This is a wrapper for the C MessagePack parser, as an easy to use bridge to Objective-C, which my employer has graciously permitted us to open source:

https://github.com/chrishulbert/msgpack/tree/master/objectivec

In a similar way to the JSON framework, this parses MessagePack into NSDictionaries, NSArrays, NSNumbers, NSStrings, and NSNulls.

It contains a small patch to the C library so that it doesn't segfault with a byte alignment error when running on the iPhone in armv7 mode.

I've been annoyed lately at the number of baby apps that don't seem to work when my daughter is playing with my iphone. Seems that the problem is that they only expect one finger, but if bubby is holding the phone with one hand on the screen and taps it with her other hand, it doesn't work. Or if she taps it with more than one finger, or if she swipes instead of tapping, or doesn't get it 'just right'.

So to that end, i've made a UIGestureRecogniser that works for any old tap, especially for baby games for the iphone:

And you use it like so, in your view controller:

- (void)viewDidLoad {


    [super viewDidLoad];


 


    BabyTapGesture *bub = [[[BabyTapGesture alloc] initWithTarget:self action:@selector(tap)] autorelease];


    [self.view addGestureRecognizer:bub];


 


}


 


- (void) tap {


    NSLog(@"Tapped!");


}
<div>

Recently i've needed to implement the 'observer/notifier' pattern (is that what it's called?) in objective-c for an iphone app. The gist of this is that I need for my notifier to keep track of a set of observers.

However, due to the nature of reference counting (we're not garbage collected), this set of observers must hold weak references, and the observers' dealloc method must make a call to the notifier, telling it to remove the observer from the set. Without the weak reference, the observer will never be freed, and we have a memory leak.

Now the NSMutableSet always retains any object that it contains, so it's not much help. So here's my set that only holds weak references:

And here's an example of using it. The logged output from this test should all be 1's for the retain count:

NSString *col = [NSString stringWithFormat:@"Blue"];


NSLog(@"Colour retain: %d", col.retainCount);


WeakReferenceSet *set = [WeakReferenceSet set];


[set addObject:col];


NSLog(@"Colour retain: %d", col.retainCount);


[set addObject:col];


[set addObject:col];


[set addObject:col];


NSLog(@"Colour retain: %d", col.retainCount);


[set removeObject:col];


NSLog(@"Colour retain: %d", col.retainCount);


[set removeObject:col];


[set removeObject:col];


[set removeObject:col];


NSLog(@"Colour retain: %d", col.retainCount);


[set addObject:col];


NSLog(@"Colour retain: %d", col.retainCount);


[set removeAllObjects];


NSLog(@"Colour retain: %d", col.retainCount);

Recently needed to manually edit the pixels on a UIImage so i could apply, in my case, a colourising filter ("colorizing" for most of you reading this!)

Anyway, couldn't find many good tuts on the web, so here we go with my code. Tested and works great in xcode 4.2 / iphone.

Here's my end result. You may recognise a yamaha FZ1N. Lovely bike, wish i'd never sold it:

And here's the code:

Available in the app store!

Screenshots

(download)

Click here to download:

baby-allergy-tracker-oGHEcjgFJbccwhCJapaB.zip (110 KB)

Untried foods

This is where you can view your 'to-do' list of foods that you haven't tried yet.

When you feed your child a food, tap it in this list and select 'Mark as tried'. The food will then be removed from this list and appear on the 'Tried foods' list.

To add a new food, tap the '+' button in the top right.

To remove a food, swipe across its and tap delete.

Tried foods

This is where you can see your list of foods that you have tried, and take notes if your child has a suspected reaction.

To take notes if you suspect your child has had a reaction to a food, tap it in this list and select 'Reaction notes'.

Any foods that you have made any notes against will appear orange in this list.

To remove a food from this list and return it to the untried foods list, tap it and select 'Move back to untried'.

Reaction list

This is for viewing just the foods that have reaction notes in a convenient list.

To view further details about any food, simply tap its name in this list.

Important

Remember that this app is no substitute for professional medical help. You must consult with your family doctor, pediatrician, or nurse if you suspect your child is having an allergic reaction, or if your family has a history of allergies.

About

This app was lovingly crafted by Chris Hulbert (Splinter Software) for his wife and soon-to-be child. You can get in touch via email with any suggestions for how to improve this app.

See my other apps.

Icon by Laura Design.

Toolbar icons from app-bits.

I've been busy power sanding the edge of the deck flush with the side using a mouse sander, just to tidy up what the planer couldn't really get perfect. Last photo you can see i've puttied it up, ready for some hand sanding. Then it should be good for stain and clearcoat.

(download)

Click here to download:

power-sanding-the-deck-zdbhJicxtAzxkhJArgIu.zip (497 KB)