How do i refresh a UIView when Orientation happens? - iphone

Question

My code goes like this:
- (void)viewDidLoad
{
[self setGridView];
}
-(void)setGridView
{
CGRect frame;
frame .origin.x=0;
frame.origin.y=20;
frame.size.width=GRID_WEIGHT;
frame.size.height=GRID_HEIGHT;
GridView *ObjGridView=[[GridView alloc]initWithFrame:frame];
[[NSBundle mainBundle ] loadNibNamed:#"GridView" owner:ObjGridView options:nil];
[ObjGridView setGridViewFrame:frame];
[self.view addSubview:ObjGridView.GridCellView];
frame .origin.x+=GRID_WEIGHT;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return YES;
}
This code adds a subview to a view and sets the frame
My problem:
1-How do i refresh my view when Orientation(landscape or portrait) happens,
because i set the frame of subview in the lanscape mode and i wants to use the sane view in my portrait view also .(basically where do i call this -(void)setGridView delegate method)?
2-How do i know, my subview exceeding the bound of the view,so that i can handle the subview in my setGridView method ?

Answer 1

1.Below method will call automatically whenever your orientation changes. Do the necessary changes according to each orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
if (interfaceOrientation == UIInterfaceOrientationPortrait) {}
else if (interfaceOrientation == UIInterfaceOrientationLandscapeLeft) {}
else if (interfaceOrientation == UIInterfaceOrientationLandscapeRight) {}
else if (interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown) {}
return YES;
}
2.You should know the width and height of your views and set the frames accordingly. That is not a big deal.
Hope this is helpful.

Answer 2

I am learning the ins and outs of iOS Application development myself, so please forgive me for the brevity of my response.
I believe you may be able to find the answer to your issue within the section titled 'Responding to Orientation Changes' within this document on Apple's Developer Resources:
http://developer.apple.com/library/ios/#featuredarticles/ViewControllerPGforiPhoneOS/RespondingtoDeviceOrientationChanges/RespondingtoDeviceOrientationChanges.html
I hope this helps you deduce a resolution to your issue.

Answer 3

In viewDidLoad
[[NSNotificationCenter defaultCenter]addObserver:self selector:#selector(OrientationChange:) name:UIDeviceOrientationDidChangeNotification object:nil];
Method for notify you that Orientation Changed:-
-(void)OrientationChange:(NSNotification*)notification
{
UIDeviceOrientation Orientation=[[UIDevice currentDevice]orientation];
if(Orientation==UIDeviceOrientationLandscapeLeft || Orientation==UIDeviceOrientationLandscapeRight)
{
NSLog(#"Landscape");
}
else if(Orientation==UIDeviceOrientationPortrait)
{
NSLog(#"Portrait");
}
}

Answer 4

In response to your questionsL
With regard to resizing on orientation change:
If you set your springs and struts accordingly it should autoresize automatically, alternatively you can do this in code as per deamonsarea's answer
To check if a view is exceeding the bounds of the superview use CGRectContainsRect
something like.
CGRect frame0 = self.view.bounds;
CGRect frame1 = ObjGridView.frame;
if(CGRectContainsRect(frame0,frame1)==NO){
NSLog(#"exceeds bounds")
}
Also noticed you are not calling [super viewDidLoad] and this line
[[NSBundle mainBundle ] loadNibNamed:#"GridView" owner:ObjGridView options:nil];
loads a new instance of the view but you are not refering to it anywhere

Answer 5

I found this question while looking for a way to react to orientation change inside the UIView itself. In case anyone else comes along...
If you want to react to orientation change inside a UIView, rather than a UIViewController (for encapsulation or other reasons), you can use this method:
class MyView: UIView {
override func layoutSubviews() {
super.layoutSubviews()
println("orientation or other bounds-impacting change")
}
}