如何在uiLabel中同时包含粗体和非粗体文本?
我宁愿不用UIWebView..我也读过这个可能使用NSAttributedString但我不知道如何使用它。什么好主意吗?
苹果在他们的几个应用程序中实现了这一点; 例子截图:
谢谢! ——Dom
如何在uiLabel中同时包含粗体和非粗体文本?
我宁愿不用UIWebView..我也读过这个可能使用NSAttributedString但我不知道如何使用它。什么好主意吗?
苹果在他们的几个应用程序中实现了这一点; 例子截图:
谢谢! ——Dom
当前回答
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
}
其他回答
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。
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
检查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。
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 h +及。
@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"];
将会得到:“更新日期:2012/10/14 21:59 PM”。