Month: February 2013

Great answer from Zubaba at Stackoverflow. I’m using a webView to display colored and bolded text and I had the same problem. I put his solution into a method and call it just after I initialize the webView. I don’t seem to need the delegate.

// This is the end of the method where I initialize the web view
    self.textView = [[UIWebView alloc] initWithFrame:textFrame];
    [self longPress:self.textView];

// This is the method that I added
- (void)longPress:(UIView *)webView {    
    UILongPressGestureRecognizer* longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress)];
    
// Making sure the allowable movement isn't too narrow
    longPress.allowableMovement=100; 
// This is important - the duration must be long enough to allow taps but not longer than the period in which the scroll view opens the magnifying glass
    longPress.minimumPressDuration=0.3;

    longPress.delaysTouchesBegan=YES;
    longPress.delaysTouchesEnded=YES;
    
    longPress.cancelsTouchesInView=YES; // That's when we tell the gesture recognizer to block the gestures we want
    
    [webView addGestureRecognizer:longPress]; // Add the gesture recognizer to the view and scroll view then release
    [webView addGestureRecognizer:longPress];
}

// I just need this for the selector in the gesture recognizer.
- (void)handleLongPress {
        
}

I was tracking down a crash caused by memory not being released and I thought it would be helpful to turn on all the compiler options, thinking that maybe it would point to something I did wrong. It didn’t help, but it did generate around a thousand warnings. Only two were actual bugs in the code. Most of the rest were conversion warnings. The most common were defining variables as NSInteger when the method that used them was expecting a CGFloat. Second most common were things like this:

return [[[self fetchedResultsControllerForTableView:tableView] sections] count];

ObjectAtIndex is an unsigned integer so and count is an NSInteger so to get rid of the warning I just cast count to NSUInteger.

return [[[[self fetchedResultsControllerForTableView:tableView] sections] objectAtIndex:(NSUInteger)section] name];

And this

return [[[[self fetchedResultsControllerForTableView:tableView] sections] objectAtIndex:section] numberOfObjects];

which should return an NSInteger rather than an unsigned NSUInteger so here I cast the return value.

 return (NSInteger)[[[[self fetchedResultsControllerForTableView:tableView] sections] objectAtIndex:(NSUInteger)section] numberOfObjects];

Second most common warnings were for unused variables. Since I use the same code for 18 different games I have if statements that determine what the locations of buttons on the screen. Many of the buttons are not used in all of the games so the compiler gives an unused variable warning. To get rid of the warning, I use this line after the last redefinition of the variable. Just so I remember that I’m using it I put it just before I use the “unused” variable. The compiler still compiles correctly when the button is needed, it just doesn’t throw the warning.

  #pragma unused(showHideButtonX)
  #pragma unused(showHideButtonY)
  if ( DISPLAY_SHOWHIDE_BUTTON ) {
      CGRect showHideFrame = CGRectMake(showHideButtonX, showHideButtonY, buttonsSize, buttonsSize);