there is all this....
- (BOOL)shouldAutorotateToInterfaceOrientation: (UIInterfaceOrientation)interfaceOrientation {
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
return (interfaceOrientation != UIInterfaceOrientationPortrait && interfaceOrientation != UIInterfaceOrientationLandscapeLeft && interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
} else {
return YES;
}
}
and i want the accelerometer to work in landscape as if it was in portrait... I have all the accelerometer stuff such as:
- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration*)acceleration {
accx = acceleration.x;
}
also i have tried looking at other questions but i can't find the solution...?
Ok, if understood correctly, you are in portrait (in the X axis direction see the image), tilt right and tilt left then the image in your app should move right and left. Then you switch to landscape and your image should now move right and left but it doesn't, the axis you should pay attention now is the Y axis.
There is no reason why you should not be seeing any change in the Y axis when you rotate to landscape, unless there is hardware damage and that the accelerometer had stopped working.
Now, what you ask for is a way to reset the accelerometer so that you can keep reading from the X even though the changes are happening in the Y axis? No, there is no way to do this, unless you write an extra method ... something along the lines of:
+(UIAccelerationValue)fixedAccelerationValue{
//Check which axis you should look for
if ( [[UIDevice currentDevice] orientation] == UIInterfaceOrientationPortrait || [[UIDevice currentDevice] orientation] == UIInterfaceOrientationUpsideDown ){
//read from the x axis
}
else{
//read from the y axis
}
}
I had the same problem and fixed it by adding the BOOL statement prior to the UIACCELEROMETER in the implementation file.
(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
if (interfaceOrientation == UIInterfaceOrientationPortrait ||
interfaceOrientation == UIInterfaceOrientationLandscapeLeft ||
interfaceOrientation == UIInterfaceOrientationLandscapeRight)
return YES;
else
return NO;
}
Hope this helps.
Related
For my app, I want to let the device rotate anyway but upside-down. This is working fine. However, I want to stop the app from rotating specifically from
landscape left -> landscape right - and vice versa
If anyone is curious, this is because that rotation messes up my layouts, as they each rotate from a common point
My code for iOS 5, which I think would work, is like this:
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation {
NSLog(#"Rotating");
if((lastOrient == 3 && toInterfaceOrientation == 4) || (lastOrient == 4 && toInterfaceOrientation == 3)){
lastOrient = toInterfaceOrientation;
return NO;
}
lastOrient = toInterfaceOrientation;
return YES;
}
Where 3= landscape left and 4= landscape right
Any suggestions on how to do this with iOS6? Or a completely different solution?
shouldAutorotateToInterfaceOrientation is deprecated in ios6. Use this:
- (BOOL)shouldAutorotate {
UIInterfaceOrientation orientation = [[UIDevice currentDevice] orientation];
if (lastOrientation==UIInterfaceOrientationPortrait && orientation == UIInterfaceOrientationPortrait) {
return NO;
}
return YES;
}
Haven't tested this code. You can get more info on these posts:
shouldAutorotateToInterfaceOrientation is not working in iOS 6
shouldAutorotateToInterfaceOrientation not being called in iOS 6
Ok I answered my own question here:
The good news is, there is definitely a way to do this! So heres the basics:
In iOS6, it is up to the appDelegate to handle whether the app can rotate in general. Then, when the device gets a rotation signal, it will ask your view for its supported orientations. This is where I implemented my code. In fact, shouldAutorotate() plays no role in the solution.
So I create a variable to keep track of the last orientation, and change it in
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration{
This way I can compare orientations
-(NSUInteger)supportedInterfaceOrientations
{
NSLog(#"Last Orient = %d", lastOrient);
NSUInteger orientations = UIInterfaceOrientationMaskPortrait;
if (lastOrient != 3 && lastOrient != 4) {
NSLog(#"All good, rotate anywhere");
return UIInterfaceOrientationMaskAllButUpsideDown;
}
else if(lastOrient == 3){
orientations |= UIInterfaceOrientationMaskLandscapeRight;
NSLog(#"Can only rotate right");
}
else if(lastOrient == 4){
orientations |= UIInterfaceOrientationMaskLandscapeLeft;
NSLog(#"Can only rotate left");
}
return orientations;
}
Seems to work for me. Slightly a hack, but it does what it needs to do
I want to know the device orientation when user start my app , in order to produce different view. What I find strange is as below:
- (void)viewDidLoad
{
if ([UIDevice currentDevice].orientation == UIDeviceOrientationPortrait) {
NSLog(#"1");
}
if ([UIDevice currentDevice].orientation == UIDeviceOrientationLandscapeRight) {
NSLog(#"2");
}
if ([UIDevice currentDevice].orientation == UIDeviceOrientationLandscapeLeft) {
NSLog(#"3");
}
if ([UIDevice currentDevice].orientation == UIDeviceOrientationPortraitUpsideDown) {
NSLog(#"4");
}
}
No one is printed! I did it on the ipad simulator and I think the orientation should be UIDeviceOrientationPortrait. Why this happen? and how to know the orientation correctly?
Try to use
[UIApplication sharedApplication].statusBarOrientation
instead of
[UIDevice currentDevice].orientation
It may be the case that the simulator simply cannot be in an orientation state (it makes no sense, as you can't really rotate your computer...) Have you checked whether it returns UIDeviceOrientationUnknown?
The documentation or UIDevice states:
You get the current orientation using the orientation property or
receive change notifications by registering for the
UIDeviceOrientationDidChangeNotification notification. Before using
either of these techniques to get orientation data, you must enable
data delivery using the beginGeneratingDeviceOrientationNotifications
method
http://developer.apple.com/library/ios/#documentation/uikit/reference/UIDevice_Class/Reference/UIDevice.html
So it is probably that you get Unkown orientation because you never started the orientation notifications generation.
You should also log the value in your viewDidLoad to confirm exactly what you receive when you get the orientation. That would be a good starting point for further investigation.
Use this :-
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
if(interfaceOrientation == UIInterfaceOrientationPortrait || interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown)
{
//code for portrait
}
else
{ //code for Landscape
}
return (interfaceOrientation == UIInterfaceOrientationLandscapeRight || interfaceOrientation == UIInterfaceOrientationPortrait ||interfaceOrientation == UIInterfaceOrientationLandscapeLeft ||interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown);
}
(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation is the delegate method oa uiviewcontroller.
According to the docs, the orientation property of UIDevice will always return 0 (i.e., UIDeviceOrientationUnknown) unless -beginGeneratingDeviceOrientationNotifications has been called first. This method will enable the accelerometer, deliver notification changes, and update the orientation property of the UIDevice singleton.
I'm trying to find out if the device is in portrait or landscape mode. My code works quite well if the device is not facing up. If it does face up (and orientation == 5), it won't distinguish between portrait and landscape. Is there anyway to determine the "orientation" in terms of landscape / portrait if the UIDeviceOrientation is FaceUp?
My code:
UIDeviceOrientation interfaceOrientation = [[UIDevice currentDevice] orientation];
NSLog(#"orientation: %d", interfaceOrientation);
if (interfaceOrientation == UIDeviceOrientationIsLandscape(interfaceOrientation)) {
NSLog(#"LANDSCAPE!!!");
}
if (interfaceOrientation == UIDeviceOrientationIsPortrait(interfaceOrientation)) {
NSLog(#"PORTRAIT!!!");
}
You should not confuse UIDeviceOrientation and UIInterfaceOrientation, they are different but related as shown by their declaration
typedef enum {
UIDeviceOrientationUnknown,
UIDeviceOrientationPortrait,
UIDeviceOrientationPortraitUpsideDown,
UIDeviceOrientationLandscapeLeft,
UIDeviceOrientationLandscapeRight,
UIDeviceOrientationFaceUp,
UIDeviceOrientationFaceDown
} UIDeviceOrientation;
typedef enum {
UIInterfaceOrientationPortrait = UIDeviceOrientationPortrait,
UIInterfaceOrientationPortraitUpsideDown = UIDeviceOrientationPortraitUpsideDown,
UIInterfaceOrientationLandscapeLeft = UIDeviceOrientationLandscapeRight,
UIInterfaceOrientationLandscapeRight = UIDeviceOrientationLandscapeLeft
} UIInterfaceOrientation;
UIDeviceOrientation tells you what the orientation of the device is. UIInterfaceOrientation tells you what the orientation of your interface is, and is used by UIViewController. UIInterfaceOrientation will clearly be either portrait or landscape, whereas UIDeviceOrientation can have ambiguous values (UIDeviceOrientationFaceUp, UIDeviceOrientationFaceDown, UIDeviceOrientationUnknown).
In any case you should not attempt to determine the orientation of a UIViewController with [[UIDevice currentDevice] orientation], as no matter what the device orientation is the UIViewController interfaceOrientation property can be different (for example if your app does not rotate to landscape at all [[UIDevice currentDevice] orientation] can be UIDeviceOrientationLandscapeLeft while viewController.interfaceOrientation can be UIInterfaceOrientationPortrait).
Update:
As of iOS 8.0, [UIViewController interfaceOrientation] is deprecated. An alternative offered here is [[UIApplication sharedApplication] statusBarOrientation]. This also returns UIInterfaceOrientation.
I make this code skeleton for dealing with wanted & unwanted devices orientations, in my case i want to ignore the UIDeviceOrientationUnknown, UIDeviceOrientationFaceUp and UIDeviceOrientationFaceDown, caching the last allowed orientation. This code deals with iPhone and iPad devices and can be useful for you.
- (void)modXibFromRotation {
UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];
NSString *device = [[UIDevice currentDevice]localizedModel];
UIInterfaceOrientation cachedOrientation = [self interfaceOrientation];
if ([device isEqualToString:#"iPad"]) {
if (orientation == UIDeviceOrientationUnknown ||
orientation == UIDeviceOrientationFaceUp ||
orientation == UIDeviceOrientationFaceDown) {
orientation = (UIDeviceOrientation)cachedOrientation;
}
if (orientation == UIDeviceOrientationLandscapeLeft || orientation == UIDeviceOrientationLandscapeRight) {
/* Your code */
}
if (orientation == UIDeviceOrientationPortrait || orientation == UIDeviceOrientationPortraitUpsideDown) {
/* Your code */
}
}
if ([device isEqualToString:#"iPhone"] || [device isEqualToString:#"iPod"]) {
if (orientation == UIDeviceOrientationUnknown ||
orientation == UIDeviceOrientationFaceUp ||
orientation == UIDeviceOrientationFaceDown) {
orientation = (UIDeviceOrientation)cachedOrientation;
}
if (orientation == UIDeviceOrientationLandscapeLeft || orientation == UIDeviceOrientationLandscapeRight) {
/* Your code */
}
if (orientation == UIDeviceOrientationPortrait || orientation == UIDeviceOrientationPortraitUpsideDown) {
/* Your code */
}
}
}
As of iOS13 use
UIInterfaceOrientation orientation;
if (#available(iOS 13.0, *)) {
orientation = self.window.windowScene.interfaceOrientation;
} else {
orientation = [[UIApplication sharedApplication] statusBarOrientation];
}
I am having an issue in my application which drives me mad. In my application, I rotate the simulator to the landscape mode, but in my below function, I get portrait orientation.
What is the problem here? Please help me out.
-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
if ( interfaceOrientation == UIInterfaceOrientationPortrait ||
interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown )
{
NSLog(#" portrait orientation");
}
else
{
NSLog(#"Landscape");
}
return YES;
}
First set the orientation value is the method
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Overriden to allow any orientation.
NSLog(#"shouldAutorotateToInterfaceOrientation called...");
if (interfaceOrientation == UIInterfaceOrientationPortrait || interfaceOrientation == UIDeviceOrientationPortraitUpsideDown)
defaultOrientation = 0;
else if(interfaceOrientation == UIInterfaceOrientationLandscapeLeft || interfaceOrientation == UIInterfaceOrientationLandscapeRight)
defaultOrientation = 1;
[self setTheOrientation];
return YES;
}
Now set the values of the coordinates which you require according to the boolean values in the setTheOrientation method.
The method returns BOOL, you have to return either YES or NO
Why you did't return a BOOL value? YES or NO to tell the OS that you're gonna handle corresponding orientation events.
If you want portrait mode then add return TRUE in if clouse and If you want landscape then add return TRUE in else clouse and if you want both mode then just type return TRUE in shouldAutoRotate clouse
In my iPhone app I need to detect the current orientation and I have to determine if I'm in portrait or landscape. I use this code:
UIInterfaceOrientation orientation = [[UIDevice currentDevice] orientation];
if (orientation == UIInterfaceOrientationPortrait || orientation == UIInterfaceOrientationPortraitUpsideDown) {
NSLog(#"portrait");
...
} else {
NSLog(#"landscape");
...
}
Everything is ok when my iPhone is in my hand.
But when i put it on the table and i run the application, the content is displayed on the screen in portrait mode and my code goes to else and NSLog prints landscape.
Is my test incomplete ? How to prevent this case ?
EDIT : the test is performed in my controller viewDidLoad method and my application handle rotation.
UIDevice.orientation is of type UIDeviceOrientation, which is a superset of UIInterfaceOrientation. You are probably getting the value UIDeviceOrientationFaceUp.
This underscores that yes, your test is incomplete. You should write something like this:
UIInterfaceOrientation orientation = [[UIDevice currentDevice] orientation];
if (orientation == UIInterfaceOrientationPortrait || orientation == UIInterfaceOrientationPortraitUpsideDown) {
NSLog(#"portrait");
...
} else if (orientation == UIInterfaceOrientationLandscapeLeft || orientation == UIInterfaceOrientationLandscapeRight) {
NSLog(#"landscape");
...
} else {
NSLog(#"WTF? %d", orientation);
assert(false);
}
Then, you'll know if you if you've missed something.
UIDevice.orientation can return that the device is flat or upside down (not inverted portrait, upside-down as in laying on its face). Instead call UIViewController.interfaceOrientation on your root view controller.
I would recommend using UIDeviceOrientationIsValidInterfaceOrientation(orientation)
It will tell you if its a valid orientation (valid being either landscape or portrait, not FaceUp/FaceDown/UnKnown). Then you can treat it as if its portrait if its unknown.
This is how I do it:
if (UIDeviceOrientationIsValidInterfaceOrientation(interfaceOrientation) && UIInterfaceOrientationIsLandscape(interfaceOrientation)) {
// handle landscape
} else {
// handle portrait
}