Objective-c device orientation

Question

I am building a template app. I am having some issues with the device rotation/orientation. I have the following in my appDelegate didFinishLaunching:

[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];

and in my VC viewDidLoad:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(deviceOrientationDidChange:) name:UIDeviceOrientationDidChangeNotification object:nil];

...

//add the title bar
    titleBar = [[OAI_TitleBar alloc] initWithFrame:CGRectMake(0.0, 0.0, 1024.0, 50.0)];
    titleBar.titleBarTitle = @"OAI Template";
    titleBar.hasAccount = YES;
    titleBar.hasReset = YES;
    titleBar.hasHome = YES;
    [titleBar buildTitleBar];
    [self.view addSubview:titleBar];

This is my deviceOrientationDidChange method:

//rotate the vc view
    if (UIDeviceOrientationIsLandscape([UIDevice currentDevice].orientation)) {
        [self.view setFrame:CGRectMake(0.0, 0.0, 1024.0, 768.0)];

    } else if (UIDeviceOrientationIsPortrait([UIDevice currentDevice].orientation)) {

        [self.view setFrame:CGRectMake(0.0, 0.0, 768.0, 1024.0)];
    }

    //call the rotation management methods of various classes
    [titleBar adjustForRotation:orientation];

}

This works fine when I rotate the device, the views adjust as expected. But when the app launches, the x,y coordinates are wrong - when I log the frame when launching in portrait orientation, the VC view's frame is {{0, 20}, {768, 1004}}, when launching in landscape mode it is {{20, 0}, {748, 1024}}

The titlebar frame is {{20, 0}, {748, 1024}} for landscape and portrait (which is as I coded it).

However, what I am seeing in the simulator and on my device is drastically different. What you should see is a black bar (50 pixels or so in height) at the top with a logo on the left, followed by some buttons and then the app title aligned right. As you can see from the images below, when the app launches in either orientation it's opening x/y coords are no where near 0/20. Any help would be appreciated.

What it looks like to me is that when the app launches in landscape it is being displayed as portrait and when it launches as portrait, though the display is right, it is off by about 20.0f or so. Any help would be appreciated.

Landscape screen capture

Portrait screen capture

Ok, so the portrait solution was obvious, it should be reset to 0, 20, 1004, 768 but I am still having issues with the landscape view, though I can now see a the title bar, the vc view itself is loading at what seems to be about 200.0f in from the left edge of the device. — PruitIgoe

PruitIgoe PruitIgoe · Accepted Answer · 2013-07-24T14:14:54

Solved it, I

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {

    return interfaceOrientation == UIInterfaceOrientationPortrait || interfaceOrientation == UIInterfaceOrientationLandscapeLeft || interfaceOrientation == UIInterfaceOrientationLandscapeRight;
}

in my viewController, made sure the correct orientations were in my plist and it loads fine.

Objective-c device orientation

1 Answers