Hi I have piece of code which only one line is not working...
[UIView animateWithDuration:0.3 delay:0.0 options:UIViewAnimationOptionCurveEaseOut animations:^{
[label setFrame:CGRectMake(0, 0, frame.size.width, kStandardLabelHeight)]; //working
[self.currentLabel setFrame:CGRectOffset(self.currentLabel.frame, frame.size.width, 0)]; //not working
[self.currentLabel setAlpha:0.0f]; //working
} completion:^(BOOL finished) {
[self.currentLabel removeFromSuperview];
self.currentLabel = label;
}];
I'm running out of ideas what is wrong...
What I find out is: if I turn off "Use Auto Layout", then it magically working, so this issue is connected with auto layout.
After a search, I find this: http://weblog.invasivecode.com/post/42362079291/auto-layout-and-core-animation-auto-layout-was
Add constraint outlet mapping for your view, then instead of using setFrame, updating constraints will do the trick!
Below is my final implementation (_topConstraint is the top vertical space constraint of table view):
- (IBAction)switchButtonTouched:(id)sender
{
if (_topConstraint.constant <= 0)
_topConstraint.constant = _buttonView.frame.size.height;
else
_topConstraint.constant = 0;
[_tableView setNeedsUpdateConstraints];
[UIView animateWithDuration:0.5f animations:^(void){
[_tableView layoutIfNeeded];
} completion:^(BOOL finished){
}];
}
Frame must be a CGRect with 4 parameters: (xPosition,yPosition,width,height). Use CGRectMake for set frame
self.currentLabel.frame = CGRectMake(100, 100, self.currentLabel.frame.size.width, self.currentLabel.frame.size.height)
You set 0.3 sec the animation duration, and when it s end you remove it from the view. This is too short. set the duration for example 2, and you will see that your label is moving .
Sometimes you should set frames for animating views also after animation, for example in completion block, try something like that
[UIView animateWithDuration:0.3 delay:0.0 options:UIViewAnimationOptionCurveEaseOut animations:^{
[label setFrame:CGRectMake(0, 0, frame.size.width, kStandardLabelHeight)]; //working
[self.currentLabel setFrame:CGRectOffset(self.currentLabel.frame, frame.size.width, 0)]; //not working
[self.currentLabel setAlpha:0.0f]; //working
} completion:^(BOOL finished) {
self.frame = currentLabelFrame;
label.frame = label.frame;
[self.currentLabel removeFromSuperview];
self.currentLabel = label;
}];
If your issue is neither Autolayout related, or the others listed here, there is also another possible problem that turned out to be my issue. I'm simultaneously running a UIView transition (transitionFromView:toView:) on views that take up the same screen space (Different superviews, not related, other than positioning in the superview of the overarching view controller).
My code looked like this:
[UIView transitionFromView:self.someView
toView:self.someOtherView
duration:0.6f
options:UIViewAnimationOptionTransitionCrossDissolve | UIViewAnimationOptionShowHideTransitionViews
completion:NULL];
[UIView animateWithDuration:0.3
delay:0.0 options:UIViewAnimationOptionCurveEaseOut
animations:^{
[self.someThirdView setFrame:someFrame]; //not working
[self.someThirdView setAlpha:1.0f]; //working
} completion:nil];
The frame changed, but it popped to the new frame rather than animating. I'm guessing this is an internal iOS issue. As soon as I removed the "transitionFromView:..." call, the frame animation worked fine.
My solution for now has been to move the second animation into the completion block of the transitionFromView. It's not perfect, as the two animations should have lined up, but it is a passable solution for now.
Related
I'm trying to run an example to test this function. I have a label an a button in the storyBoard and I have referenced the bottom constraint of the label in the view controller. When I use the button I want the label to move with an animation but it moves without it. Here's the code of the button:
- (IBAction)sd:(id)sender {
[UIView animateWithDuration:0.5f animations:^{
self.constraint.constant += 50;
}];
}
I know how to use it in swift but I'm having problems in objective c and I know it will be just for a little mistake... Any help?
This is not the right way of animating a UI component constrained with Autolayout. You should first update the constraint, then call layoutIfNeeded within the animation block:
self.constraint.constant += 50;
[UIView animateWithDuration:0.5f animations:^{
[self.view layoutIfNeeded];
}];
Use this
self.constraint.constant += 50;
[UIView animateWithDuration:0.5f
animations:^{
[self.view layoutIfNeeded];
}];
Try this setNeedsLayout helps in some cases.
self.constraint.constant += 50;
[UIView animateWithDuration:0.5f
animations:^{
[self.view setNeedsLayout];
}
completion:^(BOOL finished) {
}];
I have an app in which I use a lot of animations with ease in/out curves. I use this function in all cases: UIView animateWithDuration:delay:options:animations:completion
All these animations are working ok, but now I am trying to add one to a drawer that pops in and out, and for some reason this particular animation is always linear:
[UIView animateWithDuration:2 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
self.activityBar.view.frame = CGRectMake(0, self.activityBar.view.frame.origin.y, self.activityBar.view.frame.size.width, 20);
} completion:nil];
Why is this animation linear, while other animations with the same option are curved?
This is the view hierarchy for self.activityBar.view
-UIViewController
-UIViewController
-UIViewController (animation code lives here)
-UIViewController (activityBar)
-UIView (activityBar.view)
//Set old Frame for activityBar Here
[UIView animateWithDuration:2.0 delay:0.0 options:UIViewAnimationOptionCurveEaseOut animations:^{
[self.view layoutIfNeeded];
//Update to the new frame
self.activityBar.view.frame = CGRectMake(0, self.activityBar.view.frame.origin.y, self.activityBar.view.frame.size.width, 20);
} completion:^(BOOL finished) {
}];
I have a button and in the button action I want to show my UITableView by sliding from the button and after the cell click it should goest up by sliding effect.I did it by UIViewAnimation by setting the fixed y position and changing the height from 0 to the height
tableview.hidden=FALSE;
tableview.frame = CGRectMake(0,myButton.frame.size.height,myButton.frame.size.width, 0);
[UIView animateWithDuration:AnimationTime animations:^{
tableview.frame = CGRectMake(tableview.frame.origin.x, tableview.frame.origin.x, tableview.frame.size.width, 200 );
} completion:^(BOOL finished) {
}];
But this is not .I wanted a sliding effect.Any help will be appreciable
Use this method for animation. Provide a option for animation style. There a lot of option in objective-c for animation style
[UIView animateWithDuration:15.0f delay:0.0f options:UIViewAnimationOptions animations:^{
tableview.frame = CGRectMake(tableview.frame.origin.x, tableview.frame.origin.x, tableview.frame.size.width, 200 );
} completion:^(BOOL finished)
{
}];
for your case i thought you should use UIViewAnimationOptionTransitionFlipFromTop as animation options for slide table from top to bottom.By using this your table view get its full height in 15 sec. you can mange that too.
EDIT:
Once you clicked on cell, you want that your tableview goes up with slide effect. Than use
[UIView animateWithDuration:2.0f delay:0.0f options:UIViewAnimationOptionTransitionFlipFromBottom animations:^{
tableview.frame = CGRectMake(tableview.frame.origin.x, tableview.frame.origin.x, tableview.frame.size.width, 0 );
} completion:^(BOOL finished)
{
}];
for slide up animation.
Problem is not animation, problem is the frame you are defining. Easiest way to do this, is to define open and close frame and use them to animate.. See below..
Define Open and Close frame
-(void)initComponents{
CGRect rect=tableView.frame;
rect.origin=myButton.center;
openFrame=rect;//Assign openFrame before changing the size.
rect.size=CGSizeZero;
tableView.frame=rect;
closeFrame=rect;//Assign closeFrame
}
Call the initComponents function in viewDidLoad to set the initial state of your tableview. Now simply use the functions below on actions where you want to call.
-(void)openMenu{
[UIView animateWithDuration:.3 animations:^{
tableView.frame=openFrame;
}];
}
-(void)closeMenu{
[UIView animateWithDuration:.3 animations:^{
tableView.frame=closeFrame;
}];
}
Thats it. It should work.
Let me know. Cheers.
Im creating a custom view, it contains methods like Refresh,*LayoutSubviews*, following this tutorial
I want a label to be animated growing, to it's full width and then back to 0 width. Im using this code in "refresh" method:
[UIView animateWithDuration:1.3 animations:^{
CGRect frame = CGRectMake(50, 15, 140, 20);
[labelFav setFrame:frame];
} completion:^(BOOL finished) {
//[labelFav setHidden:YES];
[UIView animateWithDuration:1.3 animations:^{
CGRect frame = CGRectMake(50, 15, 0, 20);
[labelFav setFrame:frame];
}];
}];
The code works on any other view, but since this is a Custom view by some reason the completion block is not executing.
What happens is that it only does the first block. I set a breakpoint in the "completion" block and it stops there but the animation doesnt happen. I tried to setHidden the label and still it doesnt happen.
Any ideas?
remove auto layout from you Interface builder main screen.
your view may be changing it's frame, but auto layout is (possibly) forcing it elsewhere...
Another way to solve problem. Tested.
[UIView animateWithDuration:1.3 animations:^{
CGRect frame = CGRectMake(50, 15, 140, 20);
[labelViewForFav setFrame:frame];
} completion:^(BOOL finished) {
[UIView animateWithDuration:1.3 animations:^{
CGRect frame = CGRectMake(50, 15, 0, 20);
[labelViewForFav setFrame:frame];
} completion:^(BOOL finished) {
}];
}];
Problem is When you make UIlabel width less than its current width. Animation is not done properly. Animation not visible just jump to final frame.
to solve it Put your label in a view change the size of this view and it will work properly.
I am using the following to make a UIImageView slide a little bit forward, and then slide back farther for a parallax scrolling effect.
Code:
[UIView animateWithDuration:0.2f animations:^{
spendrBckGrnd.frame = CGRectMake(spendrBckGrnd.frame.origin.x + 20, 0, spendrBckGrnd.frame.size.width, spendrBckGrnd.frame.size.height);
}];
[UIView animateWithDuration:0.4f animations:^{
spendrBckGrnd.frame = CGRectMake(spendrBckGrnd.frame.origin.x - 80, 0, spendrBckGrnd.frame.size.width, spendrBckGrnd.frame.size.height);
}];
I am wondering how I might go about applying some easing into the animation, right now if just abruptly slides back and forth quickly. I would like to ease into and out of the sliding animations.
You need to do the second animation block after the first one completes.
[UIView animateWithDuration:0.2f animations:^{
spendrBckGrnd.frame = CGRectMake(spendrBckGrnd.frame.origin.x + 20, 0, spendrBckGrnd.frame.size.width, spendrBckGrnd.frame.size.height);
} completion:^{
[UIView animateWithDuration:0.2f animations:^(BOOL finished){
spendrBckGrnd.frame = CGRectMake(spendrBckGrnd.frame.origin.x - 80, 0, spendrBckGrnd.frame.size.width, spendrBckGrnd.frame.size.height);
}];
}];
This will do the trick:
[UIView animateWithDuration:0.2f delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^(void){
//do your animations
} completion:^(BOOL finished){
}];
Check out this tutorial on UIView animation
http://mobile.tutsplus.com/tutorials/iphone/ios-sdk_uiview-animations/
UIView has a method
// [UIView animateWithDuration:(NSTimeInterval) delay:(NSTimeInterval) options:(UIViewAnimationOptions)animations:^(void)animations completion:^(BOOL finished)completion];
typedef enum {
UIViewAnimationCurveEaseInOut, // slow at beginning and end
UIViewAnimationCurveEaseIn, // slow at beginning
UIViewAnimationCurveEaseOut, // slow at end
UIViewAnimationCurveLinear
}
[UIView animateWithDuration:0.6f
delay:0.1f
options:UIViewAnimationCurveEaseInOut
animations:^{
[starView setCenter:CGPointMake(0, 0)];
[starView setAlpha:0.0f];
}
completion:^(BOOL finished){
[starView removeFromSuperview];
points++;
}
];
Also check out this control on github that creates a parallax effect using a custom container view, much like the top view of Path's timeline.
https://github.com/modocache/MDCParallaxView