Tips & Tricks for iPhone Application Development (London)

Tips & Tricks for iPhone Application Development Skills Matter - London - February 2nd 2010 Tuesday, February 2, 2010

Tuesday, February 2, 2010

Adrian Kosmaczewski Tuesday, February 2, 2010

akosma software akosma.com akosma.tumblr.com github.com/akosma linkedin.com/in/akosma facebook.com/akosma Tuesday, February 2, 2010

@akosma Tuesday, February 2, 2010

some questions Tuesday, February 2, 2010

new to iPhone? Tuesday, February 2, 2010

designer? developer? Tuesday, February 2, 2010

technologies? Tuesday, February 2, 2010

Android J2EE J2ME .NET Ruby on Rails others? Tuesday, February 2, 2010

programming languages? Tuesday, February 2, 2010

C / C++? Java, C#? Ruby, Python, Lua? JavaScript? Tuesday, February 2, 2010

Dev Days for iPhone Tuesday, February 2, 2010

Mon, April 26th 2010 Tuesday, February 2, 2010

Win a free ticket! Tuesday, February 2, 2010

Fill your evaluation form! :) Tuesday, February 2, 2010

iPhone dev ≠ web dev Tuesday, February 2, 2010

Cocoa & Objective-C Tuesday, February 2, 2010

born in the 80s Tuesday, February 2, 2010

Objective-C Tuesday, February 2, 2010

Objective-C Java @interface & class (1 ﬁle) @implementation @protocol interface #import // ﬁles! import // classes! n/a (in C#, “class categories extensions”) id n/a (generics?) Tuesday, February 2, 2010

Objective-C Java @selector n/a NSObject / Object NSProxy / ... @public / @protected / public / protected / @private private @try / @catch / @ﬁnally try / catch / ﬁnally NSException Exception n/a package / namespace Tuesday, February 2, 2010

• Thin layer around C • Message-dispatch runtime • Static and dynamic (you choose) • The “real” inspiration for Java: • http://cs.gmu.edu/~sean/stuff/java- objc.html Tuesday, February 2, 2010

• Single inheritance + interfaces (“@protocols”) • @protocols can have optional methods • Fields protected by default • All methods are virtual and overridable • Methods can be added to existing classes • Full introspection / reﬂection • Messages can be intercepted and forwarded à la AOP Tuesday, February 2, 2010

Demo Tuesday, February 2, 2010

Cocoa Touch Tuesday, February 2, 2010

iPhone Speciﬁcs Tuesday, February 2, 2010

128 or 256 MB RAM Tuesday, February 2, 2010

~70 MB for the OS! Tuesday, February 2, 2010

no swap ﬁle Tuesday, February 2, 2010

(no virtual memory) Tuesday, February 2, 2010

no garbage collector Tuesday, February 2, 2010

(manual memory management) Tuesday, February 2, 2010

http://cocoadevcentral.com/d/learn_objectivec/ Tuesday, February 2, 2010

no automatic objects on the stack (C++) Tuesday, February 2, 2010

// C++ // Memory freed when out of scope std::string name(“Adrian”); std::string *name = NULL; name = new std::string(“Adrian”); delete name; Tuesday, February 2, 2010

hygiene Tuesday, February 2, 2010

memory warnings Tuesday, February 2, 2010

avoid autorelease Tuesday, February 2, 2010

lazy-loading & reuse Tuesday, February 2, 2010

custom table cells & reuse Tuesday, February 2, 2010

override setters properly Tuesday, February 2, 2010

beware of delegation Tuesday, February 2, 2010

instruments & static analysis Tuesday, February 2, 2010

warnings as errors Tuesday, February 2, 2010

code organization Tuesday, February 2, 2010

(cheaper maintenance) Tuesday, February 2, 2010

iPhone ≠ computer Tuesday, February 2, 2010

http://www.flickr.com/photos/oskay/365607662/ Tuesday, February 2, 2010

http://www.flickr.com/photos/blakespot/2379207825/ Tuesday, February 2, 2010

http://www.flickr.com/photos/oskay/365607591/ Tuesday, February 2, 2010

Mobile HIG Tuesday, February 2, 2010

now more important than ever! Tuesday, February 2, 2010

NDA Tuesday, February 2, 2010

books Tuesday, February 2, 2010

thanks! Tuesday, February 2, 2010

questions? Tuesday, February 2, 2010

http://akosma.com	119
http://skillsmatter.com	94
http://www.slideshare.net	19
http://webcache.googleusercontent.com	1

Tips & Tricks for iPhone Application Development (London)

by Adrian Kosmaczewski on Feb 03, 2010

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Tips & Tricks for iPhone Application Development (London) — Presentation Transcript