2014/10/15 下午 10:03:37

iphone Programming Glossary: animatable

http://stackoverflow.com/questions/14192816/create-a-custom-animatable-property

a custom animatable property On UIView you can change the backgroundColour animated. And on a UISlideView you can change the value animated... question If you extend CALayer and implement your custom void drawInContext CGContextRef context You can make an animatable property by overriding needsDisplayForKey in your custom CALayer class like this BOOL needsDisplayForKey NSString key if..

Fading out an UIButton when touched

http://stackoverflow.com/questions/1517149/fading-out-an-uibutton-when-touched

Cheers Nik iphone cocoa touch uikit uibutton share improve this question Since selected is not an animatable property that won't work as you've found out . My solution would be to have the selected state of the btn be in a separate..

How to crossfade between 2 images on iPhone using Core Animation

http://stackoverflow.com/questions/1550206/how-to-crossfade-between-2-images-on-iphone-using-core-animation

to crossfade between 2 images on iPhone using Core Animation I'm doing this to learn how to work with Core Animation animatable properties on iPhone not to learn how to crossfade images per se . Reading similar questions on SO leads me to believe it..

How to Check if Parallax is enabled

http://stackoverflow.com/questions/20361033/how-to-check-if-parallax-is-enabled

come up with something better EDIT sample code. Issues faced are as discussed in the comments the property has to be animatable which has a net effect of requiring a manual polling loop. Add an instance of this view somewhere in your app ideally at.. quick note on presentationLayer The property supplied to UIInterpolatingMotionEffect must be animatable. So we can't just create our own. UIKit will then apply effects directly to the layer. Furthermore the layer itself will..

Animating a custom property of CALayer subclass

http://stackoverflow.com/questions/2395382/animating-a-custom-property-of-calayer-subclass

I'd really like to animate this property via CABasicAnimation but it seems CABasicAnimation only works on so called animatable properties bounds position etc . Is there something I can override to make my custom myInt property animatable iphone core.. called animatable properties bounds position etc . Is there something I can override to make my custom myInt property animatable iphone core animation calayer share improve this question Yes it's possible only in the latest Core Animation releases..

How to animate the change of image in an UIImageView?

http://stackoverflow.com/questions/2834573/how-to-animate-the-change-of-image-in-an-uiimageview

display that in this UIImageView. If I just set myImageView.image newImage the new image is visible immediately. Not animatable. I want it to nicely fade into the new image. I thought maybe there's a better solution than just creating a new UIImageView..

What are block-based animation methods in iPhone OS 4.0?

http://stackoverflow.com/questions/3126833/what-are-block-based-animation-methods-in-iphone-os-4-0

animations A block object containing the changes to commit to the views. This is where you programmatically change any animatable properties of the views in your view hierarchy. This block takes no parameters and has no return value. This parameter must..

How to animate the background color of a UILabel?

http://stackoverflow.com/questions/3762561/how-to-animate-the-background-color-of-a-uilabel

this question I can't find it documented anywhere but it appears the backgroundColor property of UILabel is not animatable as your code works fine with a vanilla UIView . This hack appears to work however as long as you don't set the background..

Why animating custom CALayer properties causes other properties to be nil during animation?

http://stackoverflow.com/questions/4016496/why-animating-custom-calayer-properties-causes-other-properties-to-be-nil-during

ctx Filling it CGContextSetFillColorWithColor ctx self.tint.CGColor CGContextFillPath ctx I want the radius to be animatable so I've implemented BOOL needsDisplayForKey NSString key if key isEqualToString @ radius return YES return super needsDisplayForKey..

Applying a Gradient to CAShapeLayer

http://stackoverflow.com/questions/4733966/applying-a-gradient-to-cashapelayer

layer class but it appears to only support solid fill coloring whereas I'd like it to have a gradient fill actually an animatable gradient at that . Everything else to do with CAShapeLayer shadows shapes stroke color animatable shape path is fantastic... fill actually an animatable gradient at that . Everything else to do with CAShapeLayer shadows shapes stroke color animatable shape path is fantastic. I've tried placing a CAGradientLayer inside a CAShapeLayer or indeed setting the CAShapeLayer as..

How do you explicitly animate a CALayer's backgroundColor?

http://stackoverflow.com/questions/518192/how-do-you-explicitly-animate-a-calayers-backgroundcolor

because handing it off as a pointer wrapped in an NSValue is not the way to pass it along. backgroundColor is an animatable property of CALayer so my question is how do you set the From or To values for this particular property preferably in a..

Proper usage of transitionFromViewController:toViewController:duration:options:animations:completion:

http://stackoverflow.com/questions/8453653/proper-usage-of-transitionfromviewcontrollertoviewcontrollerdurationoptionsa

parameter is used for animating properties of your views in your view hierarchy during the transition. The list of animatable properties can be found in the UIView documentation under the Animations heading. As an example say you don't want your..