A single action for multiple iPad / iPhone buttons, and animation

For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))

How do we add animation to an iPad / iPhone app? How do we share one action routine across a whole lot of similar buttons? These are amongst the questions that we looked at, and answered, in the little demonstration below during today's iOS / iPad / iPhone "Geekfest" ;-).

Here is the header file ViewController.h:

  #import 

 

  @interface ViewController : UIViewController{

    UIButton *goUp;

    UIButton *goDown;

    UIImageView *crewe;

  }

 

  @property(nonatomic, retain) IBOutlet UIButton *goUp;

  @property(nonatomic, retain) IBOutlet UIButton *goDown;

  @property(nonatomic, retain) IBOutlet UIImageView *crewe;

 

  -(IBAction)movingImage:(id)sender;

@end

And the changes to ViewController.m:

  @synthesize goUp;

  @synthesize goDown;

  @synthesize crewe;

With the added action routine:

  -(IBAction)movingImage:(id)sender {

   

    if (sender == goUp) {

   

    [UIView beginAnimations:@"moveitup" context:NULL];

    [crewe setFrame:CGRectOffset([crewe frame],0,-400)];

    [UIView commitAnimations];

       

    } else {

 

    [UIView beginAnimations:@"moveitdown" context:NULL];

    [UIView setAnimationDuration:5.0];

        // Should really have used animateWithDuration 

    [crewe setFrame:CGRectOffset([crewe frame],0,400)];

    [UIView commitAnimations];

   

    }

  }

Results:

(written 2012-03-11)

Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles

C501 - C and C based languages - Objective C, XCode and iOS Resources
  [3594] Back to Uni - (2012-01-26)
  [3596] Want to learn iPad and iPhone programming? Come along and learn with me for free. - (2012-01-28)
  [3599] Seeing how Melksham has changed over the years, via an iPad - (2012-01-30)
  [3648] iPad and iPhone programming - our seminar weekend with Xcode - (2012-03-11)
  [3650] Possessive Regular Expression Matching - Perl, Objective C and some other languages - (2012-03-12)

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A single action for multiple iPad / iPhone buttons, and animation
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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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