I am trying to animate my image by having it rotate clockwise, and shrink down. So far, it is only going counter-clockwise. I have tried both positive and negative values for the value/Key path of rotating along Z, but it changed nothing.
[window addSubview:splashView];
[window bringSubviewToFront:splashView];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:2.0];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:#selector(startupAnimationDone:finished:context:)];
splashView.frame = CGRectMake(160, 284, 0, 0);
[splashView.layer setValue:[NSNumber numberWithInt:-360]
forKeyPath:#"transform.rotation.z"];
[UIView commitAnimations];
To rotate in specific direction more than 360°use CAKeyframeAnimation. There you can set not only the final value, but also some intermediate values.
// consider this to be pseudo code
keyFrameAnimation.values = #[ 90, 180, 270, 360, 450, 540, ... ];
I don't have any code to show you, but this is defnitely the way to do it.
Or just use M_PI directly.
M_PI_4 = 45 degrees
M_PI_2 = 90 degrees
M_PI = 180 degrees
M_PI*2 = 360 degrees
You can also set your transform more easily.
// set transform
splashView.layer.transform = CATransform3DMakeRotation(-M_PI*2, 0, 0, 1);
instead of
[splashView.layer setValue:[NSNumber numberWithInt:-360]
forKeyPath:#"transform.rotation.z"];
That's because you're passing degrees to the animation when it wants radians. Here's an example of how to make the conversion.
float degrees = 90.0f;
float radians = degrees * (180.0f / M_PI);
Related
i have two images(iphoneImage , ipadImage) and i want to move ipadImage and rotate iphoneImage but when i use CGAffineTransform on iphoneImage it blocks ipadImage Move ??
so any suggestions
CGRect tempRect=CGRectMake(-351, self.ipadImage.frame.origin.y,
self.ipadImage.frame.size.width,
self.ipadImage.frame.size.height);
CGAffineTransform transform=_iphoneImage.transform;
transform = CGAffineTransformRotate(transform, M_PI * 90 / 180.0);
[UIView animateWithDuration:2
animations:^{
_ipadImage.frame=tempRect;
_iphoneImage.transform=transform;
}];
I have a large bitmap in Xcode, on which a popup (UIView) is placed. Per default, it's hidden and is visible when pressing a button.
When visible, a x/y position is set... and it works.
After positioning, I want the popup appear with a scale-effect. This also works; however, the x/y positioning is ignored and the popup just appears where it's positioned in the Storyboard editor.
// Set position
minPopupFrame.origin.x = (_destinationensKoordinater[0] - minPopupFrame.size.width/2 + offsetX) * zoomfaktor;
minPopupFrame.origin.y = (_destinationensKoordinater[1] - minPopupFrame.size.height + offsetY) * zoomfaktor;
_popup.frame = minPopupFrame;
// Scale it to .1
_popup.transform = CGAffineTransformMakeScale(.1, .1);
_popup.hidden = NO;
// Set size to 100% in .3 seconds
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:.3];
_popup.transform = CGAffineTransformMakeScale(1, 1);
[UIView commitAnimations];
It's quite basic coding - but why doesn't it work? Suggestions, pretty please?
EDIT: I've also tried something like this - but the code is completely ignored:
_popup.hidden = NO;
CGAffineTransform scale = CGAffineTransformMakeScale(1, 1);
CGAffineTransform translate = CGAffineTransformMakeTranslation(200, 200);
CGAffineTransform transform = CGAffineTransformConcat(translate, scale);
_popup.transform = transform;
EDIT II: I also tried this:
_popup.center = CGPointMake((_destinationensKoordinater[0] - minPopupFrame.size.width/2 + offsetX) * zoomfaktor, (_destinationensKoordinater[1] - minPopupFrame.size.height + offsetY) * zoomfaktor);
_popup.transform = CGAffineTransformMakeScale(.1, .1);
_popup.alpha = 0;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:.3];
_popup.alpha = 1;
_popup.transform = CGAffineTransformMakeScale(1, 1);
[UIView commitAnimations];
The interesting bit is that the alpha animation works, but the popup positioning is ignored, if the first _popup.transform line isn't commented out. It doesn't make sense to me
I am using Slider to Resize and Rotate-
For the Rotate -
CGAffineTransform transform = editingView.transform;
transform = CGAffineTransformMakeRotation(sliderVal * 2*M_PI / 30);
editingView.transform = transform;
For the Resize-
CGAffineTransform t = CGAffineTransformMakeScale(sliderVal/30, sliderVal/30);
CGPoint center = editingView.center;
[UIView animateWithDuration:0.5
animations:^{
editingView.transform = t;
editingView.center = center;
}
completion:^(BOOL finished) {
}];
Using the above code,Both working fine separately.
But I have to resize the rotated view,Or rotate the resized view.
I saw many suggestions coming separate behavior because i am using CGAffineTransformMakeRotation,CGAffineTransformMakeScale,If i use the CGAffineTransformScale,CGAffineTransformRotation then my problem will be solve.
The problem is when I am using CGAffineTransform then scaling is not proper,View disappears from the screen.
You're setting transformation matrix of the view with editingView.transform line.
You should change your code for rotate:
CGAffineTransform transform = editingView.transform;
transform = CGAffineTransformMakeRotation(sliderVal * 2*M_PI / 30);
editingView.transform = CGAffineTransformConcat(editingView.transform, transform);
and for resize:
CGAffineTransform t = CGAffineTransformMakeScale(sliderVal/30, sliderVal/30);
CGPoint center = editingView.center;
[UIView animateWithDuration:0.5
animations:^{
editingView.transform = CGAffineTransformConcat(editingView.transform,t);
editingView.center = center;
}
completion:^(BOOL finished) {
}];
With CGAffineTransformConcat you add 2 transform matrixes together so you won't lose older transforms. You can use CGAffineTransformIdentity to reset the transform.
CGAffineTransform translate = CGAffineTransformMakeTranslation(self.webView.frame.origin.x,self.webView.frame.origin.y - self.webView.frame.size.height * 0.25);
CGAffineTransform scale = CGAffineTransformMakeScale(0.6, 0.6);
CGAffineTransform transform = CGAffineTransformConcat(translate, scale);
transform = CGAffineTransformRotate(transform, degreesToRadians(-10));
[UIView beginAnimations:#"MoveAndRotateAnimation" context:nil];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:2.0];
editingView.transform = transform;
[UIView commitAnimations];
Try like this...
I have a CATransform3D Animation designed to replace the Push animation currently being used in my app. Currently, it rotates as if the X axis were in the centre of the layer/view. However, I want the X axis to be at the edge of the screen so it flips out of the screen. My current code is: -
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.5];
CATransform3D rotationAndPerspectiveTransform = CATransform3DIdentity;
rotationAndPerspectiveTransform.m34 = 1.0 / 500;
rotationAndPerspectiveTransform = CATransform3DRotate(rotationAndPerspectiveTransform, 1.57, 0, 1, 0);
self.view.layer.transform = rotationAndPerspectiveTransform;
[UIView commitAnimations];
I'm new to Core Graphics and such, so any pointers, tips, where I'm going wrong will be greatly appreciated!
You should change the anchorPoint of the layer. Use the following piece of code before beginAnimations:context: method.
CGRect frame = self.view.layer.frame;
self.view.layer.anchorPoint = CGPointMake(1.f, 0.5f);
self.view.layer.frame = frame;
This will change the anchorPoint of the layer without changing the layer position. The rotation animation will be done around the axis that passes from the anchor point.
I'm trying to create an animation that would look like 2 french doors (or 2 hatch doors) opening towards the user.
I tried using the built in UIViewAnimationOptionTransitionFlipFromRight transition, but the origin of the transition seems to be the center of the UIImageView rather than the left edge. Basically I have 2 UIImageViews that each fill have the screen. I would like the animation to look like the UIImageViews are lifting from the center of the screen to the edges.
[UIView transitionWithView:leftView
duration:1.0
options:UIViewAnimationOptionTransitionFlipFromRight
animations:^ { leftView.alpha = 0; }
completion:^(BOOL finished) {
[leftView removeFromSuperview];
}];
Has anyone done something like this before? Any help would be awesome!
UPDATE:
Working code thanks to Nick Lockwood
leftView.layer.anchorPoint = CGPointMake(0, 0.5); // hinge around the left edge
leftView.frame = CGRectMake(0, 0, 160, 460); //reset view position
rightView.layer.anchorPoint = CGPointMake(1.0, 0.5); //hinge around the right edge
rightView.frame = CGRectMake(160, 0, 160, 460); //reset view position
[UIView animateWithDuration:0.75 animations:^{
CATransform3D leftTransform = CATransform3DIdentity;
leftTransform.m34 = -1.0f/500; //dark magic to set the 3D perspective
leftTransform = CATransform3DRotate(leftTransform, -M_PI_2, 0, 1, 0);
leftView.layer.transform = leftTransform;
CATransform3D rightTransform = CATransform3DIdentity;
rightTransform.m34 = -1.0f/500; //dark magic to set the 3D perspective
rightTransform = CATransform3DRotate(rightTransform, M_PI_2, 0, 1, 0);
rightView.layer.transform = rightTransform;
}];
First add the QuartzCore library to your project and #import <QuartzCore/QuartzCore.h>
Every view has a layer property with sub-properties that are animatable. This is where you'll find all the really cool stuff when it comes to animation capabilities (I suggest reading up on the CALayer class properties you can set - it will blow your mind - dynamic soft drop shadows on any view?)
Anyway, back on topic. To rotate your doors open in 3D, first position them as if they were closed, so with each door filling half the screen.
Now set their view.layer.anchorPoint properties as follows
leftDoorView.layer.anchorPoint = CGPoint(0, 0.5); // hinge around the left edge
rightDoorView.layer.anchorPoint = CGPoint(1.0, 0.5); // hinge around the right edge
Now apply the following animation
[UIView animateWithDuration:0.5 animations:^{
CATransform3D leftTransform = CATransform3DIdentity;
leftTransform.m34 = -1.0f/500; //dark magic to set the 3D perspective
leftTransform = CATransform3DRotate(leftTransform, M_PI_2, 0, 1, 0); //rotate 90 degrees about the Y axis
leftDoorView.layer.transform = leftTransform;
//do the same thing but mirrored for the right door, that probably just means using -M_PI_2 for the angle. If you don't know what PI is, Google "radians"
}];
And that should do it.
DISCLAIMER: I've not actually tested this, so the angles may be backwards, and the perspective may be screwy, etc. but it should be a good start at least.
UPDATE: Curiosity got the better of me. Here is fully working code (this assumes that the left and right doors are laid out in the closed position in the nib file):
- (void)viewDidLoad
{
[super viewDidLoad];
leftDoorView.layer.anchorPoint = CGPointMake(0, 0.5); // hinge around the left edge
leftDoorView.center = CGPointMake(0.0, self.view.bounds.size.height/2.0); //compensate for anchor offset
rightDoorView.layer.anchorPoint = CGPointMake(1.0, 0.5); // hinge around the right edge
rightDoorView.center = CGPointMake(self.view.bounds.size.width,self.view.bounds.size.height/2.0); //compensate for anchor offset
}
- (IBAction)open
{
CATransform3D transform = CATransform3DIdentity;
transform.m34 = -1.0f/500;
leftDoorView.layer.transform = transform;
rightDoorView.layer.transform = transform;
[UIView animateWithDuration:0.5 animations:^{
leftDoorView.layer.transform = CATransform3DRotate(transform, M_PI_2, 0, 1, 0);
rightDoorView.layer.transform = CATransform3DRotate(transform, -M_PI_2, 0, 1, 0);
}];
}
- (IBAction)close
{
[UIView animateWithDuration:0.5 animations:^{
CATransform3D transform = CATransform3DIdentity;
transform.m34 = -1.0f/500;
leftDoorView.layer.transform = transform;
rightDoorView.layer.transform = transform;
}];
}