Just how to you use TTStyledTextLabel?

问题:

All I want is to display some simple text in my viewController and have the hyperlinks autoparsed. When the user clicks on the link I want the control to somehow do a callback where I can do something with the URL. How can I achieve this?

I've already looked through the TTCatalog for hours. I have also tried looking into the source code of three20 as well as looking at the stack trace. No help. I just can't figure out how my app can react to the click of the URL. Any hints please?

回答1:

Hard to help without seeing what you've already tried, but you should be able to do something like the following:

TTStyledTextLabel* label = [[[TTStyledTextLabel alloc] 
        initWithFrame:someFrame] autorelease];
NSString* labelText = @"This should <a href=\"custom-uri://some/url\">work</a>";
label.text = [TTStyledText textFromXHTML:labelText lineBreaks:NO URLs:YES];
[someView addSubview:label];

You can then use TTNavigator and TTURLMap to map custom-uri://some/url to a particular controller in your application, or handle it yourself in your application delegate. The best place to find out how to do that is by looking at the TTNavigatorDemo sample application included in the Three20 source. Specifically, look at AppDelegate.m which is where all the URL mapping gets performed.

回答2:

In addition to what Nathan says about URL mapping and links, you can also use CSS styles!

TTStyledTextLabel* label = [[[TTStyledTextLabel alloc] initWithFrame:someFrame] autorelease];
NSString* labelText = @"This should <a href=\"custom-uri://some/url\">work</a> and 
<span class=\"redText\">this should be red</span>";
label.text = [TTStyledText textFromXHTML:labelText lineBreaks:NO URLs:YES];
[someView addSubview:label];

Then in your StyleSheet.m implement

- (TTStyle*) redText {
  return [TTTextStyle styleWithFont:[UIFont systemFontOfSize:12] color:RGBCOLOR(255,0,0) next:nil];
}