I want to load a view from a certain place within my current view. Currently, my view consists of a calendar with day buttons, each representing a day within the month. One of the buttons is highlighted to represent the "today" button. I want to load my view from that position and grow that view from that small frame.
More specifically, I want to load yearCalendarView from the frame of a button inside curMonthView. Here is what I have currently:
// animate in year calendar
_yearCalendarView.hidden = NO;
self.curMonthView.monthLabel.hidden = YES;
CalendarMonthView *monthView = [CalendarMonthView new];
monthView.delegate = self;
CGRect buttonFrame = _currentDayButtonFrame;
_yearCalendarView.frame = buttonFrame;
_yearCalendarView.center = buttonFrame.origin;
_yearCalendarView.alpha = 0.0;
[UIView beginAnimations:#"animateYearCalendarIn" context:nil];
[UIView setAnimationDuration:0.5]; // kAnimation_AnimateInDuration];
[UIView setAnimationCurve:UIViewAnimationOptionCurveLinear];
_yearCalendarView.alpha = 1.0;
_yearCalendarView.frame = CGRectMake(_monthSwiperScrollView.frame.origin.x, _monthBarImageView.frame.size.height + 20, _monthSwiperScrollView.frame.size.width + 2, _yearFlyoutHeight);
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:#selector (yearCalendarAnimationDidStop:finished:context:)];
[_yearCalendarView setFrameHeight:_yearFlyoutHeight];
[UIView commitAnimations]; // start animation
_monthBarImageView.highlighted = YES;
[self _refreshMonthButton:NO];
I have the frame of the today button, but when I do this animation, it does not grow from that frame rather it just comes in from the bottom left corner of the new view _yearCalendarView.
How do I achieve this effect?
TLDR: Load a view from a known frame and then grow that frame to fit the screen.
Related
I have a UIView with a few subviews (and a few subviews in those). I am trying to minimize this entire view into the top left of the screen until it reaches a certain size (20 x 20) but am having trouble doing just that.
I first tried [UIView beginAnimations:nil context:nil]; but this didn't resize the subviews. Also, due to the padding and amount of other subviews, it would be very hard to set each subview frame to some new size and make it all work well.
I then tried this code:
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:2.0f];
[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
[self.myCardsCarousel.layer setAnchorPoint:CGPointMake(0.0f, 0.0f)];
[self.myCardsCarousel setTransform:CGAffineTransformMakeScale(0.0f, 0.0f)];
CGRect addCardsButtonFrame = self.addCardsButton.frame;
addCardsButtonFrame.size.height = 0.0f;
[self.addCardsButton setFrame:addCardsButtonFrame];
[UIView commitAnimations];
But this doesn't minimize to the top left of the screen. Instead, it minimizes to the dead center of the screen.
How can I anchor this to the top left of the screen? Also, how can I stop a CGAffineTransformMakeScale() when the view reaches a certain size?
One possible solution is to create a snapshot of the view, and animate the snapshot into the corner (assuming that it's ok for the minimized view to be static). The general sequence of events is
create a snapshot of the parent view into a memory bitmap
create a UIImageView from the snapshot
position the UIImageView in front of the parent view
hide the parent view using its hidden property
animate the UIImageView into the corner
To restore the view
animate the UIImageView back to its original location
unhide the parent view
remove the UIImageView and discard it
To start, you need a property for the UIImageView
#property (strong, nonatomic) UIImageView *snapshotView;
Here's the code to minimize the view
// create a snapshot image of the parent view
UIGraphicsBeginImageContextWithOptions( self.parentView.bounds.size, YES, 0 );
CGContextRef context = UIGraphicsGetCurrentContext();
[self.parentView.layer renderInContext:context];
UIImage *snapshot = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
// create a UIImageView from the snapshot
self.snapshotView = [[UIImageView alloc] initWithFrame:self.parentView.frame];
self.snapshotView.image = snapshot;
[self.view addSubview:self.snapshotView];
// hide the parent view in place, while animating the snapshot view into the corner
self.parentView.hidden = YES;
[UIView animateWithDuration:0.5 delay:0 options:UIViewAnimationOptionCurveEaseInOut
animations:^
{
self.snapshotView.frame = CGRectMake( 0, 0, 20, 20 );
}
completion:nil];
Here's the code to restore the view
[UIView animateWithDuration:0.5 delay:0 options:UIViewAnimationOptionCurveEaseInOut
animations:^
{
// animate the snapshot view back to original size
self.snapshotView.frame = self.parentView.frame;
}
completion:^(BOOL finished)
{
// reveal the parent view and discard the snapshot view
self.parentView.hidden = NO;
[self.snapshotView removeFromSuperview];
self.snapshotView = nil;
}];
When I rotate the iPad, all the animated components (e.g. views/buttons) will go back to their original position as to when it was first loaded. Is there any way to prevent this?
Here is how I animate object when I click an button e.g.
- (IBAction)button1Pressed:(id)sender{
[UIView animateWithDuration:ANIMATION_SPEED
delay:0.0
options:UIViewAnimationOptionBeginFromCurrentState
animations:(void (^)(void)) ^{
self.view.userInteractionEnabled = NO;
_button1.center = CGPointMake(73.01, 419.0);
_button2.center = CGPointMake(750.0, 419.0);
_button3.center = CGPointMake(850.0, 419.0);
_button4.center = CGPointMake(950.0, 419.0);
CGRect theFrame = _loginView.frame;
theFrame.size.width = 576.f;
_View1.frame = theFrame;
_View2.frame = CGRectMake(_button2.center.x + 44.0, _button2.center.y / 2 - 89.0, 0.0, 597.0);
_View3.frame = CGRectMake(_button3.center.x + 44.0, _button3.center.y / 2 - 89.0, 0.0, 597.0);
_4View.frame = CGRectMake(_button4.center.x + 44.0, _button4.center.y / 2 - 89.0, 0.0, 597.0);
}
completion:^(BOOL finished){
self.view.userInteractionEnabled = YES;
}];
}
I'm still quite new so all the details will be appreciated :)
I suggest you to create constraints for the interface you want to animate. Then add reference to your header file for those constraints as for any view element.
When you want to animate a view, you now have to update its constraints and ask to layout the views.
[UIView animateWithDuration:0.2
animations:^{
//in this case, I add 44 to my button Y position, so it will goes down 44px
buttonYConstraint.constant += 44;
[self.view layoutIfNeeded];
}
]
//Now don't forget to update constraints
[self.view updateConstraints];
Turning off auto layout located under the 'Interface builder document' fixed this in quick fashion :)
I have a UIView at the bottom left of its superview, i.e.its frame is like
[myView setFrame:CGRectMake(0,superView.bounds.size.height-myViewHeight,myViewWidth,myViewHeight)];
I want to animate its size such that its bottom left point remains fixed at its position. I am not sure how to play with anchor point property of layers.
Currently I am increasing its size using the following lines of code.
[UIView animateWithDuration:0.2 animations:^{
[bottomLbl setFrame:CGRectMake(0, bottomView.bounds.size.height-250, 300, 250)];
This works fine but when I try to bring back to its original size, its bottom point gets lifted at the start of animation and settles down at the end of animation.
First define the point for the bottom left corner...
CGPoint bottomLeft = CGPointMake(0, 480); // this can be anything.
Then you need to define the sizes (big and small).
CGSize bigSize = CGSizeMake(280, 280);
CGSize smallSize = CGSizeMake(50, 50); // again, these can be anything.
Then animate them...
// create the rect for the frame
CGRect bigFrame = CGRectMake(bottomLeft.x, bottomLeft.y - bigSize.height, bigSize.width, bigSize.height);
CGRect smallFrame = CGRectMake(bottomLeft.x, bottomLeft.y - smallSize.height, smallSize.width, smallSize.height);
[UIView animateWithDuration:0.2
animations:^{
// set the rect onto the view
bottomLbl.frame = bigFrame;
// or
bottomLbl.frame = smallFrame;
}];
As long as you set the frame and the calculated end frames are correct and it's all done in one animation then the bottom left corner won't move.
If this doesn't help can you please post a video of what is happening (and all your animation code).
EDIT
[UIView animateWithDuration:0.2
delay:0.0
options:UIViewAnimationOptionBeginFromCurrentState
animations:^{
// set the rect onto the view
bottomLbl.frame = bigFrame;
// or
bottomLbl.frame = smallFrame;
}
completion:nil];
I want to lengthen the right search bar 20 px to the left, and shorten left search bar 20 px to the right with animation. How can I do that?
CGRect leftFrame = self.leftSearchBar.frame;
//leftFrame.origin.x = leftFrame.origin.x - 20;
leftFrame.size.width = leftFrame.size.width - 40;
CGRect rightFrame = self.rightSearchBar.frame;
rightFrame.origin.x = rightFrame.origin.x - 40;
rightFrame.size.width = rightFrame.size.width + 40;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.5];
[UIView setAnimationDelay:0.0];
[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
self.leftSearchBar.frame = leftFrame;
self.rightSearchBar.frame = rightFrame;
[UIView commitAnimations];
It doesn't work. It first resizes views without animation, then moves the right view with animation.
Assuming you've not changed the anchor points, or anything like that, simply expanding the width will make it stretch to the right. Wrap this within a UIView animation block, and it should animate according to the specification within the question, as so:
UISearchBar* searchbar = ...; // However you've created your UISearchBar, we'll refer to it as 'searchbar'
CGRect searchFrame = searchbar.frame;
[UIView animateWithDuration:0.8
delay:0.0
options:UIViewAnimationOptionBeginFromCurrentState
animations:^{
searchFrame.size.width += 30;
searchbar.frame = searchFrame;
}
completion:nil];
You'll need to make sure the += 30 doesn't get called more than once, as otherwise you'll be expanding by 30 points each time this is called. If you know the size before hand, you could simply substitute it with = size + 30, which is a safer bet incase you call the animation more than once.
I have a UILabel called "nameLabel" and I have it inside an animation block so that this happens:
_nameLabel.alpha = 1;
CGAffineTransform translate = CGAffineTransformMakeTranslation(50, 50);
_nameLabel.transform = translate;
I thought that animates the UILabel to the spot I specify but it just animates from the above spot to the place where I have it in the Interface Builder. Any help here?
Can you post the animation block and other associated code? I am not sure what CGAffineTransformMakeTranslation does with the label, but if you want to animate the frame location, you can use this:
CGRect frame = _nameLabel.frame;
frame.origin.y = 100; //Desired height, origin.x can be modified as well.
//You can also change the frame size here but it wont work on UILabels, you will need `CGAffineTransformScale` for that.
[UIView animateWithDuration: 1.5
delay:0.0
options:UIViewAnimationCurveEaseInOut | UIViewAnimationOptionBeginFromCurrentState
animations:^ {
[_nameLabel setFrame:frame];
}
completion:^ (BOOL finished) {
}];
Edit: The other way:
CGRect frame = _nameLabel.frame;
frame.origin.y = 100;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:0.5];
[_nameLabel setFrame: newFrame];
[UIView commitAnimations];
Current state is probably the current location of the label, try that first but if nothing happens, remove UIViewAnimationOptionBeginFromCurrentState or set the frame of the label to another location before the animation, and move it to its initial (the one in the xib file) position in the animation block, its your call.
Watch out because Autolayout cause a lot of problems.
Try to deselect 'Use Autolayout'
It solves to me all the problems trying to translate objects.