I'm trying to translate a UIView for a distance using the following code:
CGAffineTransform transform = CGAffineTransformMakeTranslation(-100, -100);
[self.exposureHintView setTransform:transform];
[UIView animateWithDuration:2.0
delay:0.0
options:UIViewAnimationOptionBeginFromCurrentState
animations:^{
NSLog(#"Begin!");
CGAffineTransform newTrans = CGAffineTransformMakeTranslation(0, 0);
[self.exposureHintView setTransform:newTrans];
}
completion:^(BOOL finished) {
NSLog(#"End %d", finished);
}];
So basically, I'm justing trying to move the view from some point say (-100, -100) to where it should be (0, 0) relative to itself.
Since I wanted to animate it once the view appeared, so I put the code in viewDidAppear:. But when I run the code, nothing happened.
The self.exposureHintView here is a custom subclass of UIView, does it matter?
Why?
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.5];
[_AboutView setFrame:CGRectMake(0, 0, 320, 510)];
[UIView commitAnimations];
Use this code to change the position of your view
I think the problem here is you are create exposureHintView in storyboard or XIB file without code programmatically.
Try to do as the follows:
- (void)viewDidLoad
{
//Init exposureHintView
UIView* exposureHintView = [[UIView alloc]initWithFrame(sampleFrame)];
[self addSubView: exposureHintView];
//Set transform
CGAffineTransform transform = CGAffineTransformMakeTranslation(-100, -100);
[self.exposureHintView setTransform:transform];
//Commit animation
[UIView animateWithDuration:2.0 delay:0.0
options:UIViewAnimationOptionBeginFromCurrentState
animations:^{
NSLog(#"Begin!");
CGAffineTransform newTrans = CGAffineTransformMakeTranslation(0, 0);
[self.exposureHintView setTransform:newTrans];
}
completion:^(BOOL finished) {
NSLog(#"End %d", finished);
}];
The reason here is your could not set Frame or Transform or some another attribute of this UIView in >>ViewDidLoad when you using storyboard or XIB
Related
The code below came from this SO question: UIView shake animation.
This shake animation is perfect, except it stops after one iteration. How do you repeat the animation indefinitely, or how do you cause it to repeat it X times?
There are other SO answers on repeating UIView animations that suggest using CAKeyframeAnimation or CABasicAnimation, but this question is different. The goal is to reproduce this exact animation, with the "springy" effect from usingSpringWithDamping and initialSpringVelocity.
Using Autoreverse and Repeat don't reproduce the desired effect because the the initial translation is outside the animation block.
view.transform = CGAffineTransformMakeTranslation(20, 0);
[UIView animateWithDuration:0.4 delay:0.0 usingSpringWithDamping:0.2 initialSpringVelocity:1.0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
view.transform = CGAffineTransformIdentity;
} completion:nil];
If you need exact same code few times than put that code in method and do recursion, something like that:
- (void)animateCount:(NSInteger)count {
if (count == 0) {
return;
}
view.transform = CGAffineTransformMakeTranslation(20, 0);
[UIView animateWithDuration:0.4 delay:0.0 usingSpringWithDamping:0.2 initialSpringVelocity:1.0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
view.transform = CGAffineTransformIdentity;
} completion:^{
count--;
[self animateCount:count];
}];
}
Use (UIViewAnimationOptionAutoreverse | UIViewAnimationOptionRepeat) in options to repeat it indefinitely
[UIView animateWithDuration:0.4 delay:0.0 usingSpringWithDamping:0.2 initialSpringVelocity:1.0 options:(UIViewAnimationOptionAutoreverse | UIViewAnimationOptionRepeat | UIViewAnimationOptionCurveEaseInOut) animations:^{
someView.frame = someFrame1;
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.5f animations:^{
someView.frame = someFrame2;
} completion:nil];
}];
Here's the code I'm using to take a UIImageView and make it float up and down.
[UIView animateKeyframesWithDuration:2.0 delay:0.0 options:UIViewKeyframeAnimationOptionRepeat animations:^{
[UIView addKeyframeWithRelativeStartTime:0.0 relativeDuration:0.25 animations:^{
self.slider.transform = CGAffineTransformMakeTranslation(0, -5.0);
}];
[UIView addKeyframeWithRelativeStartTime:0.25 relativeDuration:0.5 animations:^{
self.slider.transform = CGAffineTransformMakeTranslation(0, 5.0);
}];
[UIView addKeyframeWithRelativeStartTime:0.75 relativeDuration:0.25 animations:^{
self.slider.transform = CGAffineTransformMakeTranslation(0, 0.0);
}];
} completion:^(BOOL finished) {
}];
However, it comes out looking like this with this delay after the animation ends and before it restarts.
How do I make it fluid?
I'm not sure what effect you're going for exactly, but I think this gives you something like your code does without the delay. I usually do this by animating a constraint, rather than using transforms. In this example, I've made an IBOutlet (topCon) to the constraint to the top of the view:
-(IBAction)floatView:(id)sender {
static int i= 1;
static float duration = .25;
[UIView animateWithDuration:duration delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
self.topCon.constant = self.topCon.constant - (5 * i);
[self.view layoutIfNeeded];
} completion:^(BOOL finished) {
i = (i == 1 || i == 2)? -2 : 2;
duration = 0.5;
[self floatView:self];
}];
}
I currently have an image animating on the click of a button, but the problem is that the image is jumping from it's position on the storyboard before it starts the animation. I cannot figure out why it's doing this - all I would like to do it move it from its current position off the screen to the right.
Am I doing something wrong, or just missing something?
Original position:
Beginning of animation:
moveImage trigger:
[self moveImage:_cornerCloud duration:3.0
curve:UIViewAnimationOptionCurveLinear x:200.0 y:0];
moveImage function:
- (void)moveImage:(UIImageView *)image duration:(NSTimeInterval)duration
curve:(int)curve x:(CGFloat)x y:(CGFloat)y
{
// Setup the animation
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:duration];
[UIView setAnimationCurve:curve];
[UIView setAnimationBeginsFromCurrentState:YES];
// The transform matrix
CGAffineTransform transform = CGAffineTransformMakeTranslation(x, y);
image.transform = transform;
// Commit the changes
[UIView commitAnimations];
}
[UIView animateWithDuration:3.0f
delay:0.0f
options:UIViewAnimationOptionCurveLinear
animations:^{
// just set the center to off-screen
}
completion:^(BOOL finished){}];
That should be a bit easier.
I want to make a little zoom/fade animation for when the UIImageView shows up in my view, I already have the code for the fade effect:
banner.alpha = 0.0;
[UIView animateWithDuration:2.0 animations:^{
banner.alpha = 1.0;
}];
Now I want to know if there is another easy way to combine the fade effect with a little zoom effect, like the image becoming larger and filling up the frame as it fades in? Any ideas?
Thanks!
you can use CG_EXTERN CGAffineTransform CGAffineTransformMakeScale(CGFloat sx, CGFloat sy) to do the zoom effect
such as
banner.alpha = 0.0;
[UIView animateWithDuration:2.0 animations:^{
banner.alpha = 1.0;
banner.transform =CGAffineTransformMakeScale(1.3,1.3);
}];
You can also use the frame
banner.alpha = 0;
[UIView animateWithDuration:2.0f animations:^(void){
banner.alpha = 1.0f;
[banner setFrame:CGRectMake(0, 0, 1024, 748)];
}];
// With Completion
[UIView animateWithDuration:0.1f animations:^(void){
banner.alpha = 1.0f;
[banner setFrame:CGRectMake(0, 0, 1024, 748)];
}completion:^(BOOL finished) {
}];
I have 2 views. I would like a card to flip and rotate along its axis to show the other view.
So when I click on view1, view1 should flip but flip in the sense that it rotates around the y-axis to show view 2.
I am using the FLIP directive in IOS, but that does not do the "rotate" that I am looking for:
[UIView transitionFromView:(self.displayingPrimary ? self.primaryView : self.secondaryView)
toView:(self.displayingPrimary ? self.secondaryView : self.primaryView)
duration: 2.0
options: (self.displayingPrimary ? UIViewAnimationOptionTransitionFlipFromLeft :
UIViewAnimationOptionTransitionFlipFromRight) | UIViewAnimationOptionShowHideTransitionViews
completion:^(BOOL finished) {
if (finished) {
self.displayingPrimary = !self.displayingPrimary;
}
}];
There are a couple of ways you can make one view flip to another using Quartz on iOS if you do not like the built in flip transformation. The following two code snippets both require you to #import <QuartzCore/QuartzCore.h> and also link against the QuartzCore framework. Note that both functions I wrote assume that both views are added as subviews with the same frame and one of them is hidden (setHidden:).
The first function will flip one view to another using 2D transformations. This is more efficient and all it really does is scale along the x axis. At high speeds, it looks pretty good, IMO.
+ (void)flipFromView1:(UIView*)v1 toView:(UIView*)v2 duration:(NSTimeInterval)duration completion:(void (^)(BOOL finished))completion
{
duration = duration/2;
[v2.layer setAffineTransform:CGAffineTransformMakeScale(0, 1)];
[UIView animateWithDuration:duration delay:0 options:UIViewAnimationOptionCurveEaseIn animations:^{
[v1.layer setAffineTransform:CGAffineTransformMakeScale(0, 1)];
} completion:^(BOOL finished){
[v1 setHidden:YES];
[v2 setHidden:NO];
}];
[UIView animateWithDuration:duration delay:duration options:UIViewAnimationOptionCurveEaseOut animations:^{
[v2.layer setAffineTransform:CGAffineTransformMakeScale(1, 1)];
} completion:completion];
}
The second function performs an actual 3D transformation. Note that if the views being rotated using this 3D transformation are over or under other subviews in 3D space then you could see those other views sticking through or getting hidden during this animation.
+ (void)flipFromView2:(UIView*)v1 toView:(UIView*)v2 duration:(NSTimeInterval)duration rToL:(BOOL)rToL completion:(void (^)(BOOL finished))completion
{
duration = duration/2;
v2.layer.transform = CATransform3DMakeRotation((rToL ? -1.57079633 : 1.57079633), 0, 1, 0);
[UIView animateWithDuration:duration delay:0 options:UIViewAnimationOptionCurveEaseIn animations:^{
v1.layer.transform = CATransform3DMakeRotation((rToL ? 1.57079633 : -1.57079633), 0, 1, 0);
} completion:^(BOOL finished){
[v1 setHidden:YES];
[v2 setHidden:NO];
}];
[UIView animateWithDuration:duration delay:duration options:UIViewAnimationOptionCurveEaseOut animations:^{
v2.layer.transform = CATransform3DMakeRotation(0, 0, 1, 0);
} completion:completion];
}