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.
Related
Add bouncing animation while changing UIVIew frame. I only know how to change frame but I don't know how to set bouncing effect while changing view frame. Below is my code....
[UIView animateWithDuration:0.3 delay:0.0 options:UIViewAnimationOptionBeginFromCurrentState animations:^{
CGRect frame = viewContent.frame;
frame.size.height = CGRectGetHeight(viewContentFullDetail);
viewContent.frame = frame;
} completion:^(BOOL finished) { }];
You can check animated gif image on below link. I want to add animation not same like this but near to this. Main animation are unfolding and bouncing effect.
https://drive.google.com/open?id=0B9k_Shyb5v62eFdxWXhYeXV3a0E
Please help. I don't know how to do this.
You need to try this
int duration, damping, velocity;
[UIView animateWithDuration:duration delay:0
usingSpringWithDamping:damping initialSpringVelocity:velocity
options:0 animations:^{
// your animation code here
} completion:nil];
Play with the damping and velocity values to know more about this feature in the animation code.
here is the link for a tutorial
I want to do a bar-graph animation. Where the bars go up when the view loads. Here is what I do.
CGRect bar1Frame = self.rootView6.bar1.frame;
bar1Frame.size.height = 181;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.5];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
self.rootView6.bar1.frame = bar1Frame;
[UIView commitAnimations];
The problem is that the bars height goes to the bottom of the view instead of going to the top.
Anyone can help me?
You need to update the y origin of the bar1Frame as well with
bar1Frame.origin.y = bar1Frame.origin.y - 181;
bar1Frame.size.height = 181;
and apply the animations as you did. Doing so will show your bar above the horizontal line of the graph.
You need to change the y-position of the UIView.
Eg: if you need to change height to 100 then
bar1Frame.origin.y = bar1Frame.origin.y-100;
CGRect bar1Frame = self.rootView6.bar1.frame;
bar1Frame.size.height = 181;
bar1.Frame.origin.y -= bar1Frame.size.height;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.5];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
self.rootView6.bar1.frame = bar1Frame;
[UIView commitAnimations];
There is a button that horizontally shifts my table.
- (void)togglePreferencePageVisibility:(id)sender {
int translation = [self preferencesVisible] ? -PREFERENCE_TRANSLATION_HEIGHT : PREFERENCE_TRANSLATION_HEIGHT;
//animate tableview down
[UIView animateWithDuration:0.3
delay:0
options: UIViewAnimationCurveEaseOut
animations:^{
_table.center = CGPointMake(_table.center.x, _table.center.y+translation);
}
completion:^(BOOL finished){
}];
}
When I call [_table reloadData], the table reverts to its original position. I tried manually readjusting the table position, like so
NSLog(#"before %#", NSStringFromCGRect(_table.frame));
[_table reloadData];
_table.frame = CGRectMake(initialTablePosition.x, initialTablePosition.y+PREFERENCE_TRANSLATION_HEIGHT, _table.frame.size.width, _table.frame.size.height);
NSLog(#"after %#", NSStringFromCGRect(_table.frame));
but no luck. Also the frame's have the same y position before and after.
You need to also adjust the auto layout constraints using the NSLayoutConstraint class. You can add, remove or change the values of NSLayoutConstraints. This is a VERY common question on stack overflow right now, due to the change from iOS 7 to iOS 8.
If you do not adjust the layout constraints then the view will be repositioned back to its original location. reloadData redraws the UITableView which causes the view hierarchy to reexamine its positions e.t.c.
As an example of making a view with a width constraint narrower:
CGRect frame = myView.frame;
frame.size.width -= 100;
//Next line now needed in iOS 8
myWidthConstraint.constant -= 100;
[UIView animateWithDuration:0.5 animations:^{
[myView setFrame:frame];
}];
EDIT: moving back example:
CGRect frame = myView.frame;
frame.size.width += 100;
//Next line now needed in iOS 8
myWidthConstraint.constant += 100;
[UIView animateWithDuration:0.5 animations:^{
[myView setFrame:frame];
}];
When using auto layout, you should not set any frames. If you do, when the view needs to redraw itself, the frame will be reset to the frame defined by its constraints. You should add an IBOutlet to a constraint between your table view and the top (or bottom what ever works for your use) of its superview (I'll call it topCon in the example below).
- (void)togglePreferencePageVisibility:(id)sender {
int translation = [self preferencesVisible] ? -PREFERENCE_TRANSLATION_HEIGHT : PREFERENCE_TRANSLATION_HEIGHT;
//animate tableview down
self.topCon.constant += translation; // this might need to be "-=" depending on whether your constraint is to the top or bottom
[UIView animateWithDuration:0.3
delay:0
options: UIViewAnimationCurveEaseOut
animations:^{
[self.view layoutIfNeeded];
}
completion:^(BOOL finished){
}];
}
I'm not sure whether I can describe it properly. It's a kind of UIView, and we see only it's part (with arrow,maybe. on the bottom of screen,maybe). User can click on it, and this view appears fullscreen(usually developer leaves there some additional information). How can I make it?
Try this:
-(void)show
{
[viewObj setFrame:CGRectMake(viewObj.frame.origin.x,viewObj.frame.origin.y,viewObj.frame.size.width, viewObj.frame.size.height)];//Here "viewObj.frame.origin.y" means 568
[UIView animateWithDuration:0.5 animations:^
{
[viewObj setFrame:CGRectMake(viewObj.frame.origin.x,0,viewObj.frame.size.width, viewObj.frame.size.height)];
}
completion:^(BOOL finished)
{
}];
}
-(void)hide
{
[viewObj setFrame:CGRectMake(viewObj.frame.origin.x,viewObj.frame.origin.y,viewObj.frame.size.width, viewObj.frame.size.height)];//Here "viewObj.frame.origin.y" means 0
[UIView animateWithDuration:0.5 animations:^
{
[viewObj setFrame:CGRectMake(viewObj.frame.origin.x,568,viewObj.frame.size.width, viewObj.frame.size.height)];
}
completion:^(BOOL finished)
{
}];
}
i just put the logic that just setting of view Y coordinate of That View and when user click on Button. that et animation and at the re setting the view frame with Y coordinate setting like:
yourview.frame = CGRectMake(0,280,320,568);
[UIView animateWithDuration:2
delay:0.1
options: UIViewAnimationOptionTransitionFlipFromBottom
animations:^{
yourview.frame = CGRectMake(0, 0, 320, 568);
}
completion:^(BOOL finished){
}];
Also see this example:
https://github.com/crocodella/PullableView
Here above github demo this same that you are looking for its output like:
Look at UIView reference:
https://developer.apple.com/library/ios/documentation/uikit/reference/uiview_class/uiview/uiview.html
Specifically:
#property(nonatomic) CGPoint center
And
+ (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations
Example:
[UIView animateWithDuration:2.0 animations:^{
myView.center = CGPointMake(self.view.center.x, self.view.center.y + myOffset);
}];
Duration is in seconds. In this case, 2 seconds.
If you're using AutoLayout, you probably want to change the layout constant, rather then center property.
About Layout Constrains:
https://developer.apple.com/library/ios/documentation/AppKit/Reference/NSLayoutConstraint_Class/NSLayoutConstraint/NSLayoutConstraint.html
Look at constant property. You can also drag a constrain outlet from Interface Builder and access its constant. It's really simple once you get to know it a bit.
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.