willAnimateRotationToInterfaceOrientation not being called

Excelcius

Hi all Ive run into a little problem with xcode 4.5 where the display doesn't rotate on start up, Im using a modified version of the app scaffold rotation scheme, after having done a little bit of digging on Google I discovered that its a rather over enthusiastic depreciation in iOS 6 where shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation isn't called. After having looked at the new sparrow 1.4 app scaffold I added the following method to my code

- (NSUInteger)supportedInterfaceOrientations
{
    NSArray *supportedOrientations =
    [[[NSBundle mainBundle] infoDictionary] objectForKey:@"UISupportedInterfaceOrientations"];

    NSUInteger returnOrientations;
    if ([supportedOrientations containsObject:@"UIInterfaceOrientationPortrait"])
        returnOrientations |= UIInterfaceOrientationMaskPortrait;
    if ([supportedOrientations containsObject:@"UIInterfaceOrientationLandscapeLeft"])
        returnOrientations |= UIInterfaceOrientationMaskLandscapeLeft;
    if ([supportedOrientations containsObject:@"UIInterfaceOrientationPortraitUpsideDown"])
        returnOrientations |= UIInterfaceOrientationMaskPortraitUpsideDown;
    if ([supportedOrientations containsObject:@"UIInterfaceOrientationLandscapeRight"])
        returnOrientations |= UIInterfaceOrientationMaskLandscapeRight;

    NSLog(@"supported orientations called");

    return returnOrientations;

}

The NSLog statement confirms that this is now being called but thats it, the view on the device remains on its side and a NSLog statement in willAnimateRotationToInterfaceOrientation is never fired.

The supported interface orientations are all selected in the desired order under the summery tab and the initial interface orientation is added to the info plist and is set to the same value as the first supported interface orientations selected under the summary tab any ideas why willAnimateRotationToInterfaceOrientation isn't being called

Just to add Im using the emulator and it does get called when I use Hardware Rotate Left and Rotate Right it just not calling on start up, as it used to before and as a result it takes several rotations to get it to display as it should

Thanks

Excelcius

Just as an added note in my version of the app scaffold I have a class called Canvas which is a sprite containing another sprite (the game class) this canvas class holds the rotate method. This class is added to the stage in the app delegate. I have added the following method call to the init method of this canvas class

[self rotateToInterfaceOrientation:screenOrientation animationTime:0];

this method call is in the normal version of the app scaffold but not previously in my version, although this fixes the issue there is a problem, I have a clipping class which worked previously but now the clip area is upside down, which leads me to believe that because willAnimateRotationToInterfaceOrientation is not called by the system on startup the actual view is not being rotated although I could be wrong

Any help greatly appreciate

Shilo

Hello Exculcius,

I have had quite a few problems trying to support iOS 5 and 6 together. One of my problems is that iOS 6 can automatically "initialize" a view controller in landscape (thus, no need to rotate it), where as in iOS 5, it will "initialize" the view controller in portrait only, then rotate to landscape if needed. I believe this is causing your issue. Although I am not completely sure if iOS 5 view controllers will "initialize" in landscape if the app is landscape only, as my apps usually support all orientations.

I haven't found an optimal solution to support both portrait and landscape while also supporting iOS 5 and 6. I have found a few work arounds that require the AppDelegate to wait for a very small delay (or wait until the first orientation change) and then correct the objects' orientations if necessary.

I think the first step would be to check the "status bar orientation" on load and after a short delay with iOS 5 and iOS 6 and figure out if there are any differences, maybe throw in a check for the view controller's orientation and the devices orientation just to be sure.

If iOS 5 and iOS 6 show different results, then I believe it is very similar to problems I have run into, and I will give you a snippet of my personal work around.

One question: Does your app only support landscape orientation and is the plist's UIInterfaceOrientation set to landscape also?

Also, in cases like these, I trust device's results over simulator results. So I suggest you test it on a device also.

Excelcius

Hi Shilo

My app currently supports all orientations I modified the app scaffold so that regardless of the default orientation or where ever you rotated it to, or if some orientations were disabled, the x,y coordinates and the pivotX and pivotY coordinates were set to 0, 0, 0, 0 top left corner and so that a clipping sprite I created could have its clip coordinates set relative to its parent sprite, regardless of how deeply nested and again regardless of the orientation, I was going to share it when I made sure all the bugs were squished, up until this annoying ios6 update I had it all working perfectly 🙁 why on earth did they change it.

I cant find a UIInterfaceOrientation option when I try to add it to the plist but I can confirm that all the supported interface orientations are present and the "initial interface orientation" is added to the info plist and is set to the same value as the first supported interface orientations selected.

Just to clarify the issue further my app is set to support all orientations with the default set to landscape left, (Im building it in landscape first as I was originally only going to support this orientation) when I start it, the emulator starts in landscape but the game sprite is displayed at 90 degrees on its side (portrait) the bottom facing left. but the clip coordinates appear to be in landscape but upside down ie if the clip is set to y 10px from the top, the clip is displayed 10px from the bottom

When I add the line [self rotateToInterfaceOrientation:screenOrientation animationTime:0]; to the end of the canvas initialisation it displays the game sprite the correct way landscape left but again the clip coordinates are upside down. after rotating the app it displays correctly.

Excelcius

Just noticed something when I set the default orientation to landscape right it display the clip bounds in the correct way at the top, it seems as if the view when set to landscape left or right defaults to landscape right.

mysemo

I struggled with this for days and was madly frustrated.

No need for hacks or delays. It's very much possible with the scaffold. 🙂 The only thing I had to change was subclass SPView to change the x/yConversion variables in processTouchEvent (1 for iPad, normal calculation otherwise). Not sure why, but there you go.

Check my two replies in this thread: http://forum.sparrow-framework.org/topic/graphics-orientated-wrong-on-start-up-of-simulator?replies=6#post-15350

Excelcius

Hi Mysemo I can't change the SPView because in my version of the Appscaffold Ive got a class which has methods for finding the x y coordinate in relationship to the parent object and also in relationship to the top left corner of the screen, it also takes into account different pivot points. So changing how the SPView deals with touch coordinates would probably break something somewhere, and then Apple would probably end up fixing it 6 months down the line then Id have to change it all back again 🙁 Also Ive got a class which you can set a clipping region in relationship to a parent object regardless of the pivot point and screen orientation and that can't be fixed by changing how SPView deals with touch coordinates.

Ive looked around but as I understand it willAnimateRotationToInterfaceOrientation is how iOS alerts the program to orientation changes so not sure how I could do an app which supports multiple orientations without it.

- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation duration:(NSTimeInterval)duration
{
    // rotate Sparrow content

    Canvas *gameController = (Canvas*)[mSparrowView.stage childAtIndex:0];
    [gameController rotateToInterfaceOrientation:interfaceOrientation animationTime:duration];
}

Ive basically got it working just had to force a call to my rotateToInterfaceOrientation method in the init of my Canvas class and change the default orientation from landscape left to landscape right because ios6 has a bug which defaults landscape left to landscape right on start up, Im just defaulting to landscape at the moment for coding the final version will default to portrait first because thats most likely the way people will be holding the phone when they start the app on the device. Still annoyed that they messed it all up I had it working perfectly before

mysemo

Oops! Got completely confused with what I wrote there! Sorry about that...

My willAnimateRotationToInterfaceOrientation:duration: method looks pretty much exactly as you've written above. I support both iOS5 and iOS6. Multiple orientations. Works fine!