I have a view I change the background of as the state of the application changes. Basically I want the view background changes to animate in some sort of a slide. I've been looking for a solution, but haven't really found anything.
So I want to have a transition from whatever the current background is to the next one.
//current to:
self.view.backgroundColor = [UIColor colorWithPatternImage:image];
I have no trouble getting the background to change but I would like to animate it. Any help in the right direction would be greatly appreciated thanks.
You can use this:
[UIView animateWithDuration:1
delay:0
options:UIViewAnimationOptionAutoreverse
animations:^
{
self.view.backgroundColor = [UIColor colorWithPatternImage:image];
}
completion:nil
];
a very easy way to handle it:
such as yourView.backgroundColor = [UIColor redColor];
Then use this to animate change the color
#import <QuartzCore/QuartzCore.h>
yourView.backgroundColor = [UIColor blueColor];
CATransition *transiton = [[CATransition alloc] init];
transiton.duration = .5;
[yourView.layer addAnimation:transiton forKey:#"Animation"];
Just a simple animation block:
[UIView animateWithDuration:time animations^{
self.view.backgroundColor = [UIColorWithPatternImage:image];
}];
this just animates the transfer, taking time seconds.
Related
I have a custom view (which draws callouts/bubbles) that I currently add as a subview to a UIImageView. It works as intended but I would like to animate the operation with a spring-like effect. I am using the below code but it does not work (the block gets executed but without animation):
/* ViewController */
UIImageView *iv = self.imageView;
ZGCBubbleView *bubbleView = [[ZGCBubbleView alloc] init];
bubbleView.hidden = YES;
[iv addSubview:bubbleView];
// UIView animation test
[UIView animateWithDuration:2.0
delay:0
usingSpringWithDamping:0.5
initialSpringVelocity:0.5
options:UIViewAnimationOptionAllowAnimatedContent & UIViewAnimationOptionLayoutSubviews
animations:^{
bubbleView.hidden = NO;
[self.view layoutIfNeeded]; // tried this
}
completion:nil];
I have tried to animate both the hidden property as well as the alpha properties but same result. I have also tried animating the addSubview method, no difference. I started out with a more simple animation as proof of concept but that didn't work either.
The above code is executed within a method which is called during the (void)viewDidAppear:(BOOL)animated cycle. Does this have anything to do with this in that the animation is being executed during the main thread? I have read something to that effect but unsure. Also, I am using auto layout for the UIImageView but didn't think that would matter in this case since the animation is being applied to a custom subview of the UIImageView.
Any help appreciated.
Better use alpha.
UIImageView *iv = self.imageView;
ZGCBubbleView *bubbleView = [[ZGCBubbleView alloc] init];
bubbleView.alpha = 0;
// bubbleView.hidden = YES;
[iv addSubview:bubbleView];
// UIView animation test
[UIView animateWithDuration:2.0
delay:0
usingSpringWithDamping:0.5
initialSpringVelocity:0.5
options:UIViewAnimationOptionAllowAnimatedContent & UIViewAnimationOptionLayoutSubviews
animations:^{
// bubbleView.hidden = NO;
bubbleView.alpha = 1;
//[self.view layoutIfNeeded]; // tried this
}
completion:nil];
Try with this.
UIButton *catchButton = (UIButton *)sender;
[UIView animateWithDuration:1.0
delay:0.0
options:UIViewAnimationOptionCurveEaseInOut//UIViewAnimationOptionAutoreverse | UIViewAnimationOptionRepeat |
animations:^{
catchButton.alpha = 0.4;
catchButton.enabled = NO;
}
completion:NULL];
I encountered the problem, can't find a good solution so far.
After some certain actions I want to change the background color of my self.view with animation. So I do something like this:
[UIView animateWithDuration:5.0 delay:0.0 options:UIViewAnimationOptionCurveEaseOut animations:^{
self.view.backgroundColor = [UIColor orangeColor];
} completion:^(BOOL finished) {
self.backgroundColor = self.view.backgroundColor;
}];
And I want this animation to be slow and easy, that's why it can be likfe 3-5 seconds, not just a quick switch form one to another.
The problem is that if I make it on the Main thread it makes my app completely unresponsive for these 3-5 seconds while the animation is performing. If I make it on the background thread I have a lot of problem, which is expected.
Is there any good solution how to slowly update background color with animation without freezing the screen?
Thanks!
You need to use UIViewAnimationOptionAllowUserInteraction option instead of UIViewAnimationOptionCurveEaseOut to allow user interaction.
[UIView animateWithDuration:5.0 delay:0.0 options:UIViewAnimationOptionAllowUserInteraction animations:^{
self.view.backgroundColor = [UIColor orangeColor];
} completion:^(BOOL finished) {
self.backgroundColor = self.view.backgroundColor;
}];
I am trying to give the flip effect to a UIview as if on one side I had some content and on the other side I had some other in the following way:
[UIView transitionWithView:FlipView duration:0.7
options:UIViewAnimationOptionTransitionFlipFromRight animations:^{
//imageView.image = secondImage;
FlipImage.hidden = YES;
for (UIButton *btn in arrayoflabels) {
btn.hidden = YES;
}
containerViewSplashit.hidden = NO;
containerViewSplashit.alpha = 1.0;
closeButton.hidden = NO;
} completion:nil];
The only problem is that it flips and then when it finishes flipping, it shows the hidden content I want to show, but it doesn't give that front to back effect that it swops side when it passes the middle. how can i fix this?
You should try to ad the UIViewAnimationOptionAllowAnimatedContent option to the animation option because you have animatable changes in your block (hidden, alpha).
I wrote a custom UITableViewCell - image view, button and three labels now I am trying to add some animations to it. So once I tap the button, it fades away and the spinner replaces the button. After two seconds the cell is overlaid with a red color, as a subview of cell fades in, then the indicator is removed and and red overlay starts fading back out. As well the button I previously removed fades back in.
(I could not phrase it a better way :P )
The method is :
-(void)rentButtonPressed:(id)sender
{
UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
[indicator startAnimating];
indicator.center = self.rentButton.center;
[UIView animateWithDuration:0.2
animations:^{self.rentButton.alpha = 0.0;}
completion:^(BOOL finished){
[self.rentButton removeFromSuperview];
[self addSubview:indicator];
}
];
UIView *overlay = [[UIView alloc] initWithFrame:self.backgroundImage.frame];
overlay.alpha = 0.0;
overlay.backgroundColor = [UIColor redColor];
[self.contentView addSubview:overlay];
[UIView animateWithDuration:0.4
delay:2.0
options:UIViewAnimationCurveEaseInOut
animations:^{
[indicator removeFromSuperview];
overlay.alpha = 0.4;
}
completion:^(BOOL finished){
[UIView animateWithDuration:0.4
animations:^{ overlay.alpha = 0.0; }
completion:^(BOOL finished)
{
[overlay removeFromSuperview];
}
];
[self.contentView addSubview:self.rentButton];
[UIView animateWithDuration:0.4 animations:^{ self.rentButton.alpha = 1.0;}];
[self.delegate didTryToRentMovieAtCell:self];
}
];
}
So the code does fade out the button, replace it with spinner and fades in the red overlay. The problem is, the red overlay does not fade away, but disappears same with the button, instead of fading in, it just appears.
During your animation, you are changing the view hierarchy by adding and removing subviews. The UIView class method animateWithDuration:animations:completion is intended only animating property changes in a view, and not for changing the view hierarchy.
Try using the UIView class method transitionWithView:duration:options:animations:completion: instead, and use the cell's content view as the "container."
This documentation is helpful in distinguishing between animating view property changes and animating view transitions, specifically the section "Changing the Subviews of a View":
http://developer.apple.com/library/ios/#documentation/windowsviews/conceptual/viewpg_iphoneos/animatingviews/animatingviews.html
I have a label that gets updated with values calculated from information received by the server. Depending on how much traffic there is the updates can come in rapidly or at random intervals. What I would like to do is compare the new calculated value with the old value and if it has increased then change the text to be green and the background to be a darker green and if the value has decreased then change the text to a shade of red and dark red.
That part is easy to do, what I am having some trouble is after a half a second or so I would like to change the background and text to be their default colors. I'm doing this as part of user feedback for when the values change.
Any information would be greatly appreciated.
A label is a subclass of UIView. Assuming you have some method that notifies you of when the change occurs...
- (void)someMethodThatNotifiesOfChange {
// Calculate new values and assume the result means color button green
[UIView animateWithDuration:0.5 animations:^{
label.backgroundColor = [UIColor greenColor];
} completion:^(BOOL finished) {
if (finished) {
[UIView animateWithDuration:0.5 delay:5.0 options:nil animations:^{
label.backgroundColor = [UIColor clearColor];
} completion:nil];
}];
}
This just changes the background to be green, but illustrates the point none-the-less. This take 0.5 seconds to animate to green. Then, when it is complete, it waits 5 seconds and then takes 0.5 to animate back to clear.
You can use CoreAnimation library if you want advanced animation but if you just animate UILabel properties, you can use UIView static method to do this. You can do it like this:
[UIView animateWithDuration:0.3f animations:^{
label.textColor = [UIColor greenColor];
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.3f animations:^{
label.textColor = [UIColor blackColor];
} completion:nil];
}];
In first animation block, you set label's text color (and background color if you want). In its completion block you set the label's color back using another animation.
Hope it helps.
Take a look at NSTimer. Timers are useful to lots of situations!
Good luck!
Alternatively by IOS 4 the followwing block would do the same effect
[UIView transitionWithView: infoLabelInternet duration:0.3 options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
infoLabelPremium.textColor = kPopoverActiveTextColor;
} completion:nil];
You can also do it this way:
label.backgroundColor = [UIColor greenColor];
[label performSelector:#selector(setBackgroundColor:) withObject:[UIColor clearColor] afterDelay:0.5];