rearranging UIButtons while orientation changes in iphone? - iphone

Question

enter image description herehai, i have a list of buttons in a view which is a sub view of another UIView. i need to rearrange these buttons in order while the device orientation changes to landscape mode.
is their any way to do this? or else i need to do all these things manually by repositioning all buttons?

Answer 1

shouldAutorotateToInterfaceOrientation:, mentioned in the other answers, is for letting your view controller decide whether or not to allow autorotation to a given orientation. (you're supposed to return YES or NO).
If you really want to programmatically adjust layout of your subviews, you would do it in either
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
[UIView animateWithDuration: duration
delay: 0.0f
options: UIViewAnimationOptionCurveLinear
animations: ^(void) {
if (UIInterfaceOrientationIsPortrait(toInterfaceOrientation)) {
self.button.frame = CGRectMake(x1, y1, self.button.frame.size.width, self.button.frame.size.height);
} else {
self.button.frame = CGRectMake(x2, y2, self.button.frame.size.width, self.button.frame.size.height);
}
}
completion: ^(BOOL finished) {
// code to run after animation completes can go here
}];
}
or, you can use willAnimateRotationToInterfaceOrientation:duration: for one-step rotations.
Not only is it only called when the autorotation actually happens, but it gives you the duration of the animation. This allows you to wrap any animatable view property changes inside your own animation, so that they smoothly animate during the rotation, instead of just snapping to their new values.
But, really, this is usually not the best way to solve the problem. See this link for a more general discussion of the issue

Answer 2

Change the CGFrame of you buttons in the
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
if(interfaceOrientation==UIInterFaceOrientationPortrait)
{
Button1.frame=...;
Button2.frame=....;
}
else if(interfaceOrientation==UIInterFaceOrientationLandscapeLeft)
{
Button1.frame=...;
Button2.frame=....;
}
return YES;
}

Answer 3

1-you can use this
YOUR_OBJECT.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleLeftMargin |
UIViewAutoresizingFlexibleRightMargin;
OR
2- use frame property with CGRectMake for your object in
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
if(interfaceOrientation==UIInterFaceOrientationPortrait)
else if(interfaceOrientation==UIInterFaceOrientationLandscapeLeft)

Answer 4

You can handle it via
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
method.
Make two methods in your viewController.h class assume they are -
-(void)viewForPortraitMode;
-(void)viewForLandscapeMode;
And this is the body part of both in your viewcontroller.m file.
//Set frame according to you
-(void)viewForPortraitMode
{
[btn1 setFrame:CGRectMake(117.0, 383.0, 87.0, 37.0)];
[btn2 setFrame:CGRectMake(40.0, 20.0, 240.0, 324.0)];
}
-(void)viewForLandscapeMode
{
[btn1 setFrame:CGRectMake(200.0, 252, 87.0, 37.0)];
[btn2 setFrame:CGRectMake(20.0, 7.0, 446.0, 228.0)];
}
And call these two methods in this
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
if(interfaceOrientation == UIInterfaceOrientationPortrait || interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown)
{
[self viewForPortraitMode];
}
else
{
[self viewForLandscapeMode];
}
return YES;
}