Ios 加粗；单个UILabel中的非粗体文本？_Ios_Objective C_Swift_Uilabel_Nsattributedstring

Ios 加粗；单个UILabel中的非粗体文本？

ios objective-c swift

Ios 加粗；单个UILabel中的非粗体文本？,ios,objective-c,swift,uilabel,nsattributedstring,Ios,Objective C,Swift,Uilabel,Nsattributedstring,如何在uiLabel中同时包含粗体和非粗体文本我不想使用UIWebView。。我也读过这篇文章，也许可以使用NSAttributedString，但我不知道如何使用它。有什么想法吗苹果在他们的几个应用程序中实现了这一点；示例屏幕截图：谢谢！ -Dom更新在Swift中，我们不必处理iOS5的旧东西，语法更短，因此一切都变得非常简单： Swift 5 Swift 3 用法： myLabel.text = @"Updated: 2012/10/14 21:59 PM"; [myLabel

如何在uiLabel中同时包含粗体和非粗体文本

我不想使用UIWebView。。我也读过这篇文章，也许可以使用NSAttributedString，但我不知道如何使用它。有什么想法吗

苹果在他们的几个应用程序中实现了这一点；示例屏幕截图：

谢谢！ -Dom更新在Swift中，我们不必处理iOS5的旧东西，语法更短，因此一切都变得非常简单：

Swift 5

Swift 3

用法：

myLabel.text = @"Updated: 2012/10/14 21:59 PM";
[myLabel boldSubstring: @"Updated:"];
[myLabel boldSubstring: @"21:59 PM"];

奖金：国际化一些人评论了国际化。我个人认为这超出了这个问题的范围，但出于教学目的，我会这样做

// Date we want to show
let date = Date()

// Create the string.
// I don't set the locale because the default locale of the formatter is `NSLocale.current` so it's good for internationalisation :p
let formatter = DateFormatter()
formatter.dateStyle = .medium
formatter.timeStyle = .short
let targetString = String(format: NSLocalizedString("Update %@", comment: "Updated string format"),
                          formatter.string(from: date))

// Find the range of the non-bold part
formatter.timeStyle = .none
let nonBoldRange = targetString.range(of: formatter.string(from: date))

// Convert Range<Int> into NSRange
let nonBoldNSRange: NSRange? = nonBoldRange == nil ?
    nil :
    NSMakeRange(targetString.distance(from: targetString.startIndex, to: nonBoldRange!.lowerBound),
                targetString.distance(from: nonBoldRange!.lowerBound, to: nonBoldRange!.upperBound))

// Now just build the attributed string as before :)
label.attributedText = attributedString(from: targetString,
                                        nonBoldRange: nonBoldNSRange)

我们只需要创建属性字符串：

if ([_label respondsToSelector:@selector(setAttributedText:)])
{
    // iOS6 and above : Use NSAttributedStrings

    // Create the attributes
    const CGFloat fontSize = 13;
    NSDictionary *attrs = @{
        NSFontAttributeName:[UIFont boldSystemFontOfSize:fontSize],
        NSForegroundColorAttributeName:[UIColor whiteColor]
    };
    NSDictionary *subAttrs = @{
        NSFontAttributeName:[UIFont systemFontOfSize:fontSize]
    };

    // Range of " 2012/10/14 " is (8,12). Ideally it shouldn't be hardcoded
    // This example is about attributed strings in one label
    // not about internationalisation, so we keep it simple :)
    // For internationalisation example see above code in swift
    const NSRange range = NSMakeRange(8,12);

    // Create the attributed string (text + attributes)
    NSMutableAttributedString *attributedText =
      [[NSMutableAttributedString alloc] initWithString:text
                                             attributes:attrs];
    [attributedText setAttributes:subAttrs range:range];

    // Set it in our UILabel and we are done!
    [_label setAttributedText:attributedText];
} else {
    // iOS5 and below
    // Here we have some options too. The first one is to do something
    // less fancy and show it just as plain text without attributes.
    // The second is to use CoreText and get similar results with a bit
    // more of code. Interested people please look down the old answer.

    // Now I am just being lazy so :p
    [_label setText:text];
}

invasivecode上有几篇很好的介绍性博文，用更多的例子解释了

NSAttributedString

的用法，查找“iOS 6的NSAttributedString简介”和“iOS使用界面生成器的属性字符串”：

PS：上面的代码应该可以工作，但它是大脑编译的。我希望这足够了：）

iOS5及以下版本的旧答案与NSAttributed字符串一起使用！比2个UILabel更轻、更简单。（iOS 3.2及以上版本）

例如

不要忘记添加QuartzCore框架（CALayers需要）和CoreText（属性字符串需要）

在本例中，我只有两种不同类型的字体（粗体和普通），但也可以有不同的字体大小、不同的颜色、斜体、下划线等。看看/和

希望它能帮助你退房。它是UILabel的一个替代品，通过将NSAttributed字符串设置为标签的文本，您可以在单个标签中使用混合字体和颜色。

使用以下代码。我希望这对你有帮助

NSString *needToChangeStr=@"BOOK";
NSString *display_string=[NSString stringWithFormat:@"This is %@",book];

NSMutableAttributedString *attri_str=[[NSMutableAttributedString alloc]initWithString:display_string];

int begin=[display_string length]-[needToChangeStr length];
int end=[needToChangeStr length];


[attri_str addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"HelveticaNeue-Bold" size:30] range:NSMakeRange(begin, end)];

尝试UILabel上的类别：

下面是它的用法：

myLabel.text = @"Updated: 2012/10/14 21:59 PM";
[myLabel boldSubstring: @"Updated:"];
[myLabel boldSubstring: @"21:59 PM"];

这是分类

UILabel+Boldify.h

- (void) boldSubstring: (NSString*) substring;
- (void) boldRange: (NSRange) range;

@interface UILabel (Boldify)
- (void) boldSubstring: (NSString*) substring;
- (void) boldRange: (NSRange) range;
@end

UILabel+Boldify.m

- (void) boldRange: (NSRange) range {
    if (![self respondsToSelector:@selector(setAttributedText:)]) {
        return;
    }
    NSMutableAttributedString *attributedText = [[NSMutableAttributedString alloc] initWithAttributedString:self.attributedText];
    [attributedText setAttributes:@{NSFontAttributeName:[UIFont boldSystemFontOfSize:self.font.pointSize]} range:range];

    self.attributedText = attributedText;    
}

- (void) boldSubstring: (NSString*) substring {
    NSRange range = [self.text rangeOfString:substring];
    [self boldRange:range];
}

@implementation UILabel (Boldify)
- (void)boldRange:(NSRange)range {
    if (![self respondsToSelector:@selector(setAttributedText:)]) {
        return;
    }
    NSMutableAttributedString *attributedText;
    if (!self.attributedText) {
        attributedText = [[NSMutableAttributedString alloc] initWithString:self.text];
    } else {
        attributedText = [[NSMutableAttributedString alloc] initWithAttributedString:self.attributedText];
    }
    [attributedText setAttributes:@{NSFontAttributeName:[UIFont boldSystemFontOfSize:self.font.pointSize]} range:range];
    self.attributedText = attributedText;
}

- (void)boldSubstring:(NSString*)substring {
    NSRange range = [self.text rangeOfString:substring];
    [self boldRange:range];
}
@end

请注意，这只适用于iOS 6及更高版本。在iOS 5及更早版本中，它将被忽略

在这种情况下，您可以尝试

UILabel *displayLabel = [[UILabel alloc] initWithFrame:/*label frame*/];
displayLabel.font = [UIFont boldSystemFontOfSize:/*bold font size*/];

NSMutableAttributedString *notifyingStr = [[NSMutableAttributedString alloc] initWithString:@"Updated: 2012/10/14 21:59 PM"];
[notifyingStr beginEditing];
[notifyingStr addAttribute:NSFontAttributeName
                     value:[UIFont systemFontOfSize:/*normal font size*/]
                     range:NSMakeRange(8,10)/*range of normal string, e.g. 2012/10/14*/];
[notifyingStr endEditing];

displayLabel.attributedText = notifyingStr; // or [displayLabel setAttributedText: notifyingStr];

有一个基于bbrame的类别的类别。它的工作原理类似，但允许您将相同的

UILabel

以累积结果多次加粗

UILabel+Boldify.h

- (void) boldSubstring: (NSString*) substring;
- (void) boldRange: (NSRange) range;

@interface UILabel (Boldify)
- (void) boldSubstring: (NSString*) substring;
- (void) boldRange: (NSRange) range;
@end

UILabel+Boldify.m

- (void) boldRange: (NSRange) range {
    if (![self respondsToSelector:@selector(setAttributedText:)]) {
        return;
    }
    NSMutableAttributedString *attributedText = [[NSMutableAttributedString alloc] initWithAttributedString:self.attributedText];
    [attributedText setAttributes:@{NSFontAttributeName:[UIFont boldSystemFontOfSize:self.font.pointSize]} range:range];

    self.attributedText = attributedText;    
}

- (void) boldSubstring: (NSString*) substring {
    NSRange range = [self.text rangeOfString:substring];
    [self boldRange:range];
}

@implementation UILabel (Boldify)
- (void)boldRange:(NSRange)range {
    if (![self respondsToSelector:@selector(setAttributedText:)]) {
        return;
    }
    NSMutableAttributedString *attributedText;
    if (!self.attributedText) {
        attributedText = [[NSMutableAttributedString alloc] initWithString:self.text];
    } else {
        attributedText = [[NSMutableAttributedString alloc] initWithAttributedString:self.attributedText];
    }
    [attributedText setAttributes:@{NSFontAttributeName:[UIFont boldSystemFontOfSize:self.font.pointSize]} range:range];
    self.attributedText = attributedText;
}

- (void)boldSubstring:(NSString*)substring {
    NSRange range = [self.text rangeOfString:substring];
    [self boldRange:range];
}
@end

通过此更正，您可以多次使用它，例如：

myLabel.text = @"Updated: 2012/10/14 21:59 PM";
[myLabel boldSubstring: @"Updated:"];
[myLabel boldSubstring: @"21:59 PM"];

结果将是：“更新：2012/10/1421:59 PM”

如果您想更轻松地使用属性字符串，请尝试使用属性字符串创建者，它将为您生成代码

这在界面生成器中很容易做到：

1）在属性检查器中使UILabel属性化

2）选择要加粗的短语部分

3）在字体选择器中更改其字体（或相同字体的粗体字体）

就这些
这对我很有效：

CGFloat boldTextFontSize = 17.0f; myLabel.text = [NSString stringWithFormat:@"%@ 2012/10/14 %@",@"Updated:",@"21:59 PM"]; NSRange range1 = [myLabel.text rangeOfString:@"Updated:"]; NSRange range2 = [myLabel.text rangeOfString:@"21:59 PM"]; NSMutableAttributedString *attributedText = [[NSMutableAttributedString alloc] initWithString:myLabel.text]; [attributedText setAttributes:@{NSFontAttributeName:[UIFont boldSystemFontOfSize:boldTextFontSize]} range:range1]; [attributedText setAttributes:@{NSFontAttributeName:[UIFont boldSystemFontOfSize:boldTextFontSize]} range:range2]; myLabel.attributedText = attributedText;

对于Swift版本：请参见
我采用了疯狂酸奶对Swift扩展的回答

extension UILabel { func boldRange(_ range: Range<String.Index>) { if let text = self.attributedText { let attr = NSMutableAttributedString(attributedString: text) let start = text.string.characters.distance(from: text.string.startIndex, to: range.lowerBound) let length = text.string.characters.distance(from: range.lowerBound, to: range.upperBound) attr.addAttributes([NSFontAttributeName: UIFont.boldSystemFont(ofSize: self.font.pointSize)], range: NSMakeRange(start, length)) self.attributedText = attr } } func boldSubstring(_ substr: String) { if let text = self.attributedText { var range = text.string.range(of: substr) let attr = NSMutableAttributedString(attributedString: text) while range != nil { let start = text.string.characters.distance(from: text.string.startIndex, to: range!.lowerBound) let length = text.string.characters.distance(from: range!.lowerBound, to: range!.upperBound) var nsRange = NSMakeRange(start, length) let font = attr.attribute(NSFontAttributeName, at: start, effectiveRange: &nsRange) as! UIFont if !font.fontDescriptor.symbolicTraits.contains(.traitBold) { break } range = text.string.range(of: substr, options: NSString.CompareOptions.literal, range: range!.upperBound..<text.string.endIndex, locale: nil) } if let r = range { boldRange(r) } } } }
扩展UILabel{ func boldRange（range:range）{ 如果let text=self.attributedText{ 让attr=NSMutableAttributedString（attributedString:text）让start=text.string.characters.distance（从：text.string.startIndex到：range.lowerBound）让长度=text.string.characters.distance（从：range.lowerBound到：range.upperBound） attr.addAttributes（[NSFontAttributeName:UIFont.boldSystemFont（ofSize:self.font.pointSize）]，范围：NSMakeRange（开始，长度）） self.attributedText=attr } } func boldSubstring（substr:String）{ 如果let text=self.attributedText{ var range=text.string.range（of:substr）让attr=NSMutableAttributedString（attributedString:text）而射程！=零{ 让start=text.string.characters.distance（从：text.string.startIndex到：range！.lowerBound）让长度=text.string.characters.distance（从：range！.lowerBound到：range！.upperBound） var nsRange=NSMakeRange（开始，长度）将font=attr.attribute（NSFontAttributeName，at:start，effectiveRange:&nsRange）设为！UIFont 如果！font.fontDescriptor.symbolicTraits.contains（.traitBold）{ 打破 }
range=text.string.range（of:substr，options:NSString.CompareOptions.literal，range:range！.upperBound..不需要NSRange，我刚刚在我的项目中实现了以下代码（在Swift中）：

将UILabel中的文本加粗并加下划线。只需在代码中添加以下行

NSRange range1 = [lblTermsAndCondition.text rangeOfString:NSLocalizedString(@"bold_terms", @"")]; NSRange range2 = [lblTermsAndCondition.text rangeOfString:NSLocalizedString(@"bold_policy", @"")]; NSMutableAttributedString *attributedText = [[NSMutableAttributedString alloc] initWithString:lblTermsAndCondition.text]; [attributedText setAttributes:@{NSFontAttributeName:[UIFont fontWithName:fontBold size:12.0]} range:range1]; [attributedText setAttributes:@{NSFontAttributeName:[UIFont fontWithName:fontBold size:12.0]} range:range2]; [attributedText addAttribute:(NSString*)kCTUnderlineStyleAttributeName value:[NSNumber numberWithInt:kCTUnderlineStyleSingle] range:range1]; [attributedText addAttribute:(NSString*)kCTUnderlineStyleAttributeName value:[NSNumber numberWithInt:kCTUnderlineStyleSingle] range:range2]; lblTermsAndCondition.attributedText = attributedText;

希望这个能满足您的需要。提供要处理的字符串作为输入，并提供粗体/彩色的单词作为输入

func attributedString(parentString:String, arrayOfStringToProcess:[String], color:UIColor) -> NSAttributedString { let parentAttributedString = NSMutableAttributedString(string:parentString, attributes:nil) let parentStringWords = parentAttributedString.string.components(separatedBy: " ") if parentStringWords.count != 0 { let wordSearchArray = arrayOfStringToProcess.filter { inputArrayIndex in parentStringWords.contains(where: { $0 == inputArrayIndex } )} for eachWord in wordSearchArray { parentString.enumerateSubstrings(in: parentString.startIndex..<parentString.endIndex, options: .byWords) { (substring, substringRange, _, _) in if substring == eachWord { parentAttributedString.addAttribute(.font, value: UIFont.boldSystemFont(ofSize: 15), range: NSRange(substringRange, in: parentString)) parentAttributedString.addAttribute(.foregroundColor, value: color, range: NSRange(substringRange, in: parentString)) } } } } return parentAttributedString }

func attributedString（parentString:String，arrayOfStringToProcess:[String]，color:UIColor）->NSAttributedString { 让parentAttributedString=NSMutableAttributedString（字符串：parentString，属性：nil）让parentStringWords=parentAttributedString.string.components（分隔符：“”）如果parentStringWords.count！=0 { 让wordSearchArray=arrayOfStringToProcess.filter{inputArrayIndex in 包含（其中：{$0==inputArrayIndex} )} 对于wordSearchArray中的每个单词 { parentString.EnumerateSubstring（在：parentString.startIndex..Swift 4: // attribute with color red and Bold var attrs1 = [NSAttributedStringKey.font: UIFont.boldSystemFont(ofSize: 20), NSAttributedStringKey.foregroundColor: UIColor.red] // attribute with color black and Non Bold var attrs2 = [NSAttributedStringKey.font: UIFont(name: "Roboto-Regular", size: 20), NSAttributedStringKey.foregroundColor: UIColor.black] var color1 = NSAttributedString(string: "RED", attributes: attrs1) var color2 = NSAttributedString(string: " BLACK", attributes: attrs2) var string = NSMutableAttributedString() string.append(color1) string.append(color2) // print the text with **RED** BLACK print("Final String : \(string)") 我同意使用一次性替换（周围有一些）。苹果只是还没有完成他们在这方面的工作。除了作为一个学术练习之外，我认为不值得尝试去理解和实施这一混乱局面——可能一切都会很好 func attributedString(parentString:String, arrayOfStringToProcess:[String], color:UIColor) -> NSAttributedString { let parentAttributedString = NSMutableAttributedString(string:parentString, attributes:nil) let parentStringWords = parentAttributedString.string.components(separatedBy: " ") if parentStringWords.count != 0 { let wordSearchArray = arrayOfStringToProcess.filter { inputArrayIndex in parentStringWords.contains(where: { $0 == inputArrayIndex } )} for eachWord in wordSearchArray { parentString.enumerateSubstrings(in: parentString.startIndex..<parentString.endIndex, options: .byWords) { (substring, substringRange, _, _) in if substring == eachWord { parentAttributedString.addAttribute(.font, value: UIFont.boldSystemFont(ofSize: 15), range: NSRange(substringRange, in: parentString)) parentAttributedString.addAttribute(.foregroundColor, value: color, range: NSRange(substringRange, in: parentString)) } } } } return parentAttributedString } // attribute with color red and Bold var attrs1 = [NSAttributedStringKey.font: UIFont.boldSystemFont(ofSize: 20), NSAttributedStringKey.foregroundColor: UIColor.red] // attribute with color black and Non Bold var attrs2 = [NSAttributedStringKey.font: UIFont(name: "Roboto-Regular", size: 20), NSAttributedStringKey.foregroundColor: UIColor.black] var color1 = NSAttributedString(string: "RED", attributes: attrs1) var color2 = NSAttributedString(string: " BLACK", attributes: attrs2) var string = NSMutableAttributedString() string.append(color1) string.append(color2) // print the text with **RED** BLACK print("Final String : \(string)")