Archive for October, 2010

October 30, 2010 0

Better NSLog – Adding function name / line number to NSLog

By admin in Uncategorized

When tracking down a bug, the most useful way to start checking things is to NSLog something. I’m a heavy user of breakpoints and the debugger. I can’t live without it, and it’s saved me countless hours. However I usually see if i can NSLog something first perhaps the problem was an obvious one. A [...]

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October 26, 2010 4

The best form submission class (asi-http-request)

By admin in Uncategorized

Small but quick snippet here. Sending multi-part form with image data: NSString *imagePath = NSString *imagePath = [NSString stringWithFormat:@"%@/%@", [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject], @"junny.png"];   UIImage *image = [UIImage imageWithContentsOfFile:imagePath]; NSData * imageData = UIImageJPEGRepresentation(image, 0.75)   ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:http://example.com/form.php]]; [request setPostValue:@"I like brains!" forKey:@"title"]; [request setPostValue:[NSString stringWithFormat:@"%@", [NSDate date]] forKey:@"session"];l [request [...]

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October 14, 2010 0

Parsing Delimited String from XMLNode on iOS using GDataXMLNode

By admin in Uncategorized

Often when you work with XML, you need to put a bunch of values into a node, maybe positioning information for example. The best way to do that is to create a “Delimited String”, that is “ABC|123|XYZ|987″, is delimited by the | character. Here’s how you get that back in iOS into an array, that [...]

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October 10, 2010 2

Reading / Creating XML in iOS

By admin in Uncategorized

As I’ve mentioned previously, this blog serves as a kind of social-bookmarker, and exist somewhat in order for me to chronologically log my learning experience with iOS programming. So not everything I post is always a how-to or a tip, but sometimes I will share something which I read that I found useful that people [...]

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October 6, 2010 0

Post-A-Day #10 UIViewController’s views

By admin in Uncategorized

-(void) someEventDidOccur EditOptionsViewController *anEditOptionsViewController = [modalViewControllers_ objectForKey:@"someName"];   // A little note about retain/release // views are not aware of their UIViewController // When they don’t have one, and .view is requested UIViewController will simply create a new one. // In the code below, if the order were reversed, "anEditOptionsViewController" would be dealloced // // [...]

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October 5, 2010 0

Post-A-Day #9 – Blocks Part 1

By admin in Uncategorized

In objective-C a Block is a type of closure. A closure, is a method that contains state information, using free variables. It binds the variables for you on the stack, so in that sense it “closes” the expression. To give an example in javascript you could call setTimeout this way: function callLater(first, second, third) { [...]

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October 3, 2010 1

Post-A-Day #8 – Allow superview to recieve events caught by subview.

By admin in Uncategorized

I had a problem in my current project related to this, and it was a good opportunity, to learn a little bit more about how touches are handled in iOS. Enter UIResponder UIResponder is the Class any objects that which to receive events must Subclass, if they wish to receive (among other types) TouchEvents from [...]

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