How to get iPhones current orientation?

问题

Is there a special method to get iPhones orientation? I don't need it in degrees or radians, I want it to return an UIInterfaceOrientation object. I just need it for an if-else construction like

if(currentOrientation==UIInterfaceOrientationPortrait ||currentOrientation==UIInterfaceOrientationPortraitUpsideDown) {
//Code
}  
if (currentOrientation==UIInterfaceOrientationLandscapeRight ||currentOrientation==UIInterfaceOrientationLandscapeLeft ) {
//Code
}

Thanks in advance!

回答1:

This is most likely what you want:

UIInterfaceOrientation interfaceOrientation = [[UIApplication sharedApplication] statusBarOrientation];

You can then use system macros like:

if (UIInterfaceOrientationIsPortrait(interfaceOrientation))
{

}

If you want the device orientation use:

UIDeviceOrientation deviceOrientation = [[UIDevice currentDevice] orientation];

This includes enumerations like UIDeviceOrientationFaceUp and UIDeviceOrientationFaceDown

回答2:

As discussed in other answers, you need the interfaceOrientation, not the deviceOrientation.

The easiest way to get to this, is to use the property interfaceOrientation on your UIViewController. (So most often, just: self.interfaceOrientation will do).

Possible values are:

UIInterfaceOrientationPortrait           = UIDeviceOrientationPortrait,
UIInterfaceOrientationPortraitUpsideDown = UIDeviceOrientationPortraitUpsideDown,
UIInterfaceOrientationLandscapeLeft      = UIDeviceOrientationLandscapeRight,
UIInterfaceOrientationLandscapeRight     = UIDeviceOrientationLandscapeLeft

Remember: Left orientation is entered by turning your device to the right.

回答3:

Here is a snippet of code I hade to write because I was getting wierd issues coming back into my root view when the orientation was changed .... I you see just call out the method that should have been called but did seem to be .... this works great no errors

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];

    if ([[UIDevice currentDevice]orientation] == UIInterfaceOrientationLandscapeLeft){
        //do something or rather
        [self 
shouldAutorotateToInterfaceOrientation:UIInterfaceOrientationLandscapeLeft];
        NSLog(@"landscape left");
    }
    if ([[UIDevice currentDevice]orientation] == UIInterfaceOrientationLandscapeRight){
        //do something or rather
        [self 
shouldAutorotateToInterfaceOrientation:UIInterfaceOrientationLandscapeRight];
        NSLog(@"landscape right");
    }
    if ([[UIDevice currentDevice]orientation] == UIInterfaceOrientationPortrait){
        //do something or rather
        [self shouldAutorotateToInterfaceOrientation:UIInterfaceOrientationPortrait];
        NSLog(@"portrait");
    }
}

回答4:

UIInterfaceOrientation is now deprecated, and UIDeviceOrientation includes UIDeviceOrientationFaceUp and UIDeviceOrientationFaceDown so can't be relied on to give you the interface orientation.

The solution is pretty simple though

if (CGRectGetWidth(self.view.bounds) > CGRectGetHeight(self.view.bounds)) {
    // Landscape
} else {
    // Portrait
}

来源：https://stackoverflow.com/questions/2518695/how-to-get-iphones-current-orientation

标签

objective-c

accelerometer