Math support...

With help from Norbert, the matrix is finally made possible, after some guess and luck.

Perhaps it's time that I make it available to Cydia.

Way to Implement Controller Classes Without ANY .nib Files

The trick by RickMaddy@iphonedevsdk.com is what I was looking for, the way to inherit a Controller class without an Interface Builder, i.e. .nib/.xib files. And samples for the Open Toolchain!

Hope this technique would make my codes more organized and readable. And this just neuturalized another reason for me to buy a Mac.

Show a view with timer and then disappear

Perhaps it's not the most cleaver way, but seems to work for me.

#import "UIKit/UIKit.h"
#import "Foundation/Foundation.h"
//Note that the lines above apply to my settings of opentoolchain.
@interface aView:UIView
{
  NSTimeInterval _interval;
  NSInteger _hideCount;
  NSTimer _timer;
}
-(void) show;
-(void) hideMe:(id)param;
@end

@implementation aView
-(void) show{
  if(_hideCount<0) _hideCount = 0;
  _hideCount++;
  _timer=[NSTimer scheduledTimerWithTimeInterval:interval target:self selector:@selector(hideMe:) userInfo:nil repeats:NO];
  [self setUserInteractionEnabled:YES];
  return;
}
-(void) hideMe:(id)param
{
  if(_hideCount<=1)
  {
    //Hide it here
    [self removeFromSuperview];
  }
  _hideCount--;
  return;
}
@end