Calculating UILabel and UIButtons sizes to make a sentence?

Question

I'm trying to show in my app something like this:

Liked by @user1, @user2 and 3 more.

Many apps have this format either for comments like who posted it and their comment, example: @me yeah apples are good

When you tap their name, it takes you somewhere in the app.

I would like @user1 @user2 and 3 more to be clickable and perform a selector.

I would also like them to be bold and a certain color.

UIWebView can stylize text but can I perform selectors by touching part of an attributed string?

I have been trying to find the best way to do this without making labels and buttons and calculating them dynamically by the length of each username like this:

Label  = "Liked by "
Button = "@user1"

Label ", "
Button = "@user2"

Label "and "
Button "3 more"

Label "."

There must be a better way! Thanks in advance.

Look into this: http://stackoverflow.com/questions/3786528/iphone-ipad-how-exactly-use-nsattributedstring — Regan, Jul 23 '12 at 20:24

score 2 · Accepted Answer · 2012-07-29T22:06:17.923

You'd be better with an inline UIWebView -- provided you don't need to add this to a scroll view. You can detect actions/link clicks inside a webview by registering some delegate for them and then giving fake protocols/URLs as the link URL. Something like this:

UIWebView *wv = [[UIWebView alloc] initWithFrame:aFrame];
wv.delegate = self;
[wv loadHTMLString:@"<a href='userlike:user1'>@user1</a> hates this." baseURL:nil ]; // further parts of this method name omitted
// because it's long, look it up in UIWebView class reference.
[self.view addSubview:vw];
[wv release];

And the delegate method:

- (BOOL)webView:(UIWebView *)wv shouldStartLoadWithRequest:(NSURLRequest *)rq navigationType:(UIWebViewNavigationType)type
{
    if ([[[rq URL] protocol] isEqualToString:@"userlike"])
    {
        NSString *userName = [[rq URL] host];
        // extract username from the URL, then
        return NO;
    }

    // else
    return YES;
}

EDIT: I found this, exactly what you're looking for. (as it turns out, @regan also suggested the exact same thing.)

@JoseVentura I've found an even better solution, see the edit. — , Jul 23 '12 at 20:55

score 1 · Answer 2 · edited May 23 '17 at 11:55

1

You can call selectors from the HTML code, see for example here and here.

edited May 23 '17 at 11:55

Community

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answered Jul 23 '12 at 20:27

Martin R

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Calculating UILabel and UIButtons sizes to make a sentence?

2 Answers2