animation

问题 I'm working on an application where I'm trying to Animate a View based on scroll Position of multiple ScrollView s. This is how the screen looks. The above screen has 2 parts A View component on Top A TabNavigator component at the Bottom each tab in TabNavigator has a ScrollView in it (in this case there are 2 but can be more), What I want to achieve is to collapse the View as the user scrolls down and expand it when the user scrolls up. On a single Tab I was doing well, it was working

问题 According to my logic, on tap gesture to the image it should be changed with fade animation, but actual result is that image changes without animation. Tested with Xcode 11.3.1, Simulator 13.2.2/13.3 if it is important. P.S. Images are named as "img1", "img2", "img3", etc. enum ImageEnum: String { case img1 case img2 case img3 func next() -> ImageEnum { switch self { case .img1: return .img2 case .img2: return .img3 case .img3: return .img1 } } } struct ContentView: View { @State private var

问题 I made an animation in Blender and moved it to Xcode and it is converted from .dae file to .scn by Xcode. I can play the animation in scene graph of Xcode as it is designed in the Blender. I am loading geometry and animation and create node for animated object. I use SCNAnimationPlayer() to load animation. The code is below. let scene = SCNScene(named: "scene.scn")! let geometry = scene.rootNode.childNode(withName: "animatedGeo", recursively:true).geometry! let animationNode = SCNNode

问题 How to get Position of moving view using translate animation. TranslateAnimation animation = new TranslateAnimation(0.0f, 300.0f, 0.0f, 0.0f); animation.setDuration(500); animation.setFillAfter(true); mainview.startAnimation(animation); 回答1: You need to set a new AnimationListener, before the startAnimation command. You can use Override methods of AnimationListener and please debug it for a better understanding. You need setAnimationListener before starting your animation. 来源： https:/

问题 I have a drawer that hovers over a view. The user can vertically drag up to open and drag down to close it. I have the opening and closing part working smoothly. What I have a problem with is making sure that the drag animation stops once it reaches about 200 pixels from the top of the phone screen and also not drag beyond 100 pixels from the bottom of the screen. It's an absolute element and I have used Animated.ValueXY() . I know that I need to stop animation in the onPanResponderMove: (e,

问题 This question already has answers here : Set CSS transition to use speed instead of duration? (3 answers) Closed 3 years ago . I have a CSS animation that makes an element move an undefined distance in a straight line. Animations have fixed durations, as far as I know, so the animation always takes the same amount of time to run, no matter how far the element has to move. How do I make it so the animation doesn't have a fixed duration , but a fixed movement speed ? I want something like "X

问题 I want to achieve animation when I send my message it goes from bottom to top like flying a bird (though I have done it :P) but while flying, that chat bubble view's radius is also changing(This is the thing I am not able to achieve). Please help me to achieve this kind of animation or give me some sort of hint. Thank you I have used below code to set radius and then translate that view using xml file but not able to change radius on the go. GradientDrawable gd = new GradientDrawable(); //

问题 I want to achieve animation when I send my message it goes from bottom to top like flying a bird (though I have done it :P) but while flying, that chat bubble view's radius is also changing(This is the thing I am not able to achieve). Please help me to achieve this kind of animation or give me some sort of hint. Thank you I have used below code to set radius and then translate that view using xml file but not able to change radius on the go. GradientDrawable gd = new GradientDrawable(); //

问题 I am trying to animate a UIView through non linear path(i'm not trying to draw the path itself) like this : The initial position of the view is determinated using a trailing and bottom constraint ( viewBottomConstraint.constant == 100 & viewTrailingConstraint.constant == 300 ) I am using UIView.animatedWithDuration like this : viewTrailingConstraint.constant = 20 viewBottomConstraint.constant = 450 UIView.animateWithDuration(1.5,animation:{ self.view.layoutIfNeeded() },completition:nil) But

问题 I am studying Animation in Core Animation Programming Guide and I get stuck on comprehending pause and resume animation on a layer. The document tells me how to pause and resume animation without clear explanation. I think the key is to understand what is timeOffset and beginTime method of CAlayer . These code is pause and resume animation. In resumeLayer method, layer.beginTime = timeSincePause; this line really make me confused. -(void)pauseLayer:(CALayer*)layer { CFTimeInterval pausedTime