Software Warlock » iPhone

TTStyledText problems with ampersand (‘&’)

Warlock — Sun, 25 Apr 2010 18:50:34 +0000

I ran across an interesting problem today where I was trying to use TTStyledText from the Three20 project to create a TTStyledTextLabel that had text with links nested within it. I was trying to

Map here.

I was doing this with the following (simplified code):

[TTStyledText textFromXHTML:@"Map here." lineBreaks:YES URLs:YES];

As soon as I tried to put a URL in that had multiple URL parameters (and thus an &) things would disappear.

From briefly looking at the Three20 source code, I believe this because the parsing of the XHTML text is being done with an XML parser. As soon as I replaced the &s with &s things started to work. This can be done using the following code:

[@"Map here." stringByReplacingOccurrencesOfString:@"&" withString:@"&"];

Cocoa/UIKit BulbView

Warlock — Thu, 18 Jun 2009 05:35:56 +0000

In my continuing saga to bring old-school displays to new-school (word?) devices, I’ve created a “bulb view” that displays characters in a grid of “lights”. The best way to describe it is probably just to see it:

BulbView from Mac

BulbView on iPhone

Like previous LCD view you can set the colors for the lit & dim bulbs, but improved from the LCD view, you can use letters, numbers, and most punctuation/special characters. Again the rendering is done in pure Quartz2D.

The source, including demo apps for both the Mac and iPhone, can be found here. With this view I was smart and made it conditionally compile various parts so that it can be used on either the iPhone or the Mac, without needing separate files.

Conditional Compilation for iPhone

Warlock — Thu, 18 Jun 2009 04:31:52 +0000

I’m working on a view right now that I want to be able to cross compile as either an NSView for the Mac, or a UIVIew for the iPhone. I originally wrote it for Leopard, but now I’m trying to add the precompiler directives to let it cross compile between the two platforms. A quick Google search didn’t reveal anything, here are the possible definitions you can use:

#define __MAC_10_0      1000
#define __MAC_10_1      1010
#define __MAC_10_2      1020
#define __MAC_10_3      1030
#define __MAC_10_4      1040
#define __MAC_10_5      1050
#define __MAC_10_6      1060
#define __MAC_NA        9999   /* not available */

#define __IPHONE_2_0     20000
#define __IPHONE_2_1     20100
#define __IPHONE_2_2     20200
#define __IPHONE_3_0     30000
#define __IPHONE_NA      99999  /* not available */

This definition comes from Availability.h located at /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/usr/include/Availability.h (for the iPhone 3.0 SDK).

Obviously, the __MAC_10_x is actually for the version of OSX, and the __IPHONE_x_x is for iPhone.

So, if you wanted to have code conditionally compile for the iPhone (assuming 3.0 SDK) you would do something like the following:

#ifdef __IPHONE_3_0
    // iPhone
    #import 
#else
    // Mac
    #import 
#endif