有没有办法只加粗字符串的一部分? 例如:
近似距离: 120米远
谢谢!
答案 0 :(得分:95)
NSString *boldFontName = [[UIFont boldSystemFontOfSize:12] fontName];
NSString *yourString = ...;
NSRange boldedRange = NSMakeRange(22, 4);
NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] initWithString:yourString];
[attrString beginEditing];
[attrString addAttribute:kCTFontAttributeName
value:boldFontName
range:boldedRange];
[attrString endEditing];
//draw attrString here...
查看NSAttributedString
以使用核心文字绘制NSAttributedString
个对象。
答案 1 :(得分:60)
正如雅各布所说,你可能想要使用NSAttributedString
或NSMutableAttributedString
。以下是如何执行此操作的一个示例。
NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithString:@"Approximate Distance: 120m away"];
NSRange selectedRange = NSMakeRange(22, 4); // 4 characters, starting at index 22
[string beginEditing];
[string addAttribute:NSFontAttributeName
value:[NSFont fontWithName:@"Helvetica-Bold" size:12.0]
range:selectedRange];
[string endEditing];
答案 2 :(得分:11)
如果您不想打扰字体(因为并非字体的每个变体都包含" Bold"),这是另一种方法。请注意,目前仅适用于OS X ...:
NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] initWithString:"Approximate Distance: 120m away"];
[attrString beginEditing];
[attrString applyFontTraits:NSBoldFontMask
range:NSMakeRange(22, 4)];
[attrString endEditing];
答案 3 :(得分:6)
上面的代码让我在使用这个referencedString创建UILabel时崩溃。
我使用了这段代码并且有效:
NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] initWithString:string];
NSRange boldedRange = NSMakeRange(0, 1);
UIFont *fontText = [UIFont systemFontOfSize:12]; //[UIFont fontWithName:@"Lato-Bold" size:12];
NSDictionary *dictBoldText = [NSDictionary dictionaryWithObjectsAndKeys:fontText, NSFontAttributeName, nil];
[attrString setAttributes:dictBoldText range:boldedRange];
答案 4 :(得分:4)
<强>夫特强>
还包括获取要动态增强的字符串范围
let nameString = "Magoo"
let string = "Hello my name is \(nameString)"
let attributes = [NSFontAttributeName:UIFont.systemFontOfSize(14.0),NSForegroundColorAttributeName: UIColor.black]
let boldAttribute = [NSFontAttributeName:UIFont.boldSystemFontOfSize(14.0)]
let attributedString = NSMutableAttributedString(string: string, attributes: attributes)
let nsString = NSString(string: string)
let range = nsString.rangeOfString(nameString)
if range.length > 0 { attributedString.setAttributes(boldAttribute, range: range) }
someLabel.attributedText = attributedString
答案 5 :(得分:4)
要粗体化字符串而不对其字体进行硬编码,可以使用带有负值的StrokeWidth属性:
let s = NSMutableAttributedString(string: "Approximate Distance: 120m away")
s.addAttribute(NSStrokeWidthAttributeName, value: NSNumber(value: -3.0), range: NSRange(22..<26))
答案 6 :(得分:3)
NSString
只是一个数据容器。它不包含有关演示问题的任何详细信息。
听起来你可能想要做的是用于显示你的字符串的UILabel
的粗体部分。我不认为你能做到。但你总是可以将用户界面分成三个标签,一个用于“近似距离:”,一个用于“ 120米”,一个用于“离开”。将它们放在一起,你应该得到所需的效果。
另一种选择可能是使用UIWebView
和一点标记来显示带有嵌入格式信息的字符串,如下所述:
http://iphoneincubator.com/blog/windows-views/display-rich-text-using-a-uiwebview
答案 7 :(得分:2)
在Xamarin ios中,您可以通过这种方式加强NSString的一部分:
public static NSMutableAttributedString BoldRangeOfString (string str, float fontSize, int startRange, int lengthRange)
{
var firstAttributes = new UIStringAttributes {
Font = UIFont.BoldSystemFontOfSize(fontSize)
};
NSMutableAttributedString boldString = new NSMutableAttributedString (str);
boldString.SetAttributes (firstAttributes.Dictionary, new NSRange (startRange, lengthRange));
return boldString;
}
并调用此方法:
myLabel = new UILabel ();
...
myLabel.AttributedText = BoldRangeOfString("my text", fontSize, startRange, lengthRange);
答案 8 :(得分:2)
我联系了@Jacob Relkin和@Andrew Marin的答案,否则,我得到了崩溃。以下是iOS9的答案:
UIFont *boldFont = [UIFont boldSystemFontOfSize:12];
NSString *yourString = @"Approximate Distance: 120m away";
NSRange boldedRange = NSMakeRange(22, 4);
NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] initWithString:yourString];
[attrString beginEditing];
[attrString addAttribute:NSFontAttributeName
value:boldFont
range:boldedRange];
[attrString endEditing];
答案 9 :(得分:1)
使用Swift5 +的更短的方式
let labelNotes = UILabel() //or UITextView(), etc...
let attributedNotes = NSMutableAttributedString(string: "Bold: some stuff not bold")
attributedNotes.addAttribute(NSAttributedString.Key.font, value: UIFont.boldSystemFont(ofSize: 14), range: NSRange(location: 0, length: 5))
labelNotes.attributedText = attributedNotes
答案 10 :(得分:0)
如果您不想对字体或/和大小进行硬编码,请尝试以下代码以粗体显示完整字符串:
NSMutableAttributedString *myString = [[NSMutableAttributedString alloc] initWithString:mainString];
[myString beginEditing];
[myString addAttribute:NSStrokeWidthAttributeName
value:[[NSNumber alloc] initWithInt: -3.f]
range:NSMakeRange(0, [mainString length])];
[myString endEditing];