在UITextView中使超链接可点击是很简单的。您只需在IB中的视图上设置“检测链接”复选框，它就会检测HTTP链接并将其转换为超链接。
然而，这仍然意味着用户看到的是“原始”链接。RTF文件和HTML都允许你设置一个用户可读的字符串，“后面”有一个链接。
将带属性的文本安装到文本视图(或UILabel或UITextField)是很容易的。但是，当带有属性的文本包含链接时，它是不可点击的。
是否有一种方法使用户可读的文本点击在UITextView, UILabel或UITextField?
在SO上的标记是不同的，但这里是大致的思想。我想要的是这样的文本:
这个变形是由Face Dancer生成的，点击在应用程序商店中查看。
我唯一能得到的是:
这个变形是由Face Dancer生成的，点击http://example.com/facedancer在应用商店中查看。
使用NSMutableAttributedString。
NSMutableAttributedString * str = [[NSMutableAttributedString alloc] initWithString:@"Google"];
[str addAttribute: NSLinkAttributeName value: @"http://www.google.com" range: NSMakeRange(0, str.length)];
yourTextView.attributedText = str;
编辑:
这不是直接关于这个问题，只是澄清一下，UITextField和UILabel不支持打开url。如果你想使用UILabel链接，你可以检查TTTAttributedLabel。
此外，你应该设置你的UITextView的dataDetectorTypes值为UIDataDetectorTypeLink或UIDataDetectorTypeAll以在单击时打开url。或者你也可以按照评论中的建议使用委托方法。
对ujell的解决方案的微小改进:如果你使用NSURL而不是NSString，你可以使用任何URL(例如自定义URL)
NSURL *URL = [NSURL URLWithString: @"whatsapp://app"];
NSMutableAttributedString * str = [[NSMutableAttributedString alloc] initWithString:@"start Whatsapp"];
[str addAttribute: NSLinkAttributeName value:URL range: NSMakeRange(0, str.length)];
yourTextField.attributedText = str;
玩得开心!
我发现这真的很有用，但我需要在相当多的地方这样做，所以我已经包装了我的方法在一个简单的扩展到NSMutableAttributedString:
斯威夫特3
extension NSMutableAttributedString {
public func setAsLink(textToFind:String, linkURL:String) -> Bool {
let foundRange = self.mutableString.range(of: textToFind)
if foundRange.location != NSNotFound {
self.addAttribute(.link, value: linkURL, range: foundRange)
return true
}
return false
}
}
斯威夫特2
import Foundation
extension NSMutableAttributedString {
public func setAsLink(textToFind:String, linkURL:String) -> Bool {
let foundRange = self.mutableString.rangeOfString(textToFind)
if foundRange.location != NSNotFound {
self.addAttribute(NSLinkAttributeName, value: linkURL, range: foundRange)
return true
}
return false
}
}
使用示例:
let attributedString = NSMutableAttributedString(string:"I love stackoverflow!")
let linkWasSet = attributedString.setAsLink("stackoverflow", linkURL: "http://stackoverflow.com")
if linkWasSet {
// adjust more attributedString properties
}
objective - c
我只是满足了在纯Objective-C项目中做同样事情的要求，这里是Objective-C类别。
@interface NSMutableAttributedString (SetAsLinkSupport)
- (BOOL)setAsLink:(NSString*)textToFind linkURL:(NSString*)linkURL;
@end
@implementation NSMutableAttributedString (SetAsLinkSupport)
- (BOOL)setAsLink:(NSString*)textToFind linkURL:(NSString*)linkURL {
NSRange foundRange = [self.mutableString rangeOfString:textToFind];
if (foundRange.location != NSNotFound) {
[self addAttribute:NSLinkAttributeName value:linkURL range:foundRange];
return YES;
}
return NO;
}
@end
使用示例:
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:"I love stackoverflow!"];
BOOL linkWasSet = [attributedString setAsLink:@"stackoverflow" linkURL:@"http://stackoverflow.com"];
if (linkWasSet) {
// adjust more attributedString properties
}
确保NSTextField的Behavior属性被设置为Selectable。
使用UITextView它支持可点击链接。 使用以下代码创建带属性的字符串
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:strSomeTextWithLinks];
然后设置UITextView text，如下所示
NSDictionary *linkAttributes = @{NSForegroundColorAttributeName: [UIColor redColor],
NSUnderlineColorAttributeName: [UIColor blueColor],
NSUnderlineStyleAttributeName: @(NSUnderlinePatternSolid)};
customTextView.linkTextAttributes = linkAttributes; // customizes the appearance of links
textView.attributedText = attributedString;
确保你在XIB中启用了UITextView的“可选”行为。
我也有类似的需求，最初我使用UILabel，然后我意识到UITextView更好。我使UITextView行为像UILabel通过禁用交互和滚动，并为NSMutableAttributedString做了一个类别方法来设置链接到文本，就像Karl所做的一样(+1)这是我的obj c版本
-(void)setTextAsLink:(NSString*) textToFind withLinkURL:(NSString*) url
{
NSRange range = [self.mutableString rangeOfString:textToFind options:NSCaseInsensitiveSearch];
if (range.location != NSNotFound) {
[self addAttribute:NSLinkAttributeName value:url range:range];
[self addAttribute:NSForegroundColorAttributeName value:[UIColor URLColor] range:range];
}
}
您可以使用下面的委托来处理该操作
- (BOOL)textView:(UITextView *)textView shouldInteractWithURL:(NSURL *)url inRange:(NSRange)characterRange
{
// do the task
return YES;
}
我的问题的核心是，我希望能够在文本视图/字段/标签中创建可点击的链接，而不必编写自定义代码来操作文本和添加链接。我希望它是数据驱动的。
我终于知道该怎么做了。问题是IB不支持嵌入链接。
此外，NSAttributedString的iOS版本不允许你初始化RTF文件中的带属性字符串。OS X版本的NSAttributedString确实有一个初始化式，它接受一个RTF文件作为输入。
NSAttributedString符合nsscoding协议，所以你可以把它转换成/从NSData
我创建了一个OS X命令行工具，它以RTF文件作为输入，并输出一个扩展名为.data的文件，其中包含来自NSCoding的NSData。然后，我将.data文件放入我的项目中，并添加了几行将文本加载到视图中的代码。代码看起来像这样(这个项目是在Swift中):
/*
If we can load a file called "Dates.data" from the bundle and convert it to an attributed string,
install it in the dates field. The contents contain clickable links with custom URLS to select
each date.
*/
if
let datesPath = NSBundle.mainBundle().pathForResource("Dates", ofType: "data"),
let datesString = NSKeyedUnarchiver.unarchiveObjectWithFile(datesPath) as? NSAttributedString
{
datesField.attributedText = datesString
}
对于使用大量格式化文本的应用程序，我创建了一个构建规则，告诉Xcode给定文件夹中的所有.rtf文件都是源文件，.data文件是输出文件。一旦我这样做了，我只需将.rtf文件添加到指定的目录，(或编辑现有文件)，构建过程就会发现它们是新的/更新的，运行命令行工具，并将文件复制到应用程序包中。它工作得很好。
我写了一篇博客文章，链接到一个示例(Swift)项目，演示了这项技术。你可以在这里看到:
在应用中打开的UITextField中创建可点击的url
我只是创建了UILabel的一个子类来专门处理这样的用例。您可以轻松地添加多个链接并为它们定义不同的处理程序。它还支持突出显示按下的链接时，你触摸触摸反馈。请参考https://github.com/null09264/FRHyperLabel。
在你的例子中，代码可能是这样的:
FRHyperLabel *label = [FRHyperLabel new];
NSString *string = @"This morph was generated with Face Dancer, Click to view in the app store.";
NSDictionary *attributes = @{NSFontAttributeName: [UIFont preferredFontForTextStyle:UIFontTextStyleHeadline]};
label.attributedText = [[NSAttributedString alloc]initWithString:string attributes:attributes];
[label setLinkForSubstring:@"Face Dancer" withLinkHandler:^(FRHyperLabel *label, NSString *substring){
[[UIApplication sharedApplication] openURL:aURL];
}];
示例截图(在这种情况下，处理程序被设置为弹出警报而不是打开url)
斯威夫特4:
var string = "Google"
var attributedString = NSMutableAttributedString(string: string, attributes:[NSAttributedStringKey.link: URL(string: "http://www.google.com")!])
yourTextView.attributedText = attributedString
斯威夫特3.1:
var string = "Google"
var attributedString = NSMutableAttributedString(string: string, attributes:[NSLinkAttributeName: URL(string: "http://www.google.com")!])
yourTextView.attributedText = attributedString
我写了一个方法，添加一个链接(linkString)到一个字符串(fullString)与特定的url(urlString):
- (NSAttributedString *)linkedStringFromFullString:(NSString *)fullString withLinkString:(NSString *)linkString andUrlString:(NSString *)urlString
{
NSRange range = [fullString rangeOfString:linkString options:NSLiteralSearch];
NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:fullString];
NSMutableParagraphStyle *paragraphStyle = NSMutableParagraphStyle.new;
paragraphStyle.alignment = NSTextAlignmentCenter;
NSDictionary *attributes = @{NSForegroundColorAttributeName:RGB(0x999999),
NSFontAttributeName:[UIFont fontWithName:@"HelveticaNeue-Light" size:10],
NSParagraphStyleAttributeName:paragraphStyle};
[str addAttributes:attributes range:NSMakeRange(0, [str length])];
[str addAttribute: NSLinkAttributeName value:urlString range:range];
return str;
}
你应该这样称呼它:
NSString *fullString = @"A man who bought the Google.com domain name for $12 and owned it for about a minute has been rewarded by Google for uncovering the flaw.";
NSString *linkString = @"Google.com";
NSString *urlString = @"http://www.google.com";
_youTextView.attributedText = [self linkedStringFromFullString:fullString withLinkString:linkString andUrlString:urlString];
来自@AliSoftware OHAttributedStringAdditions的优秀库可以很容易地在UILabel中添加链接，这里是文档:https://github.com/AliSoftware/OHAttributedStringAdditions/wiki/link-in-UILabel
更新:
我的问题有两个关键部分:
如何创建一个链接，其中显示的可点击链接的文本与被调用的实际链接不同: 如何在不使用自定义代码设置文本属性的情况下设置链接。
iOS 7增加了从NSData中加载属性文本的功能。
我创建了一个UITextView的自定义子类，它利用了@IBInspectable属性，让你直接在IB中加载RTF文件中的内容。
以下是细节:
In iOS 7, NSAttributedString gained the method initWithData:options:documentAttributes:error:. That method lets you load an NSAttributedString from an NSData object. You can first load an RTF file into NSData, then use initWithData:options:documentAttributes:error: to load that NSData into your text view. (Note that there is also a method initWithFileURL:options:documentAttributes:error: that will load an attributed string directly from a file, but that method was deprecated in iOS 9. It's safer to use the method initWithData:options:documentAttributes:error:, which wasn't deprecated.
我想要一种方法，让我安装可点击的链接到我的文本视图，而不必创建任何特定于我正在使用的链接的代码。
我想出的解决方案是创建一个UITextView的自定义子类，我调用RTF_UITextView并给它一个名为RTF_Filename的@IBInspectable属性。将@IBInspectable属性添加到属性中会导致接口构建器在“属性检查器”中公开该属性。然后，您可以从IB设置该值，而无需自定义代码。
I also added an @IBDesignable attribute to my custom class. The @IBDesignable attribute tells Xcode that it should install a running copy of your custom view class into Interface builder so you can see it in the graphical display of your view hierarchy. ()Unfortunately, for this class, the @IBDesignable property seems to be flaky. It worked when I first added it, but then I deleted the plain text contents of my text view and the clickable links in my view went away and I have not been able to get them back.)
RTF_UITextView的代码非常简单。除了添加@IBDesignable属性和@IBInspectable属性的RTF_Filename属性外，我还添加了一个didSet()方法到RTF_Filename属性。当RTF_Filename属性的值发生变化时，didSet()方法将被调用。didSet()方法的代码非常简单:
@IBDesignable
class RTF_UITextView: UITextView
{
@IBInspectable
var RTF_Filename: String?
{
didSet(newValue)
{
//If the RTF_Filename is nil or the empty string, don't do anything
if ((RTF_Filename ?? "").isEmpty)
{
return
}
//Use optional binding to try to get an URL to the
//specified filename in the app bundle. If that succeeds, try to load
//NSData from the file.
if let fileURL = NSBundle.mainBundle().URLForResource(RTF_Filename, withExtension: "rtf"),
//If the fileURL loads, also try to load NSData from the URL.
let theData = NSData(contentsOfURL: fileURL)
{
var aString:NSAttributedString
do
{
//Try to load an NSAttributedString from the data
try
aString = NSAttributedString(data: theData,
options: [:],
documentAttributes: nil
)
//If it succeeds, install the attributed string into the field.
self.attributedText = aString;
}
catch
{
print("Nerp.");
}
}
}
}
}
注意，如果@IBDesignable属性不能可靠地让你在Interface builder中预览样式文本，那么将上述代码设置为UITextView的扩展而不是自定义子类可能会更好。这样，您就可以在任何文本视图中使用它，而不必将文本视图更改为自定义类。
如果你需要支持iOS 7之前的iOS版本，请参阅我的其他答案。
你可以从gitHub下载一个包含这个新类的示例项目:
Github上的DatesInSwift演示项目
一个快速增加邓肯C的原始描述-á-vie IB行为。他写道:“在UITextView中创建可点击的超链接很简单。你只需在IB的视图上设置“检测链接”复选框，它就会检测http链接并将它们转换为超链接。”
我的经验(至少在xcode 7)是，你还必须取消“可编辑”行为的url被检测和可点击。
Swift版本:
// Attributed String for Label
let plainText = "Apkia"
let styledText = NSMutableAttributedString(string: plainText)
// Set Attribuets for Color, HyperLink and Font Size
let attributes = [NSFontAttributeName: UIFont.systemFontOfSize(14.0), NSLinkAttributeName:NSURL(string: "http://apkia.com/")!, NSForegroundColorAttributeName: UIColor.blueColor()]
styledText.setAttributes(attributes, range: NSMakeRange(0, plainText.characters.count))
registerLabel.attributedText = styledText
我需要继续使用一个纯的UILabel，所以从我的点击识别器称为这(这是基于malex的响应在这里:字符索引在触摸点UILabel)
UILabel* label = (UILabel*)gesture.view;
CGPoint tapLocation = [gesture locationInView:label];
// create attributed string with paragraph style from label
NSMutableAttributedString* attr = [label.attributedText mutableCopy];
NSMutableParagraphStyle* paragraphStyle = [NSMutableParagraphStyle new];
paragraphStyle.alignment = label.textAlignment;
[attr addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, label.attributedText.length)];
// init text storage
NSTextStorage *textStorage = [[NSTextStorage alloc] initWithAttributedString:attr];
NSLayoutManager *layoutManager = [[NSLayoutManager alloc] init];
[textStorage addLayoutManager:layoutManager];
// init text container
NSTextContainer *textContainer = [[NSTextContainer alloc] initWithSize:CGSizeMake(label.frame.size.width, label.frame.size.height+100) ];
textContainer.lineFragmentPadding = 0;
textContainer.maximumNumberOfLines = label.numberOfLines;
textContainer.lineBreakMode = label.lineBreakMode;
[layoutManager addTextContainer:textContainer];
// find tapped character
NSUInteger characterIndex = [layoutManager characterIndexForPoint:tapLocation
inTextContainer:textContainer
fractionOfDistanceBetweenInsertionPoints:NULL];
// process link at tapped character
[attr enumerateAttributesInRange:NSMakeRange(characterIndex, 1)
options:0
usingBlock:^(NSDictionary<NSString *,id> * _Nonnull attrs, NSRange range, BOOL * _Nonnull stop) {
if (attrs[NSLinkAttributeName]) {
NSString* urlString = attrs[NSLinkAttributeName];
NSURL* url = [NSURL URLWithString:urlString];
[[UIApplication sharedApplication] openURL:url];
}
}];
如果你想在UITextView中使用NSLinkAttributeName，那么你可以考虑使用AttributedTextView库。它是一个UITextView子类，它让处理这些变得很容易。更多信息请参见:https://github.com/evermeer/AttributedTextView
你可以让文本的任何部分像这样交互(其中textView1是一个UITextView IBoutlet):
textView1.attributer =
"1. ".red
.append("This is the first test. ").green
.append("Click on ").black
.append("evict.nl").makeInteract { _ in
UIApplication.shared.open(URL(string: "http://evict.nl")!, options: [:], completionHandler: { completed in })
}.underline
.append(" for testing links. ").black
.append("Next test").underline.makeInteract { _ in
print("NEXT")
}
.all.font(UIFont(name: "SourceSansPro-Regular", size: 16))
.setLinkColor(UIColor.purple)
为了处理标签和提及，你可以使用这样的代码:
textView1.attributer = "@test: What #hashtags do we have in @evermeer #AtributedTextView library"
.matchHashtags.underline
.matchMentions
.makeInteract { link in
UIApplication.shared.open(URL(string: "https://twitter.com\(link.replacingOccurrences(of: "@", with: ""))")!, options: [:], completionHandler: { completed in })
}
如果你想在你的UITextView活动子字符串，那么你可以使用我的扩展TextView…它简短而简单。你可以随意编辑。
结果:
代码: https://github.com/marekmand/ActiveSubstringTextView
Swift 3的例子，以检测对属性文本点击的动作
https://stackoverflow.com/a/44226491/5516830
let termsAndConditionsURL = TERMS_CONDITIONS_URL;
let privacyURL = PRIVACY_URL;
override func viewDidLoad() {
super.viewDidLoad()
self.txtView.delegate = self
let str = "By continuing, you accept the Terms of use and Privacy policy"
let attributedString = NSMutableAttributedString(string: str)
var foundRange = attributedString.mutableString.range(of: "Terms of use") //mention the parts of the attributed text you want to tap and get an custom action
attributedString.addAttribute(NSLinkAttributeName, value: termsAndConditionsURL, range: foundRange)
foundRange = attributedString.mutableString.range(of: "Privacy policy")
attributedString.addAttribute(NSLinkAttributeName, value: privacyURL, range: foundRange)
txtView.attributedText = attributedString
}
func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange) -> Bool {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "WebView") as! SKWebViewController
if (URL.absoluteString == termsAndConditionsURL) {
vc.strWebURL = TERMS_CONDITIONS_URL
self.navigationController?.pushViewController(vc, animated: true)
} else if (URL.absoluteString == privacyURL) {
vc.strWebURL = PRIVACY_URL
self.navigationController?.pushViewController(vc, animated: true)
}
return false
}
同样，你可以用shouldInteractWith URLUITextFieldDelegate方法添加任何你想要的动作。
干杯! !
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:strSomeTextWithLinks];
NSDictionary *linkAttributes = @{NSForegroundColorAttributeName: [UIColor redColor],
NSUnderlineColorAttributeName: [UIColor blueColor],
NSUnderlineStyleAttributeName: @(NSUnderlinePatternSolid)};
customTextView.linkTextAttributes = linkAttributes; // customizes the appearance of links
textView.attributedText = attributedString;
重点:
确保你在XIB中启用了UITextView的“可选”行为。 确保你在XIB中禁用了UITextView的“可编辑”行为。
使用UITextView并为Link设置dataDetectorTypes。
是这样的:
testTextView.editable = false
testTextView.dataDetectorTypes = .link
如果你想检测链接，电话号码，地址等
testTextView.dataDetectorTypes = .all
如果你有@Karl Nosworthy和@esilver上面提供的问题，我已经更新了NSMutableAttributedString扩展到它的Swift 4版本。
extension NSMutableAttributedString {
public func setAsLink(textToFind:String, linkURL:String) -> Bool {
let foundRange = self.mutableString.range(of: textToFind)
if foundRange.location != NSNotFound {
_ = NSMutableAttributedString(string: textToFind)
// Set Attribuets for Color, HyperLink and Font Size
let attributes = [NSFontAttributeName: UIFont.bodyFont(.regular, shouldResize: true), NSLinkAttributeName:NSURL(string: linkURL)!, NSForegroundColorAttributeName: UIColor.blue]
self.setAttributes(attributes, range: foundRange)
return true
}
return false
}
}
快速的答案是使用UITextView而不是UILabel。您需要启用可选择和禁用可编辑。
然后禁用滚动指示器和反弹。
我的解决方案使用NSMutableAttributedString从html字符串NSHTMLTextDocumentType
NSString *s = @"<p><a href='https://itunes.apple.com/us/app/xxxx/xxxx?mt=8'>https://itunes.apple.com/us/app/xxxx/xxxx?mt=8</a></p>";
NSMutableAttributedString *text = [[NSMutableAttributedString alloc]
initWithData: [s dataUsingEncoding:NSUnicodeStringEncoding]
options: @{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType }
documentAttributes: nil
error: nil
];
cell.content.attributedText = text;
在Swift 5.5中
自从Swift 5.5以来，NSAttributedString是完全可本地化的，甚至不需要定义字符的数量就很容易使用。
func attributedStringBasics(important: Bool) {
var buy = AttributedString("Buy a new iPhone!")
buy.font = .body.bold()
var website = AttributedString("Visit Apple")
website.font = .body.italic()
website.link = URL(string: "http://www.apple.com")
var container = AttributeContainer()
if important {
container.foregroundColor = .red
container.underlineColor = .primary
} else {
container.foregroundColor = .primary
}
buy.mergeAttributes(container)
website.mergeAttributes(container)
print(buy)
print(website)
}
