Friday, October 28, 2011

Writing a component for iOS

I just published an article that discusses my implementation of the accelerometer - Writing a component for iOS using Delphi XE2 and FireMonkey.



  1. As mentioned before: you really should use {$mode delphi} instead of {$mode objfpc}{$h+} in your sample code if you want to make it as easy as possible
    a) for people used to Delphi to reuse their existing code
    b) for people to reuse as much code as possible that's written now in a future version of Delphi that will directly support iOS instead of leveraging FPC for that purpose.

    Both Delphi and ObjFPC mode can be combined with {$modeswitch objectivec1} to enable Objective-Pascal constructs. Additionally, since Delphi only supports recent Mac OS X and iOS versions, you should probably use {$modeswitch objectivec2} instead to enable for-in for Objective-C data structures that conform to the "fast enumeration" protocol:

  2. The only real stumbler I have to making great FireMonkey iOS apps is that I can't react to callback messages without hacking the FMX_Platform_iOS.pas file. Things like responding to low memory, device rotation, or other callbacks to the UIViewController sub class. It seems to be easy and strait forward to just copy FMX_Platform_iOS.pas to my project and make the changes. This however, could be a bad thing when FireMonkey is updated. Have you run into this problem? Any good solutions? - Thanks for all your great examples!

  3. @Chuck: That's exactly what I've been doing so far. Hopefully this can be worked into an update at some point.

  4. Thanks for all your work on this firemonkey stuff.

    From ios 5 on there is a possibility to speak into the iPad /iphone to put text in a textbox or memofield.

    But application will crash then in an firemonkey app. Is there a way to deactivate the speech-Button in the keyboard-layout, so that the user can not use this functionality?

    OK, better would be, that would work in firemonkey, but in the meantime could this perhaps be a solution.


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