大胆的,单个UILabel中的非粗体文本?

更新

在Swift中，我们不需要处理iOS5的旧东西，除了语法更短，所以一切都变得非常简单:

< >强劲迅速5 < / >强

func attributedString(from string: String, nonBoldRange: NSRange?) -> NSAttributedString {
let fontSize = UIFont.systemFontSize
let attrs = [
NSAttributedString.Key.font: UIFont.boldSystemFont(ofSize: fontSize),
NSAttributedString.Key.foregroundColor: UIColor.black
]
let nonBoldAttribute = [
NSAttributedString.Key.font: UIFont.systemFont(ofSize: fontSize),
]
let attrStr = NSMutableAttributedString(string: string, attributes: attrs)
if let range = nonBoldRange {
attrStr.setAttributes(nonBoldAttribute, range: range)
}
return attrStr
}

< >强劲迅速3 < / >强

func attributedString(from string: String, nonBoldRange: NSRange?) -> NSAttributedString {
let fontSize = UIFont.systemFontSize
let attrs = [
NSFontAttributeName: UIFont.boldSystemFont(ofSize: fontSize),
NSForegroundColorAttributeName: UIColor.black
]
let nonBoldAttribute = [
NSFontAttributeName: UIFont.systemFont(ofSize: fontSize),
]
let attrStr = NSMutableAttributedString(string: string, attributes: attrs)
if let range = nonBoldRange {
attrStr.setAttributes(nonBoldAttribute, range: range)
}
return attrStr
}

< >强用法:< / >强

let targetString = "Updated 2012/10/14 21:59 PM"
let range = NSMakeRange(7, 12)


let label = UILabel(frame: CGRect(x:0, y:0, width:350, height:44))
label.backgroundColor = UIColor.white
label.attributedText = attributedString(from: targetString, nonBoldRange: range)
label.sizeToFit()

好处:国际化

一些人谈到了国际化。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)

结果(假设英语和日语本地化。字符串是可用的)

之前的iOS6和更高版本的答案(Objective-C仍然有效):

在iOS6中，UILabel， UIButton， UITextView， UITextField支持带属性字符串，这意味着我们不需要为带属性字符串创建__abc4作为接收方。此外，为了创建带属性的字符串，我们不再需要使用CoreText:)我们在obj-c Foundation.framework中有新的类，如NSParagraphStyle和其他常数，这将使我们的工作更容易。耶!

如果我们有这个字符串:

NSString *text = @"Updated: 2012/10/14 21:59"

我们只需要创建带属性的字符串:

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];
}

有一些很好的介绍性博客文章在这里来自invasivecode的人，他们用更多的例子解释了NSAttributedString的用法，寻找NSAttributedString for iOS 6简介;和使用Interface builder的iOS带属性字符串;:)

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

使用带有NSAttributedString的CATextLayer !比2 uilabel更轻更简单。(iOS 3.2及以上版本)

的例子。

不要忘记添加QuartzCore框架(calayer需要)和CoreText(带属性的字符串需要)。

#import <QuartzCore/QuartzCore.h>
#import <CoreText/CoreText.h>

下面的例子将在导航控制器的工具栏中添加一个子图层。à la Mail。iPhone中的应用程序。：）

- (void)setRefreshDate:(NSDate *)aDate
{
[aDate retain];
[refreshDate release];
refreshDate = aDate;


if (refreshDate) {


/* Create the text for the text layer*/
NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:@"MM/dd/yyyy hh:mm"];


NSString *dateString = [df stringFromDate:refreshDate];
NSString *prefix = NSLocalizedString(@"Updated", nil);
NSString *text = [NSString stringWithFormat:@"%@: %@",prefix, dateString];
[df release];


/* Create the text layer on demand */
if (!_textLayer) {
_textLayer = [[CATextLayer alloc] init];
//_textLayer.font = [UIFont boldSystemFontOfSize:13].fontName; // not needed since `string` property will be an NSAttributedString
_textLayer.backgroundColor = [UIColor clearColor].CGColor;
_textLayer.wrapped = NO;
CALayer *layer = self.navigationController.toolbar.layer; //self is a view controller contained by a navigation controller
_textLayer.frame = CGRectMake((layer.bounds.size.width-180)/2 + 10, (layer.bounds.size.height-30)/2 + 10, 180, 30);
_textLayer.contentsScale = [[UIScreen mainScreen] scale]; // looks nice in retina displays too :)
_textLayer.alignmentMode = kCAAlignmentCenter;
[layer addSublayer:_textLayer];
}


/* Create the attributes (for the attributed string) */
CGFloat fontSize = 13;
UIFont *boldFont = [UIFont boldSystemFontOfSize:fontSize];
CTFontRef ctBoldFont = CTFontCreateWithName((CFStringRef)boldFont.fontName, boldFont.pointSize, NULL);
UIFont *font = [UIFont systemFontOfSize:13];
CTFontRef ctFont = CTFontCreateWithName((CFStringRef)font.fontName, font.pointSize, NULL);
CGColorRef cgColor = [UIColor whiteColor].CGColor;
NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:
(id)ctBoldFont, (id)kCTFontAttributeName,
cgColor, (id)kCTForegroundColorAttributeName, nil];
CFRelease(ctBoldFont);
NSDictionary *subAttributes = [NSDictionary dictionaryWithObjectsAndKeys:(id)ctFont, (id)kCTFontAttributeName, nil];
CFRelease(ctFont);


/* Create the attributed string (text + attributes) */
NSMutableAttributedString *attrStr = [[NSMutableAttributedString alloc] initWithString:text attributes:attributes];
[attrStr addAttributes:subAttributes range:NSMakeRange(prefix.length, 12)]; //12 is the length of " MM/dd/yyyy/ "


/* Set the attributes string in the text layer :) */
_textLayer.string = attrStr;
[attrStr release];


_textLayer.opacity = 1.0;
} else {
_textLayer.opacity = 0.0;
_textLayer.string = nil;
}
}

查看TTTAttributedLabel。它是UILabel的一个替换，它允许你在一个标签中混合字体和颜色，通过设置NSAttributedString作为标签的文本。

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)];

试试UILabel上的分类:

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;

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];
}

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

在这种情况下，你可以尝试，

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];

这是基于bbrame的category的category。它的工作原理类似，但允许您在累积结果中多次加粗相同的UILabel。

UILabel + Boldify.h

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

UILabel + Boldify.m

@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

有了这个修正，你可以多次使用它，例如:

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

将得到:"更新: 2012/10/14 21:59点"。

如果您希望更容易地使用带属性字符串，请尝试使用带属性字符串创建者，它将为您生成代码。https://itunes.apple.com/us/app/attributed-string-creator/id730928349

这在界面构建器中很容易做到:

1)在属性检查器中创建UILabel 由于

.

3)在字体选择器中更改其字体(或相同字体的粗体)

这是所有!

这招对我很管用:

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;

Swift版本:参见在这里

我采用了疯狂酸奶对斯威夫特扩展的回答。

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)
}
}
}
}

可能在Range和NSRange之间没有很好的转换，但我没有发现更好的东西。

我刚刚在我的项目中实现的以下代码不需要NSRange(在Swift中):

//Code sets label (yourLabel)'s text to "Tap and hold(BOLD) button to start recording."
let boldAttribute = [
//You can add as many attributes as you want here.
NSFontAttributeName: UIFont(name: "HelveticaNeue-Bold", size: 18.0)!
]
        

let regularAttribute = [NSFontAttributeName: UIFont(name: "HelveticaNeue-Light", size: 18.0)!]
        

let beginningAttributedString = NSAttributedString(string: "Tap and ", attributes: regularAttribute )
let boldAttributedString = NSAttributedString(string: "hold ", attributes: boldAttribute)
let endAttributedString = NSAttributedString(string: "button to start recording.", attributes: regularAttribute )
let fullString =  NSMutableAttributedString()
        

fullString.appendAttributedString(beginningAttributedString)
fullString.appendAttributedString(boldAttributedString)
fullString.appendAttributedString(endAttributedString)


yourLabel.attributedText = fullString

在UILabel中使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;

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
}

斯威夫特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)")

AttributeString构造函数,把马克字符串,这样做可能意味着你的属性字符串没有其他属性,因此,如果您使用的是xib,你可以没有大胆的文本,将所有你想要的其他属性,然后通过属性在代码中列举范围你记下的字符串,并将它们应用于带属性字符串从你xib文件,然后重新申请你认为AttributeString特定领域。