAttributeName, value:myString1Font1!, range:NSMakeRange(18,5))

哦，是的，我看到你想要在 UILabel 中使用这个，UILabel 有一个名为“AttributedText”的属性，你应该将这个属性设置为我为你制作的这个字符串，不要设置“text”属性。

像这样做

myLabel.attributedText = myString1

另外，这里是简化的颜色:

let myString1Color1 = UIColor.blueColor()
let myString1Color2 = UIColor.greenColor()
let myString1Color3 = UIColor.redColor()

还有另一种方法:

var myString1 = NSMutableAttributedString(string:"hello how are you buddy?")

let myString1Font1 = UIFont(name:"Helvetica", size:14.0)

let myString1Color1 = UIColor.blueColor()
let myString1Color2 = UIColor.greenColor()
let myString1Color3 = UIColor.redColor()

let originalNSString = myString1.string as NSString
let myString1Range1 = originalNSString.rangeOfString("hello how ")
let myString1Range2 = originalNSString.rangeOfString("are you")
let myString1Range3 = originalNSString.rangeOfString(" ")
let myString1Range4 = originalNSString.rangeOfString("buddy?")

var myString1ParaStyle1 = NSMutableParagraphStyle()
myString1ParaStyle1.alignment = NSTextAlignment.Natural
myString1ParaStyle1.baseWritingDirection = NSWritingDirection.Natural
myString1ParaStyle1.defaultTabInterval = 0
myString1ParaStyle1.firstLineHeadIndent = 0
myString1ParaStyle1.headIndent = 0
myString1ParaStyle1.hyphenationFactor = 0
myString1ParaStyle1.lineBreakMode = NSLineBreakMode.ByWordWrapping
myString1ParaStyle1.lineHeightMultiple = 0
myString1ParaStyle1.lineSpacing = 0
myString1ParaStyle1.maximumLineHeight = 0
myString1ParaStyle1.minimumLineHeight = 0
myString1ParaStyle1.paragraphSpacing = 0
myString1ParaStyle1.paragraphSpacingBefore = 0
myString1ParaStyle1.tailIndent = 0

myString1.addAttribute(NSForegroundColorAttributeName, value:myString1Color1, range:myString1Range1)
myString1.addAttribute(NSParagraphStyleAttributeName, value:myString1ParaStyle1, range:myString1Range1)
myString1.addAttribute(NSFontAttributeName, value:myString1Font1!, range:myString1Range1)
myString1.addAttribute(NSForegroundColorAttributeName, value:myString1Color2, range:myString1Range2)
myString1.addAttribute(NSParagraphStyleAttributeName, value:myString1ParaStyle1, range:myString1Range2)
myString1.addAttribute(NSFontAttributeName, value:myString1Font1!, range:myString1Range2)
myString1.addAttribute(NSFontAttributeName, value:myString1Font1!, range:myString1Range3)
myString1.addAttribute(NSParagraphStyleAttributeName, value:myString1ParaStyle1, range:myString1Range3)
myString1.addAttribute(NSForegroundColorAttributeName, value:myString1Color3, range:myString1Range4)
myString1.addAttribute(NSParagraphStyleAttributeName, value:myString1ParaStyle1, range:myString1Range4)
myString1.addAttribute(NSFontAttributeName, value:myString1Font1!, range:myString1Range4)