Ios 约束到横幅视图的视图会突然跳跃,而不是缓慢设置动画
我正在尝试使用约束设置横幅视图从底部到屏幕的动画。按钮连接到bannerview,并且它应始终与banner保持相同的距离。这就是我得到的: 正如您所看到的,按钮突然跳跃,但我希望它使用UIView.animateWithDuration方法缓慢移动。这是我的密码Ios 约束到横幅视图的视图会突然跳跃,而不是缓慢设置动画,ios,animation,iad,adbannerview,Ios,Animation,Iad,Adbannerview,我正在尝试使用约束设置横幅视图从底部到屏幕的动画。按钮连接到bannerview,并且它应始终与banner保持相同的距离。这就是我得到的: 正如您所看到的,按钮突然跳跃,但我希望它使用UIView.animateWithDuration方法缓慢移动。这是我的密码 @IBOutlet weak var bannerToBottomGuideConstraint: NSLayoutConstraint! @IBOutlet weak var buttonToBannerConstraint: NS
@IBOutlet weak var bannerToBottomGuideConstraint: NSLayoutConstraint!
@IBOutlet weak var buttonToBannerConstraint: NSLayoutConstraint!
@IBOutlet weak var bannerView: ADBannerView!
override func viewDidLoad() {
super.viewDidLoad()
self.canDisplayBannerAds = true
bannerToBottomGuideConstraint.constant -= CGRectGetHeight(bannerView.bounds)
bannerView.backgroundColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0)
}
func bannerViewDidLoadAd(banner: ADBannerView!) {
let time = 0.6
if banner.bannerLoaded == false{
self.view.layoutIfNeeded()
bannerToBottomGuideConstraint.constant += CGRectGetHeight(bannerView.bounds)
UIView.animateWithDuration(time, animations: {
self.view.layoutIfNeeded()
}, completion: {_ in
})
}
}
func bannerView(banner: ADBannerView!, didFailToReceiveAdWithError error: NSError!) {
if bannerView.bannerLoaded{
bannerToBottomGuideConstraint.constant -= CGRectGetHeight(bannerView.bounds)
UIView.animateWithDuration(0, animations: {
self.view.layoutIfNeeded()
}, completion: {_ in
})
}
}
在动画块中调用
banner.superview!而不是self.view.layoutifneed()
!。layoutIfNeeded()
效果很好!谢谢,我真的很期待11月的书