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。
当前回答
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。
其他回答
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。
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];
}
}];
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)
}
