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BOOK: Beginning iOS 5 Application Development
This is the forum to discuss the Wrox book Beginning iOS 5 Application Development by Wei-Meng Lee; ISBN: 978-1-1181-4425-1
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Old February 11th, 2012, 11:31 AM
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Default Errata for Chapter 7, project ScreenRotations

In Chapter 7, in the project ScreenRotations, the positionViews: method should have an additional parameter and the first line commented out:
-(void) positionViews:(UIInterfaceOrientation) destOrientation {    
    // UIInterfaceOrientation destOrientation = self.interfaceOrientation; 
    if (destOrientation == UIInterfaceOrientationPortrait ||
        destOrientation == UIInterfaceOrientationPortraitUpsideDown) {
        //—-if rotating to portrait mode—-
        btn.frame = CGRectMake(20, 20, 233, 37);
    } else {        
        //—-if rotating to landscape mode—-
        btn.frame = CGRectMake(227, 243, 233, 37);
So, when calling the positionViews: method, you should call it with the destination orientation:

                               duration:(NSTimeInterval)duration {
    [self positionViews:toInterfaceOrientation];
Finally, in the viewDidLoad method, call the positionViews: method with the current destination:

- (void)viewDidLoad
    [self positionViews:[[UIApplication sharedApplication] statusBarOrientation]];
    [super viewDidLoad];
The original code in the book works when using the positionView method with the willAnimateSecondHalfOfRotationFromInterfaceOrient ation: method. However, since the latter method is deprecated, you need to manually pass in the destination orientation to the positionViews method.
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Brabbeldas (February 17th, 2012)
Old May 14th, 2012, 08:51 PM
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Default The original code in the book also works if you...

...use the willAnimateRotationToInterfaceOrientation: method (instead of, as pointed out here, the willAnimateSecondHalfOfRotationFromInterfaceOrient ation: method).

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