How to flip an individual UIView (without flipping the parent view) - objective-c

Question

This is an iPad project where I have a UIView with several subViews, and I am trying to animate one of this UIViews using [UIView transitionFromView:toView:duration:options:completion], but when I run this method the whole parent view gets flipped!
This is the code I'm using:
UIView *secondView = [[UIView alloc] initWithFrame:CGRectMake(200, 200, 300, 300)];
[newView setBackgroundColor:[UIColor redColor]];
[UIView transitionFromView:self.firstView.view toView:secondView duration:1.0 options:UIViewAnimationOptionTransitionFlipFromLeft completion:nil];
Any idea on how can I flip between this views without animating the whole parent view?
Thanks!

Answer 1

this code may helps you:
put the two views you want to flip inside an unnamed view with the same size
and link the IBOutlet UIView *newView,*oldView; to the views and put the new view on top
bool a = NO;
#implementation ViewController
- (IBAction)flip:(id)sender
{
if (a == NO) {
[UIView transitionFromView:oldView toView:newView
duration:1.0
options:UIViewAnimationOptionTransitionFlipFromLeft
completion:NULL];
a = YES; // a = !a;
}
else {
[UIView transitionFromView:newView toView:oldView
duration:1.0
options:UIViewAnimationOptionTransitionFlipFromLeft
completion:NULL];
a = NO; // a = !a;
}
}

Answer 2

I had problems getting this to work also. I used the code written by Floris, but although it worked for the first "flip" the next flip started to go weird where the buttons and labels on the frontside UI View lost there positions.
I put the code below into place and it is working fine.
Couple of things to note:
panelView is a UIView control on the ViewController that has two other UIViews nested inside it (subviews). The first one is called frontView, second one is called backView. (see picture below)
I have a bool property called displayingFront on the class
(in my .h)
#property BOOL displayingFront;
in my .m
#synthesize displayingFront;
in my viewDidLoad method
self.displayingFront = YES;
This is the code in the .m that i have rigged up to the two buttons if front and back UIViews...
- (IBAction)flip:(id)sender
{
[UIView transitionWithView:self.panelView
duration:1.0
options:(displayingFront ? UIViewAnimationOptionTransitionFlipFromRight :
UIViewAnimationOptionTransitionFlipFromLeft)
animations: ^{
if(displayingFront)
{
self.frontView.hidden = true;
self.backView.hidden = false;
}
else
{
self.frontView.hidden = false;
self.backView.hidden = true;
}
}
completion:^(BOOL finished) {
if (finished) {
displayingFront = !displayingFront;
}
}];
}

Answer 3

Use a container view to hold your subviews, and make the container view the same size as your subview that you're trying to animate.
So, you can setup your views like this.
self.view-> "a container view" -> subviews

Answer 4

**//flipping view continuously**
bool a = NO;
-(void)viewDidLoad
{
// THIS is the canvass holding the two views this view is flipping
UIView *v=[[UIView alloc]initWithFrame:CGRectMake(40, 40, 150, 150)];
v.backgroundColor=[UIColor clearColor];
[self.view addSubview:v];
[v addSubview:yourfirstview];
[v addSubview:yoursecondview];
// calling the method
[NSTimer scheduledTimerWithTimeInterval:2.0
target:self
selector:#selector(flip)
userInfo:nil
repeats:YES];
}
//flipping view randomly
-(void)flip
{
if (a == NO)
{
[UIView transitionFromView:yourfirstview toView:yoursecondview duration:1.0 options:UIViewAnimationOptionTransitionFlipFromLeft completion:NULL];
a = YES;
}
else if(a==YES)
{
[UIView transitionFromView:yoursecondview toView:yourfirstview duration:1.0 options:UIViewAnimationOptionTransitionFlipFromLeft completion:NULL];
a = NO;
}
}

Answer 5

I fixed this problem by using old-school animations:
[UIView beginAnimations:#"Flip" context:nil];
[UIView setAnimationDuration:1];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:firstView cache:YES];
[self addSubview:secondView];
[UIView commitAnimations];
Additionally you can remove the firstView:
[firstView removeFromSuperview];

Answer 6

I'd like to make an update of Steve Parker's answer in SWIFT 4:-
var displayBlankView:Bool = true
UIView.transition(with:flipView, duration:1.0, options:displayBlankView ? .transitionFlipFromLeft:.transitionFlipFromRight, animations:{
if(self.displayBlankView){
self.view1.isHidden=true
self.view2.isHidden=false
}else{
self.view1.isHidden=false
self.view2.isHidden=true
}
}, completion:{
(finished: Bool) in
self.displayBlankView = !self.displayBlankView;
})