Swift 使用随机延迟(一个接一个)和随机水平位置设置滚动图像的动画
我有一张x图像的列表。对于每个图像,我创建一个UIImageView,其中y为视图高度,x为随机值Swift 使用随机延迟(一个接一个)和随机水平位置设置滚动图像的动画,swift,animation,uiview,uiviewanimation,Swift,Animation,Uiview,Uiviewanimation,我有一张x图像的列表。对于每个图像,我创建一个UIImageView,其中y为视图高度,x为随机值 func computeImageFrame() -> CGRect { let imageWidth: CGFloat = 91 let imageHeight: CGFloat = 131 var x = xPos() let y = yPos() if (x > ((self.backgroundView?.bounds.width)!
func computeImageFrame() -> CGRect {
let imageWidth: CGFloat = 91
let imageHeight: CGFloat = 131
var x = xPos()
let y = yPos()
if (x > ((self.backgroundView?.bounds.width)! - (self.backgroundView?.bounds.width)! * 0.20)){
x = x.truncatingRemainder(dividingBy: ((self.backgroundView?.bounds.width)! - (self.backgroundView?.bounds.width)! * 0.20))}
return CGRect(x: x, y: y, width: imageWidth, height: imageHeight)
}
在哪里
现在,我在UIImageViews上有一个列表,其中x是随机的,y是viewHeight,现在我正在尝试设置动画
func animateBackgroundFor(_ imageViews: [UIImageView]) {
for imageView in imageViews {
self.backgroundView.addSubview(imageView)
}
// Animate background
UIView.animate(withDuration: 6.0, delay: 0.0, options: [UIViewAnimationOptions.repeat, UIViewAnimationOptions.curveLinear], animations: {
for imageView in imageViews {
imageView.frame = imageView.frame.offsetBy(dx: 0.0, dy: -7 * imageView.frame.size.height)
}
}, completion: nil)
}
我的问题是如何让它们一个接一个地拍摄,而不是同时拍摄,以及如何在每个循环中重新计算每个图像的水平位置
多谢各位
编辑:忘了提了,我已经试过了
func animateBackgroundFor(_ imageViews: [UIImageView]) {
for imageView in imageViews {
self.backgroundView.addSubview(imageView)
}
for imageView in imageViews {
UIView.animate(withDuration: 6.0, delay: 1.2, options: [UIViewAnimationOptions.repeat, UIViewAnimationOptions.curveLinear], animations: {
imageView.frame = imageView.frame.offsetBy(dx: 0.0, dy: -7 * imageView.frame.size.height)
}, completion: nil)
}
}
尝试以下解决方案。 将以下内容添加到控制器的私有属性:
private var imageview=[UIImageView]()
然后以以下方式修改animateBackgroundFor()
方法:
func animateBackgroundFor(_ imageViews: [UIImageView]) {
for imageView in imageViews {
self.backgroundView.addSubview(imageView)
}
self.imageViews = imageViews
animateImage(at: 0)
}
func animateImage(at index: NSInteger) {
guard index >= 0 && index < imageViews.count else { return }
let imageView = imageViews[index]
imageView.frame = computeImageFrame()
UIView.animate(withDuration: 6.0,
delay: 0.0,
options: UIViewAnimationOptions.curveLinear,
animations: {
imageView.frame = imageView.frame.offsetBy(dx: 0.0, dy: -7 * imageView.frame.size.height)
},
completion: {
[weak self] finished in
guard finished && self != nil else { return }
let nextIndex = index + 1 < self!.imageViews.count ? index + 1 : 0
self!.animateImage(at: nextIndex)
})
}
func animateBackgroundFor(ImageView:[UIImageView]){
对于imageView中的imageView{
self.backgroundView.addSubview(imageView)
}
self.imageview=imageview
动画图像(位于:0)
}
func animateImage(索引处:NSInteger){
保护索引>=0&&index
效果很好!谢谢
func animateBackgroundFor(_ imageViews: [UIImageView]) {
for imageView in imageViews {
self.backgroundView.addSubview(imageView)
}
self.imageViews = imageViews
animateImage(at: 0)
}
func animateImage(at index: NSInteger) {
guard index >= 0 && index < imageViews.count else { return }
let imageView = imageViews[index]
imageView.frame = computeImageFrame()
UIView.animate(withDuration: 6.0,
delay: 0.0,
options: UIViewAnimationOptions.curveLinear,
animations: {
imageView.frame = imageView.frame.offsetBy(dx: 0.0, dy: -7 * imageView.frame.size.height)
},
completion: {
[weak self] finished in
guard finished && self != nil else { return }
let nextIndex = index + 1 < self!.imageViews.count ? index + 1 : 0
self!.animateImage(at: nextIndex)
})
}