你如何使用 NSAttributedString？
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【中文标题】你如何使用 NSAttributedString？【英文标题】：How do you use NSAttributedString? 【发布时间】：2011-03-29 18:46:12 【问题描述】：NSString 或 NSMutableStrings 中不可能有多种颜色。所以我听说了一些关于 NSAttributedString 的消息，它是随 iPad SDK 3.2（或大约 3.2）引入的，并且从 iPhone SDK 4.0 beta开始在 iPhone 上可用>.
我想要一个具有三种颜色的字符串。
我不使用 3 个单独的 NSStrings 的原因是因为三个 NSAttributedString 子字符串中的每一个的长度经常变化，所以我宁愿不使用任何计算来重新定位 3 个单独的 NSString 对象.
如果可以使用NSAttributedString，我该怎么做 - （如果不能使用 NSAttributed 字符串，你会怎么做）：
编辑：
请记住，@"first"、@"second" 和 @"third" 随时会被其他字符串替换。所以使用硬编码的 NSRange 值是行不通的。
【问题讨论】：
Attributed strings in Swift NSAttributeString 的 Swift 代码：***.com/questions/27728466/… 【参考方案1】：在构建属性字符串时，我更喜欢使用可变子类，只是为了保持简洁。
话虽如此，下面是创建三色属性字符串的方法：
NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithString:@"firstsecondthird"];
[string addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0,5)];
[string addAttribute:NSForegroundColorAttributeName value:[UIColor greenColor] range:NSMakeRange(5,6)];
[string addAttribute:NSForegroundColorAttributeName value:[UIColor blueColor] range:NSMakeRange(11,5)];
在浏览器中输入。 警告实现者
显然，您不会在这样的范围内进行硬编码。也许您可以这样做：
NSDictionary *wordToColorMapping = ....; //an NSDictionary of NSString => UIColor pairs
NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithString:@""];
for (NSString *word in wordToColorMapping)
UIColor *color = [wordToColorMapping objectForKey:word];
NSDictionary *attributes = [NSDictionary dictionaryWithObject:color forKey:NSForegroundColorAttributeName];
NSAttributedString *subString = [[NSAttributedString alloc] initWithString:word attributes:attributes];
[string appendAttributedString:subString];
[subString release];
//display string
【讨论】：
您能告诉我如何将属性字符串分配给标签吗？ @SyedFarazHaiderZaidi UIKit 没有内置任何东西可以接受NSAttributedString。不过也有开源的东西，比如OHAttributedLabel。
如果您在 ios 上使用 CoreText.framework，您可能需要常量 kCTForegroundColorAttributeName 而不是 NSForegroundColorAttributeName。
在刚刚发布的 iOS6 中（这样我就可以不用保密协议了），你可以做类似 myLabel.attributedText = attributesString;时间到了……我已经等了好几年了。
警告：字典键是无序的。不要使用上面的代码，你会失去对字符串显示顺序的控制。【参考方案2】：
这个问题已经回答了......但我想展示如何添加阴影并使用 NSAttributedString 更改字体，这样当人们搜索这个主题时，他们就不必继续寻找了。
#define FONT_SIZE 20
#define FONT_HELVETICA @"Helvetica-Light"
#define BLACK_SHADOW [UIColor colorWithRed:40.0f/255.0f green:40.0f/255.0f blue:40.0f/255.0f alpha:0.4f]
NSString*myNSString = @"This is my string.\nIt goes to a second line.";
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.alignment = NSTextAlignmentCenter;
paragraphStyle.lineSpacing = FONT_SIZE/2;
UIFont * labelFont = [UIFont fontWithName:FONT_HELVETICA size:FONT_SIZE];
UIColor * labelColor = [UIColor colorWithWhite:1 alpha:1];
NSShadow *shadow = [[NSShadow alloc] init];
[shadow setShadowColor : BLACK_SHADOW];
[shadow setShadowOffset : CGSizeMake (1.0, 1.0)];
[shadow setShadowBlurRadius : 1];
NSAttributedString *labelText = [[NSAttributedString alloc] initWithString : myNSString
attributes : @
NSParagraphStyleAttributeName : paragraphStyle,
NSKernAttributeName : @2.0,
NSFontAttributeName : labelFont,
NSForegroundColorAttributeName : labelColor,
NSShadowAttributeName : shadow ];
这是一个 Swift 版本...
警告！ 这适用于4s。
对于 5 秒，您必须将所有 Float 值更改为 Double 值（因为编译器尚未正常工作）
用于字体选择的 Swift 枚举：
enum FontValue: Int
case FVBold = 1 , FVCondensedBlack, FVMedium, FVHelveticaNeue, FVLight, FVCondensedBold, FVLightItalic, FVUltraLightItalic, FVUltraLight, FVBoldItalic, FVItalic
用于枚举访问的 Swift 数组（需要，因为枚举不能使用 '-'）：
func helveticaFont (index:Int) -> (String)
let fontArray = [
"HelveticaNeue-Bold",
"HelveticaNeue-CondensedBlack",
"HelveticaNeue-Medium",
"HelveticaNeue",
"HelveticaNeue-Light",
"HelveticaNeue-CondensedBold",
"HelveticaNeue-LightItalic",
"HelveticaNeue-UltraLightItalic",
"HelveticaNeue-UltraLight",
"HelveticaNeue-BoldItalic",
"HelveticaNeue-Italic",
]
return fontArray[index]
Swift 属性文本函数：
func myAttributedText (myString:String, mySize: Float, myFont:FontValue) -> (NSMutableAttributedString)
let shadow = NSShadow()
shadow.shadowColor = UIColor.textShadowColor()
shadow.shadowOffset = CGSizeMake (1.0, 1.0)
shadow.shadowBlurRadius = 1
let paragraphStyle = NSMutableParagraphStyle.alloc()
paragraphStyle.lineHeightMultiple = 1
paragraphStyle.lineBreakMode = NSLineBreakMode.ByWordWrapping
paragraphStyle.alignment = NSTextAlignment.Center
let labelFont = UIFont(name: helveticaFont(myFont.toRaw()), size: mySize)
let labelColor = UIColor.whiteColor()
let myAttributes :Dictionary = [NSParagraphStyleAttributeName : paragraphStyle,
NSKernAttributeName : 3, // (-1,5)
NSFontAttributeName : labelFont,
NSForegroundColorAttributeName : labelColor,
NSShadowAttributeName : shadow]
let myAttributedString = NSMutableAttributedString (string: myString, attributes:myAttributes)
// add new color
let secondColor = UIColor.blackColor()
let stringArray = myString.componentsSeparatedByString(" ")
let firstString: String? = stringArray.first
let letterCount = countElements(firstString!)
if firstString
myAttributedString.addAttributes([NSForegroundColorAttributeName:secondColor], range:NSMakeRange(0,letterCount))
return myAttributedString
用于在字符串数组中查找范围的第一个和最后一个扩展：
extension Array
var last: T?
if self.isEmpty
NSLog("array crash error - please fix")
return self [0]
else
return self[self.endIndex - 1]
extension Array
var first: T?
if self.isEmpty
NSLog("array crash error - please fix")
return self [0]
else
return self [0]
新颜色：
extension UIColor
class func shadowColor() -> UIColor
return UIColor(red: 0.0/255.0, green: 0.0/255.0, blue: 0.0/255.0, alpha: 0.3)
class func textShadowColor() -> UIColor
return UIColor(red: 50.0/255.0, green: 50.0/255.0, blue: 50.0/255.0, alpha: 0.5)
class func pastelBlueColor() -> UIColor
return UIColor(red: 176.0/255.0, green: 186.0/255.0, blue: 255.0/255.0, alpha: 1)
class func pastelYellowColor() -> UIColor
return UIColor(red: 255.0/255.0, green: 238.0/255.0, blue: 140.0/255.0, alpha: 1)
我的宏替换：
enum MyConstants: Float
case CornerRadius = 5.0
带有属性文本的按钮制作器：
func myButtonMaker (myView:UIView) -> UIButton
let myButton = UIButton.buttonWithType(.System) as UIButton
myButton.backgroundColor = UIColor.pastelBlueColor()
myButton.showsTouchWhenHighlighted = true;
let myCGSize:CGSize = CGSizeMake(100.0, 50.0)
let myFrame = CGRectMake(myView.frame.midX - myCGSize.height,myView.frame.midY - 2 * myCGSize.height,myCGSize.width,myCGSize.height)
myButton.frame = myFrame
let myTitle = myAttributedText("Button",20.0,FontValue.FVLight)
myButton.setAttributedTitle(myTitle, forState:.Normal)
myButton.layer.cornerRadius = myButton.bounds.size.width / MyConstants.CornerRadius.toRaw()
myButton.setTitleColor(UIColor.whiteColor(), forState: .Normal)
myButton.tag = 100
myButton.bringSubviewToFront(myView)
myButton.layerGradient()
myView.addSubview(myButton)
return myButton
我的带有属性文本、阴影和圆角的 UIView/UILabel 制造商：
func myLabelMaker (myView:UIView) -> UIView
let myFrame = CGRectMake(myView.frame.midX / 2 , myView.frame.midY / 2, myView.frame.width/2, myView.frame.height/2)
let mylabelFrame = CGRectMake(0, 0, myView.frame.width/2, myView.frame.height/2)
let myBaseView = UIView()
myBaseView.frame = myFrame
myBaseView.backgroundColor = UIColor.clearColor()
let myLabel = UILabel()
myLabel.backgroundColor=UIColor.pastelYellowColor()
myLabel.frame = mylabelFrame
myLabel.attributedText = myAttributedText("This is my String",20.0,FontValue.FVLight)
myLabel.numberOfLines = 5
myLabel.tag = 100
myLabel.layer.cornerRadius = myLabel.bounds.size.width / MyConstants.CornerRadius.toRaw()
myLabel.clipsToBounds = true
myLabel.layerborders()
myBaseView.addSubview(myLabel)
myBaseView.layerShadow()
myBaseView.layerGradient()
myView.addSubview(myBaseView)
return myLabel
通用阴影添加：
func viewshadow<T where T: UIView> (shadowObject: T)
let layer = shadowObject.layer
let radius = shadowObject.frame.size.width / MyConstants.CornerRadius.toRaw();
layer.borderColor = UIColor.whiteColor().CGColor
layer.borderWidth = 0.8
layer.cornerRadius = radius
layer.shadowOpacity = 1
layer.shadowRadius = 3
layer.shadowOffset = CGSizeMake(2.0,2.0)
layer.shadowColor = UIColor.shadowColor().CGColor
视图样式的视图扩展：
extension UIView
func layerborders()
let layer = self.layer
let frame = self.frame
let myColor = self.backgroundColor
layer.borderColor = myColor.CGColor
layer.borderWidth = 10.8
layer.cornerRadius = layer.borderWidth / MyConstants.CornerRadius.toRaw()
func layerShadow()
let layer = self.layer
let frame = self.frame
layer.cornerRadius = layer.borderWidth / MyConstants.CornerRadius.toRaw()
layer.shadowOpacity = 1
layer.shadowRadius = 3
layer.shadowOffset = CGSizeMake(2.0,2.0)
layer.shadowColor = UIColor.shadowColor().CGColor
func layerGradient()
let layer = CAGradientLayer()
let size = self.frame.size
layer.frame.size = size
layer.frame.origin = CGPointMake(0.0,0.0)
layer.cornerRadius = layer.bounds.size.width / MyConstants.CornerRadius.toRaw();
var color0 = CGColorCreateGenericRGB(250.0/255, 250.0/255, 250.0/255, 0.5)
var color1 = CGColorCreateGenericRGB(200.0/255, 200.0/255, 200.0/255, 0.1)
var color2 = CGColorCreateGenericRGB(150.0/255, 150.0/255, 150.0/255, 0.1)
var color3 = CGColorCreateGenericRGB(100.0/255, 100.0/255, 100.0/255, 0.1)
var color4 = CGColorCreateGenericRGB(50.0/255, 50.0/255, 50.0/255, 0.1)
var color5 = CGColorCreateGenericRGB(0.0/255, 0.0/255, 0.0/255, 0.1)
var color6 = CGColorCreateGenericRGB(150.0/255, 150.0/255, 150.0/255, 0.1)
layer.colors = [color0,color1,color2,color3,color4,color5,color6]
self.layer.insertSublayer(layer, atIndex: 2)
实际视图确实加载了函数：
func buttonPress (sender:UIButton!)
NSLog("%@", "ButtonPressed")
override func viewDidLoad()
super.viewDidLoad()
let myLabel = myLabelMaker(myView)
let myButton = myButtonMaker(myView)
myButton.addTarget(self, action: "buttonPress:", forControlEvents:UIControlEvents.TouchUpInside)
viewshadow(myButton)
viewshadow(myLabel)
【讨论】：
【参考方案3】：我认为，使用regular expressions 查找应用属性的范围是一种非常方便的方法。我就是这样做的：
NSMutableAttributedString *goodText = [[NSMutableAttributedString alloc] initWithString:articleText];
NSRange range = [articleText rangeOfString:@"\\[.+?\\]" options:NSRegularExpressionSearch|NSCaseInsensitiveSearch];
if (range.location != NSNotFound)
[goodText addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"Georgia" size:16] range:range];
[goodText addAttribute:NSForegroundColorAttributeName value:[UIColor brownColor] range:range];
NSString *regEx = [NSString stringWithFormat:@"%@.+?\\s", [self.article.titleText substringToIndex:0]];
range = [articleText rangeOfString:regEx options:NSRegularExpressionSearch|NSCaseInsensitiveSearch];
if (range.location != NSNotFound)
[goodText addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"Georgia-Bold" size:20] range:range];
[goodText addAttribute:NSForegroundColorAttributeName value:[UIColor blueColor] range:range];
[self.textView setAttributedText:goodText];
我正在搜索可用属性的列表，但在此处和类参考的第一页中没有找到它们。所以我决定在这里发布相关信息。
Standard Attributes
属性字符串支持文本的以下标准属性。如果键不在字典中，则使用下面描述的默认值。
NSString *NSFontAttributeName;
NSString *NSParagraphStyleAttributeName;
NSString *NSForegroundColorAttributeName;
NSString *NSUnderlineStyleAttributeName;
NSString *NSSuperscriptAttributeName;
NSString *NSBackgroundColorAttributeName;
NSString *NSAttachmentAttributeName;
NSString *NSLigatureAttributeName;
NSString *NSBaselineOffsetAttributeName;
NSString *NSKernAttributeName;
NSString *NSLinkAttributeName;
NSString *NSStrokeWidthAttributeName;
NSString *NSStrokeColorAttributeName;
NSString *NSUnderlineColorAttributeName;
NSString *NSStrikethroughStyleAttributeName;
NSString *NSStrikethroughColorAttributeName;
NSString *NSShadowAttributeName;
NSString *NSObliquenessAttributeName;
NSString *NSExpansionAttributeName;
NSString *NSCursorAttributeName;
NSString *NSToolTipAttributeName;
NSString *NSMarkedClauseSegmentAttributeName;
NSString *NSWritingDirectionAttributeName;
NSString *NSVerticalGlyphFormAttributeName;
NSString *NSTextAlternativesAttributeName;
NSAttributedString programming guide
完整的课程参考是here。
【讨论】：
感谢列出属性键（否则很难找到） 你会如何在 Swift 中做到这一点？【参考方案4】：我写了助手来轻松添加属性：
- (void)addColor:(UIColor *)color substring:(NSString *)substring;
- (void)addBackgroundColor:(UIColor *)color substring:(NSString *)substring;
- (void)addUnderlineForSubstring:(NSString *)substring;
- (void)addStrikeThrough:(int)thickness substring:(NSString *)substring;
- (void)addShadowColor:(UIColor *)color width:(int)width height:(int)height radius:(int)radius substring:(NSString *)substring;
- (void)addFontWithName:(NSString *)fontName size:(int)fontSize substring:(NSString *)substring;
- (void)addAlignment:(NSTextAlignment)alignment substring:(NSString *)substring;
- (void)addColorToRussianText:(UIColor *)color;
- (void)addStrokeColor:(UIColor *)color thickness:(int)thickness substring:(NSString *)substring;
- (void)addVerticalGlyph:(BOOL)glyph substring:(NSString *)substring;
https://github.com/shmidt/MASAttributes
您也可以通过 CocoaPods 安装：pod 'MASAttributes', '~> 1.0.0'
【讨论】：
【参考方案5】：我总是发现使用属性字符串是一个非常冗长和乏味的过程。
所以我制作了一个 Mac 应用程序，它可以为您创建所有代码。
https://itunes.apple.com/us/app/attributed-string-creator/id730928349?mt=12
【讨论】：
这里还有一个类别/博客文章，用于使 NSAttributed 字符串更容易一些。 raizlabs.com/dev/2014/03/nsattributedstring-creation-helpers【参考方案6】：从 iOS 7 开始，您可以使用带有 html 语法的 NSAttributedString：
NSURL *htmlString = [[NSBundle mainBundle] URLForResource: @"string" withExtension:@"html"];
NSAttributedString *stringWithHTMLAttributes = [[NSAttributedString alloc] initWithFileURL:htmlString
options:@NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType
documentAttributes:nil
error:nil];
textView.attributedText = stringWithHTMLAttributes;// you can use a label also
你必须将文件“string.html”添加到你的项目中，html的内容可以是这样的：
<html>
<head>
<style type="text/css">
body
font-size: 15px;
font-family: Avenir, Arial, sans-serif;
.red
color: red;
.green
color: green;
.blue
color: blue;
</style>
</head>
<body>
<span class="red">first</span><span class="green">second</span><span class="blue">third</span>
</body>
</html>
现在，您可以随意使用NSAttributedString，即使没有 HTML 文件，例如：
//At the top of your .m file
#define RED_OCCURENCE -red_occurence-
#define GREEN_OCCURENCE -green_occurence-
#define BLUE_OCCURENCE -blue_occurence-
#define HTML_TEMPLATE @"<span style=\"color:red\">-red_occurence-</span><span style=\"color:green\">-green_occurence-</span><span style=\"color:blue\">-blue_occurence-</span></body></html>"
//Where you need to use your attributed string
NSString *string = [HTML_TEMPLATE stringByReplacingOccurrencesOfString:RED_OCCURENCE withString:@"first"] ;
string = [string stringByReplacingOccurrencesOfString:GREEN_OCCURENCE withString:@"second"];
string = [string stringByReplacingOccurrencesOfString:BLUE_OCCURENCE withString:@"third"];
NSData* cData = [string dataUsingEncoding:NSUTF8StringEncoding];
NSAttributedString *stringWithHTMLAttributes = [[NSAttributedString alloc] initWithData:cData
options:@NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType
documentAttributes:nil
error:nil];
textView.attributedText = stringWithHTMLAttributes;
Source
【讨论】：
【参考方案7】：您可以在Swift 中加载HTML 属性字符串，如下所示
var Str = NSAttributedString(
data: htmlstring.dataUsingEncoding(NSUnicodeStringEncoding, allowLossyConversion: true),
options: [ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType],
documentAttributes: nil,
error: nil)
label.attributedText = Str
从文件加载html
if let rtf = NSBundle.mainBundle().URLForResource("rtfdoc", withExtension: "rtf", subdirectory: nil, localization: nil)
let attributedString = NSAttributedString(fileURL: rtf, options: [NSDocumentTypeDocumentAttribute:NSRTFTextDocumentType], documentAttributes: nil, error: nil)
textView.attributedText = attributedString
textView.editable = false
http://sketchytech.blogspot.in/2013/11/creating-nsattributedstring-from-html.html
并根据您所需的属性设置字符串..按照这个..http://makeapppie.com/2014/10/20/swift-swift-using-attributed-strings-in-swift/
【讨论】：
【参考方案8】：- (void)changeColorWithString:(UILabel *)uilabel stringToReplace:(NSString *) stringToReplace uiColor:(UIColor *) uiColor
NSMutableAttributedString *text =
[[NSMutableAttributedString alloc]
initWithAttributedString: uilabel.attributedText];
[text addAttribute: NSForegroundColorAttributeName value:uiColor range:[uilabel.text rangeOfString:stringToReplace]];
[uilabel setAttributedText: text];
【讨论】：
【参考方案9】：此解决方案适用于任何长度
NSString *strFirst = @"Anylengthtext";
NSString *strSecond = @"Anylengthtext";
NSString *strThird = @"Anylengthtext";
NSString *strComplete = [NSString stringWithFormat:@"%@ %@ %@",strFirst,strSecond,strThird];
NSMutableAttributedString *attributedString =[[NSMutableAttributedString alloc] initWithString:strComplete];
[attributedString addAttribute:NSForegroundColorAttributeName
value:[UIColor redColor]
range:[strComplete rangeOfString:strFirst]];
[attributedString addAttribute:NSForegroundColorAttributeName
value:[UIColor yellowColor]
range:[strComplete rangeOfString:strSecond]];
[attributedString addAttribute:NSForegroundColorAttributeName
value:[UIColor blueColor]
range:[strComplete rangeOfString:strThird]];
self.lblName.attributedText = attributedString;
【讨论】：
请注意，对于 SWIFT，您仍需要使用 NSString，因为范围的原因，请查看此答案：***.com/a/27041376/1736679【参考方案10】：我创建了一个库，使这变得更容易。查看ZenCopy.
您可以创建样式对象，和/或将它们设置为键以供以后参考。像这样：
ZenCopy.manager.config.setStyles
return [
"token": Style(
color: .blueColor(), // optional
// fontName: "Helvetica", // optional
fontSize: 14 // optional
)
]
然后，您可以轻松地构造字符串并设置它们的样式并设置参数:)
label.attributedText = attributedString(
["$0 ".style("token") "is dancing with ", "$1".style("token")],
args: ["JP", "Brock"]
)
您还可以使用正则表达式搜索轻松地设置样式！
let atUserRegex = "(@[A-Za-z0-9_]*)"
mutableAttributedString.regexFind(atUserRegex, addStyle: "token")
这会将前面带有“@”的所有单词设置为“token”样式。 （例如@jpmcglone）
我仍然需要使用 NSAttributedString 提供的所有功能使其正常工作，但我认为 fontName、fontSize 和颜色覆盖了大部分内容。期待很快会有很多更新:)
如果您需要，我可以帮助您开始。也在寻找反馈，所以如果它能让你的生活更轻松，我会说任务完成了。
【讨论】：
【参考方案11】：为了解决这类问题，我在 swift 中创建了名为 Atributika 的库。
let str = "<r>first</r><g>second</g><b>third</b>".style(tags:
Style("r").foregroundColor(.red),
Style("g").foregroundColor(.green),
Style("b").foregroundColor(.blue)).attributedString
label.attributedText = str
你可以在这里找到它https://github.com/psharanda/Atributika
【讨论】：
【参考方案12】：带有属性字符串扩展的更简单的解决方案。
extension NSMutableAttributedString
// this function attaches color to string
func setColorForText(textToFind: String, withColor color: UIColor)
let range: NSRange = self.mutableString.range(of: textToFind, options: .caseInsensitive)
self.addAttribute(NSAttributedStringKey.foregroundColor, value: color, range: range)
试试这个看看（在 Swift 3 和 4 中测试）
let label = UILabel()
label.frame = CGRect(x: 120, y: 100, width: 200, height: 30)
let first = "first"
let second = "second"
let third = "third"
let stringValue = "\(first)\(second)\(third)" // or direct assign single string value like "firstsecondthird"
let attributedString: NSMutableAttributedString = NSMutableAttributedString(string: stringValue)
attributedString.setColorForText(textToFind: first, withColor: UIColor.red) // use variable for string "first"
attributedString.setColorForText(textToFind: "second", withColor: UIColor.green) // or direct string like this "second"
attributedString.setColorForText(textToFind: third, withColor: UIColor.blue)
label.font = UIFont.systemFont(ofSize: 26)
label.attributedText = attributedString
self.view.addSubview(label)
这是预期的结果：
【讨论】：
【参考方案13】：在 Swift 4 中：
let string:NSMutableAttributedString =
let mutableString = NSMutableAttributedString(string: "firstsecondthird")
mutableString.addAttribute(NSForegroundColorAttributeName, value: UIColor.red , range: NSRange(location: 0, length: 5))
mutableString.addAttribute(NSForegroundColorAttributeName, value: UIColor.green , range: NSRange(location: 5, length: 6))
mutableString.addAttribute(NSForegroundColorAttributeName, value: UIColor.blue , range: NSRange(location: 11, length: 5))
return mutableString
()
print(string)
【讨论】：
请不要对多个问题发布相同的答案。发布一个好的答案，然后投票/标记以关闭其他问题作为重复问题。如果问题不是重复的，调整您对该问题的回答。 我正在尝试用 Swift 给出答案。我接受了它的副本。不期待投票 道歉。我已经删除了答案【参考方案14】：斯威夫特 4
let combination = NSMutableAttributedString()
var part1 = NSMutableAttributedString()
var part2 = NSMutableAttributedString()
var part3 = NSMutableAttributedString()
let attrRegular = [NSAttributedStringKey.font : UIFont(name: "Palatino-Roman", size: 15)]
let attrBold:Dictionary = [NSAttributedStringKey.font : UIFont(name: "Raleway-SemiBold", size: 15)]
let attrBoldWithColor: Dictionary = [NSAttributedStringKey.font : UIFont(name: "Raleway-SemiBold", size: 15),
NSAttributedStringKey.foregroundColor: UIColor.red]
if let regular = attrRegular as? [NSAttributedStringKey : NSObject]
part1 = NSMutableAttributedString(string: "first", attributes: regular)
if let bold = attrRegular as? [NSAttributedStringKey : NSObject]
part2 = NSMutableAttributedString(string: "second", attributes: bold)
if let boldWithColor = attrBoldWithColor as? [NSAttributedStringKey : NSObject]
part3 = NSMutableAttributedString(string: "third", attributes: boldWithColor)
combination.append(part1)
combination.append(part2)
combination.append(part3)
属性列表请看这里 NSAttributedStringKey on Apple Docs
【讨论】：
【参考方案15】：超级简单的方法。
let text = "This is a colorful attributed string"
let attributedText =
NSMutableAttributedString.getAttributedString(fromString: text)
attributedText.apply(color: .red, subString: "This")
//Apply yellow color on range
attributedText.apply(color: .yellow, onRange: NSMakeRange(5, 4))
更多详情请点击这里； https://github.com/iOSTechHub/AttributedString
【讨论】：
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