我们可以使用 UIButton 停止或删除焦点上的动画效果并提供其他边框效果 tvOS
Can we stop or remove animation effect on focus with UIButton and give other border effect tvOS
在下面的委托函数中,我尝试执行但没有得到想要的结果
override func didUpdateFocusInContext(context: UIFocusUpdateContext,withAnimationCoordinator coordinator: UIFocusAnimationCoordinator) {
if (context.nextFocusedView == self) {
coordinator.addCoordinatedAnimations({ () -> Void in
self.animationDidStop(CAAnimation(), finished: true)
}, completion: { () -> Void in
})
}
else {
// handle unfocused appearance changes
coordinator.addCoordinatedAnimations({ () -> Void in
self.animationDidStop(CAAnimation(), finished: true)
}, completion: { () -> Void in
})
}
context.nextFocusedView?.layer.shadowOffset = CGSizeZero
context.nextFocusedView?.layer.shadowOpacity = 0.9;
context.nextFocusedView?.layer.shadowRadius = 0;
context.nextFocusedView?.layer.shadowColor= UIColor.orangeColor().CGColor
context.previouslyFocusedView?.layer.shadowOpacity = 0;
}
首先,您必须将按钮类型设置为自定义类型。通过自定义类型,您将不再获得系统动画,因此您必须自己制作所有动画。
然后您可以在 UIViewController 中实现 didUpdateFocusInContext 方法,或者您可以创建自己的 UIButton ] 如果单个屏幕上有更多按钮类型,则子类化。
这是我在 UIButton 子类中使用的代码。这将提供按钮放大以及焦点上的红色边框,并在焦点丢失时进入正常状态。
let scale = 1.1
layer.borderColor = UIColor.redColor().CGColor
override func didUpdateFocusInContext(context: UIFocusUpdateContext, withAnimationCoordinator coordinator: UIFocusAnimationCoordinator) {
if context.nextFocusedView == self {
coordinator.addCoordinatedAnimations({ () -> Void in
self.transform = CGAffineTransformMakeScale(scale, scale)
self.layer.borderWidth = 2
}, completion: nil)
}
else {
coordinator.addCoordinatedAnimations({ () -> Void in
self.transform = CGAffineTransformIdentity
self.layer.borderWidth = 0
}, completion: nil)
}
}
在下面的委托函数中,我尝试执行但没有得到想要的结果
override func didUpdateFocusInContext(context: UIFocusUpdateContext,withAnimationCoordinator coordinator: UIFocusAnimationCoordinator) {
if (context.nextFocusedView == self) {
coordinator.addCoordinatedAnimations({ () -> Void in
self.animationDidStop(CAAnimation(), finished: true)
}, completion: { () -> Void in
})
}
else {
// handle unfocused appearance changes
coordinator.addCoordinatedAnimations({ () -> Void in
self.animationDidStop(CAAnimation(), finished: true)
}, completion: { () -> Void in
})
}
context.nextFocusedView?.layer.shadowOffset = CGSizeZero
context.nextFocusedView?.layer.shadowOpacity = 0.9;
context.nextFocusedView?.layer.shadowRadius = 0;
context.nextFocusedView?.layer.shadowColor= UIColor.orangeColor().CGColor
context.previouslyFocusedView?.layer.shadowOpacity = 0;
}
首先,您必须将按钮类型设置为自定义类型。通过自定义类型,您将不再获得系统动画,因此您必须自己制作所有动画。
然后您可以在 UIViewController 中实现 didUpdateFocusInContext 方法,或者您可以创建自己的 UIButton ] 如果单个屏幕上有更多按钮类型,则子类化。
这是我在 UIButton 子类中使用的代码。这将提供按钮放大以及焦点上的红色边框,并在焦点丢失时进入正常状态。
let scale = 1.1
layer.borderColor = UIColor.redColor().CGColor
override func didUpdateFocusInContext(context: UIFocusUpdateContext, withAnimationCoordinator coordinator: UIFocusAnimationCoordinator) {
if context.nextFocusedView == self {
coordinator.addCoordinatedAnimations({ () -> Void in
self.transform = CGAffineTransformMakeScale(scale, scale)
self.layer.borderWidth = 2
}, completion: nil)
}
else {
coordinator.addCoordinatedAnimations({ () -> Void in
self.transform = CGAffineTransformIdentity
self.layer.borderWidth = 0
}, completion: nil)
}
}