Is there a way to manually check current position of device AND ask device to automatically rotate it without waiting for user to actually rotate the device?
Currently I control the rotation with several IFs in -shouldAutorotateToInterfaceOrientation but in few situations I have to stop the view from rotating and enable it again and I don't want user to rotate the device twice to have the desired orientation.
for checking Orientation
UIInterfaceOrientation orientation = [[UIDevice currentDevice] orientation];
then based on your condition you can change device orientation as you wish..
you can use :
[UIApplication sharedApplication].statusBarOrientation = UIInterfaceOrientationPortrait;
or what ever you want.
or you can go for following but this is not do
[[UIDevice currentDevice] setOrientation:UIDeviceOrientationPortrait];
Related
I am trying to decide if I should implement landscape mode in my application. Is there an analytics software that will tell me if users try to view my app in landscape mode? Or should I write me own methods?
You can use heatma.ps SDK to view statistics for each screen of your application. It's automatic so you don't have to implement orientation support to find out.
It's hard to tell given the shouldAutorotateToInterfaceOrientation: call is made for all orientations no matter whether the user tries to go to landscape mode, and the willRotate/didRotate callbacks are only made for supported orientations. What you could do is log the
[[UIDevice currentDevice] orientation];
on each shouldAutorotateToInterfaceOrientation. Or register for the UIDeviceOrientationDidChangeNotification notification. This returns a UIDeviceOrientation, no matter the orientation of you view controllers. Note that this is different from the UIInterfaceOrientation values which UIViewControllers use for the interfaceOrientation property.
typedef enum {
UIDeviceOrientationUnknown,
UIDeviceOrientationPortrait,
UIDeviceOrientationPortraitUpsideDown,
UIDeviceOrientationLandscapeLeft,
UIDeviceOrientationLandscapeRight,
UIDeviceOrientationFaceUp,
UIDeviceOrientationFaceDown
} UIDeviceOrientation;
Although the two are related:
typedef enum {
UIInterfaceOrientationPortrait = UIDeviceOrientationPortrait,
UIInterfaceOrientationPortraitUpsideDown = UIDeviceOrientationPortraitUpsideDown,
UIInterfaceOrientationLandscapeLeft = UIDeviceOrientationLandscapeRight,
UIInterfaceOrientationLandscapeRight = UIDeviceOrientationLandscapeLeft
} UIInterfaceOrientation;
You can use Google Analytics User Timings to measure the time interval a user spends in a specific orientation. You can read about tracking user timings for native ios apps at
https://developers.google.com/analytics/devguides/collection/ios/v2/usertimings
I have an iPad in which I start at a landscape left orientation, however when I do:
UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];
it doesn't detect it as landscape left. I had to rotate it to portrait mode and then back to landscape left again, and then when I check the orientation, now it's correct. However, initially when it's launched it is not correct. Why is this? How do I resolve this?
Never use the Device Orientation if you would like to determine the Interface Orientation!
If you have a reference to the RootViewController of your main window, you could ask it for its interfaceOrientation.
If you don't, use [UIApplication sharedApplication].statusBarOrientation to determine the Interface Orientation.
What's the difference between UIDeviceOrientation & UIInterfaceOrientation ?
Which one should I use to detect rotation on a UIView?
UIDeviceOrientation gives you information about the physical device itself while UIInterfaceOrientation tells you about the orientation of the views it is displaying. These do not need to match; when a user uses the orientation lock or if the the device orientation is face up.
You probably want to be checking UIInterfaceOrientation and the rotation methods on UIViewController to determine when views have been or should be rotated.
UIDeviceOrientation refers to the physical orientation of the device whereas UIInterfaceOrientation refers to the orientation of the user interface.
So what you need to set is the autoResizeMask so that the view is resized correctly when its superview is resized. Set flexibleWidth and flexibleHeight for the view. Check http://developer.apple.com/library/ios/#documentation/UIKit/Reference/UIDevice_Class/Reference/UIDevice.html
Also - refer to
UIDEVICE orientation
UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation]
I'm listening to the UIDeviceOrientationDidChangeNotification in order to adjust my UI based on the device's orientation.
The problem is that the device orientation I'm getting from the notification seems inaccurate. If I start with the phone in portrait orientation and vertical (as if taking a picture with it) the orientation I get from the notification is correct. As the tilt of the phone approaches horizontal (as in laying flat on a table top) the orientation switches to landscape. This happens much before the phone is actually flat on the table. And this is without rotating the phone towards landscape at all. Is as if it had a preference for landscape.
When using other apps, like mail, I don't see this same behavior. It seems that mail only switches orientation once it's really sure you've gone to the new orientation.
Any help greatly appreciated.
Thanks,
I found my problem.
In viewWillAppear I have:
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver: self selector: #selector(didChangeOrientation:) name: UIDeviceOrientationDidChangeNotification object:
[UIDevice currentDevice]];
And here is the notification handler:
- (void) didChangeOrientation: (id)object {
UIInterfaceOrientation interfaceOrientation = [[object object] orientation];
//DLog(#"val is %i", interfaceOrientation);
if (interfaceOrientation == UIDeviceOrientationLandscapeLeft || interfaceOrientation == UIDeviceOrientationLandscapeRight || interfaceOrientation == UIDeviceOrientationPortrait) {
[self orientInterface:interfaceOrientation];
}
By checking that the orientation is one of the two landscapes or the two portraits I'm ignoring the UIDeviceOrientationFaceUp and UIDeviceOrientationFaceDown orientations. That way setting the phone in one of this two orientations won't have an effect on my interface's orientation.
My problem was that I was no considering the faceUp and faceDown and was handling them both in an else statement which was assuming landscape.
If your only interest is your interface orientation (ie landscape or portrait orientation of the device), you should NOT use UIDevice:orientation (or the UIDeviceOrientation* constants if you will), but rather use the UIApplication:statusBarOrientation, which uses the UIInterfaceOrientation* constants.
I use the following code to check for landscape modus:
static inline bool isOrientationIsLandscape() {
return UIInterfaceOrientationIsLandscape([[UIApplication sharedApplication] statusBarOrientation]);
}
And for portrait modus:
static inline bool isOrientationIsPortrait() {
return UIInterfaceOrientationIsPortrait([[UIApplication sharedApplication] statusBarOrientation]);
}
This cost me a whole morning to figure out, because there is no UIDeviceOrientationFace[Up|Down] on the simulator, only on the real device. So my app worked on the simulator all the time, but on the actual device I had some undefined behavoir during testing every now and then.
Now it works on the actual device like it does on the simulator.
HTH
The notifications are just one way to get at it, you can also read out the accelerometer yourself and implement it in exactly the way you see fit (with a delay and a certain time of non-rotation for example).
Don't know if it's a power drain to get those readouts, but if so, use the notification to know when things are moving, and then fire up the accelometer-reading.
i have to do something on rotation the device on the portrait mode but when i use the
(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
//[[[UIApplication sharedApplication]keyWindow]subviews removeFromSuperview ];
// return (interfaceOrientation == UIInterfaceOrientationLandscapeRight);
return YES;
}
following code and it work fine on the simulator but when i use to install the code in the device it make the device so much sensitive that if i just a little change the position in the device it execute this code and go to the view that i m showing on the rotation of the phone
than pls anyone tell me that how can i control the sensitivity of the device i mean that i just want when user complete a 90' rotation in the position than my code should execute but it just execute if just shake the phone in the same position .
thanks for any help
Balraj verma
You probably want to buffer the orientation information; that is, only change the orientation after you have received several indications from the sensor in a row that the orientation is different from what you're currently displaying.
From my understanding of what you have written, your application is too sensitive when the device is rotated? It's difficult to understand why this is; the code you've included states that you're application is willing to accept any rotation, but you've not stated how you deal with the rotation events afterwards.
Based on the info, I can only suggest that you add a check to in your code (perhaps where the rotation event is dealt with) and obtain the orientation from the device using:
[[UIDevice currentDevice] orientation];
which will return a UIInterfaceOrientation enum stating the current orientation of the device.
UIDeviceOrientationPortrait
UIDeviceOrientationPortraitUpsideDown
UIDeviceOrientationLandscapeLeft
UIDeviceOrientationLandscapeRight
You can then use this to establish whether there's a need to change the orientation. (Note: this is iPhone OS 2.0. I believe that OS 3.0 has more including lying face up/down, etc.)
- (void) didRotate:(NSNotification *)notification
{
UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];
if (orientation == UIDeviceOrientationLandscapeRight)
{
NSLog(#"Landscape Right!");
}
}
If you find that the orientation switches too quickly you may want to buffer the information, creating several sample points that you can compare before switching to the new orientation.