Trying to load new view upon orientation change - objective-c

Question

I am trying to create an application in Xcode that will switch to a new view when the phone is rotated from one orientation to another.
Here is the "switchviewcontroller.h" file code:
#import <UIKit/UIKit.h>
#interface SwitchViewController : UIViewController {
}
-(IBAction)switchview:(id)sender;
#end
And here is the "switchviewcontroller.m" file code:
#import "SwitchViewController.h"
#import "secondview.h"
#implementation SwitchViewController
-(IBAction)switchview:(id)sender {}
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return YES;
}
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
if((fromInterfaceOrientation == UIInterfaceOrientationLandscapeLeft) ||
(fromInterfaceOrientation == UIInterfaceOrientationLandscapeRight))
{
[[secondview alloc] initWithNibName:#"secondview" bundle:[NSBundle mainBundle]];
}
}
It runs in iPhone simulator with no errors, but, when I rotate it doesn't load the new view. For starters I think I need the app to open in landscape mode, which I don't know how to do, but it still wouldn't work anyway and I think it has something to to with the "initWithNibName" part of the code because I have .xib files and not .nib files. Can anyone help me with these 2 things? Thanks.

Answer 1

You are not pushing or presenting anything, you are only init'ing the view.
secondview *second = [[secondview alloc] initWithNibName:#"secondview" bundle:[NSBundle mainBundle]];
[self.navigationController pushViewController:second animated:YES];
However, its not a good place to show a new view.
If you want to show the same view in a different orientation, try something this:
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
if(((interfaceOrientation == UIInterfaceOrientationLandscapeLeft) ||
(interfaceOrientation == UIInterfaceOrientationLandscapeRight))){
self.view = landscape;
}else if(((interfaceOrientation == UIInterfaceOrientationPortrait) ||
(interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown))){
self.view = portrait;
}
return YES;
}
Note that portrait and landscape are UIViews in your UIViewController that you define in your header and connect through Interface Builder.
Additionaly, these need to be in .h / .m:
.h
IBOutlet UIView *portrait;
IBOutlet UIView *landscape;
#property(nonatomic,retain) UIView portrait;
#property(nonatomic,retain) UIView landscape;
.m
#synthesize portrait,landscape;

Answer 2

You've got to alloc and init a new view and replace you current viewcontroller's view with the new one.
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {
if (UIInterfaceOrientationIsLandscape(self.interfaceOrientation) {
UIView *landscapeView = [[UIView alloc] init];
// Setup the landscape view here
self.view = landscapeView;
[landscapeView release];
}
else {
UIView *portraitView = [[UIView alloc] init];
// Setup the portrait view here
self.view = portraitView;
[portraitView release];
}
}