我有以下代码，但我的链接总是蓝色的。我该如何改变它们的颜色？
[_string addAttribute:NSLinkAttributeName value:tag range:NSMakeRange(position, length)];
[_string addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"HelveticaNeue-Bold" size:(12.0)] range:NSMakeRange(position, length)];
[_string addAttribute:NSStrokeColorAttributeName value:[UIColor greenColor] range:NSMakeRange(position, length)];
_字符串是一个NSMutableAttributedString，位置和长度工作正常。
Swift
更新为Swift 4.2
将linkTextAttributes与UITextView 一起使用
textView.linkTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.green]
在上下文中：
let attributedString = NSMutableAttributedString(string: "The site is www.google.com.")
let linkRange = (attributedString.string as NSString).range(of: "www.google.com")
attributedString.addAttribute(NSAttributedString.Key.link, value: "https://www.google.com", range: linkRange)
let linkAttributes: [NSAttributedString.Key : Any] = [
NSAttributedString.Key.foregroundColor: UIColor.green,
NSAttributedString.Key.underlineColor: UIColor.lightGray,
NSAttributedString.Key.underlineStyle: NSUnderlineStyle.single.rawValue
]
// textView is a UITextView
textView.linkTextAttributes = linkAttributes
textView.attributedText = attributedString
目标-C
将linkTextAttributes与UITextView 一起使用
textView.linkTextAttributes = @{NSForegroundColorAttributeName:[UIColor greenColor]};
来源：这个答案
来自这篇文章：
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:@"This is an example by @marcelofabri_"];
[attributedString addAttribute:NSLinkAttributeName
value:@"username://marcelofabri_"
range:[[attributedString string] rangeOfString:@"@marcelofabri_"]];
NSDictionary *linkAttributes = @{NSForegroundColorAttributeName: [UIColor greenColor],
NSUnderlineColorAttributeName: [UIColor lightGrayColor],
NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle)};
// assume that textView is a UITextView previously created (either by code or Interface Builder)
textView.linkTextAttributes = linkAttributes; // customizes the appearance of links
textView.attributedText = attributedString;
textView.delegate = self;
链接颜色是标签/textView的色调。因此，您可以通过更改视图的色调来更改它。但是，如果您希望在同一视图中使用不同的链接颜色，这将不起作用。
Swift
let str = "By using this app you agree to our Terms and Conditions and Privacy Policy"
let attributedString = NSMutableAttributedString(string: str)
var foundRange = attributedString.mutableString.rangeOfString("Terms and Conditions")
attributedString.addAttribute(NSLinkAttributeName, value: termsAndConditionsURL, range: foundRange)
foundRange = attributedString.mutableString.rangeOfString("Privacy Policy")
attributedString.addAttribute(NSLinkAttributeName, value: privacyURL, range: foundRange)
policyAndTermsTextView.attributedText = attributedString
policyAndTermsTextView.linkTextAttributes = [NSForegroundColorAttributeName : UIColor.blueColor()]
NSAttributedString* attributedString = [[NSAttributedString alloc] initWithString:@"here" attributes:@{ @"myCustomTag" : @(YES), NSForegroundColorAttributeName:[UIColor whiteColor], NSFontAttributeName:[UIFont fontWithName:@"SourceSansPro-Semibold" size:15], NSUnderlineStyleAttributeName : @(NSUnderlineStyleSingle) }];
Objective-C
这将使带下划线的白色文本可点击。为您的代码选择必要的属性并使用它。
要在其中有可点击链接的字符串，请执行下一步：
NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithString:@"Click " attributes:@{NSForegroundColorAttributeName:[UIColor whiteColor], NSFontAttributeName:[UIFont fontWithName:@"SourceSansPro-Semibold" size:15]}];
NSAttributedString* attributedString = [[NSAttributedString alloc] initWithString:@"here" attributes:@{ @"myCustomTag" : @(YES), NSForegroundColorAttributeName:[UIColor whiteColor], NSFontAttributeName:[UIFont fontWithName:@"SourceSansPro-Semibold" size:15], NSUnderlineStyleAttributeName : @(NSUnderlineStyleSingle) }];
[string appendAttributedString:attributedString];
因此，您将获得字符串"单击此处"，"此处"将是一个链接。可以为每个字符串设置不同的样式。
对于swift3.0
override func viewDidLoad() {
super.viewDidLoad()
let linkAttributes = [
NSLinkAttributeName: NSURL(string: "http://stalwartitsolution.co.in/luminutri_flow/terms-condition")!
] as [String : Any]
let attributedString = NSMutableAttributedString(string: "Please tick box to confirm you agree to our Terms & Conditions, Privacy Policy, Disclaimer. ")
attributedString.setAttributes(linkAttributes, range: NSMakeRange(44, 18))
attributedString.addAttribute(NSUnderlineStyleAttributeName, value: NSNumber(value: 1), range: NSMakeRange(44, 18))
textview.delegate = self
textview.attributedText = attributedString
textview.linkTextAttributes = [NSForegroundColorAttributeName: UIColor.red]
textview.textColor = UIColor.white
}
func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {
return true
}