CODEWITHSUNDEEP
iosswiftios8uialertview
iOS
iOS

Reputation: 3616

Highlight words in UIAlertView? (with bold text)

I want to highlight some words in my UIAlertView message, either by making it bold, or, by underline. 

let message = "This is normal text.\nBold Title:\n This is normal text"

let alert = UIAlertView(title: "Title", message: message, delegate: self, cancelButtonTitle: "Cancel", otherButtonTitles: "OK")

alert.show()

How could I make "Bold Title" bold (or underline) in message?

Upvotes: 2

Views: 6491

Answers (5)

BlaShadow
BlaShadow

Reputation: 11693

it's not with an alertView but with AlertViewController here's how you present a bold text

let alertController = UIAlertController(title: "", message: "", preferredStyle: .alert)

let attributedText = NSMutableAttributedString(string: "Bold text", attributes: [NSAttributedString.Key.font: UIFont.systemFont(ofSize: 14, weight: .semibold)])
alertController.setValue(message, forKey: "attributedMessage")

controller.present(alertController, animated: true, completion: nil)

Upvotes: 0

Pierre
Pierre

Reputation: 9052

Onur Keskin asked, code for Xamarin doing what OP asked. Basically Subin's answer converted:

var message = "This is normal text.\n<b>Bold Title:</b>\n This is normal text\n<b>Bold 1:</b> bold 1 text\n";

var b_open = "<b>";
var b_close = "</b>";
var boldSpots = new List<NSRange>();
var boldCount = (message.Length - message.Replace(b_open, "").Length) / b_open.Length;
for (int i = 0; i < boldCount; i++)
{
    var startBold = message.IndexOf(b_open);
    var endBold = message.IndexOf(b_close);
    message = message.Remove(startBold, b_open.Length).Remove(endBold - b_close.Length + 1, b_close.Length);
    boldSpots.Add(new NSRange(startBold, endBold - startBold - b_close.Length + 1));
}
var attrString = new NSMutableAttributedString(message);
boldSpots.ForEach(nsRange => attrString.AddAttribute(UIStringAttributeKey.Font, UIFont.FromName(ConfigurationProvider.FocoBold, 16), nsRange));

var lines = message.Length - message.Replace(@"\n", "").Length;

UILabel lbl = new UILabel(new CGRect(0, 0, 1, 1))
{
    Lines = lines,
    AdjustsFontSizeToFitWidth = true,
    AttributedText = attrString,
    TextAlignment = UITextAlignment.Center
};

var alert = new UIAlertView
{
    Title = "My Title"
};

alert.SetValueForKey(lbl, new NSString("accessoryView"));

alert.AddButton("OK");
alert.Clicked += (s, e) => {
    //OK Clicked
};
alert.Show();

Upvotes: 0

ZoobieDoobie
ZoobieDoobie

Reputation: 363

This is what I did using accessoryView of UILabel and adding it in the Alert.Here the word YES will be in Bold in the sentence.

UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Title for your alert" message:@"" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
            UILabel *lbl = [[UILabel alloc]initWithFrame:CGRectMake(0,0, 900, 900)];
            lbl.numberOfLines=1;
            lbl.adjustsFontSizeToFitWidth = YES;
            NSMutableAttributedString *attributedStr = [[NSMutableAttributedString alloc]initWithString:@"Please press Yes"];
            [attributedStr addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"Helvetica-Bold" size:20.0] range:NSMakeRange(13,3)];
            lbl.attributedText = attributedStr;
            lbl.textAlignment = NSTextAlignmentCenter;
            [alert setValue:lbl forKey:@"accessoryView"];
            [alert show];

Upvotes: 3

Pasha_Molodkin
Pasha_Molodkin

Reputation: 51

The UIAlertView cannot be changed. If you wish to modify it, you will need to create your own from scratch.

Please read: UIAlertView Class Reference

The UIAlertView class is intended to be used as-is and does not support subclassing. The view hierarchy for this class is private and must not be modified.

Maybe you should go to UIAlertController there is support for editing.

Upvotes: 0

Andrew Ebling
Andrew Ebling

Reputation: 10283

This is currently not possible, as the UIAlertView API does not support attributed strings, which would be the normal way you would accomplish something like this.

Upvotes: 2

Related Questions