//获取启动图片名（根据设备方向和尺寸）
func splashImageForOrientation(_orientation:UIInterfaceOrientation, size:CGSize)
->String?{
//获取设备尺寸和方向
var viewSize = size
var viewOrientation ="Portrait"
if UIInterfaceOrientationIsLandscape(orientation) {
viewSize = CGSize(width: size.height, height: size.width)
viewOrientation = "Landscape"
}
//遍历资源库中的所有启动图片，找出符合条件的
if let imagesDict = Bundle.main.infoDictionary {
if let imagesArray = imagesDict["UILaunchImages"] as? [[String:String]] {
for dict in imagesArray {
if let sizeString = dict["UILaunchImageSize"],
let imageOrientation = dict["UILaunchImageOrientation"] {
let imageSize = CGSizeFromString(sizeString)
if imageSize.equalTo(viewSize)
&& viewOrientation == imageOrientation {
if let imageName = dict["UILaunchImageName"] {
return imageName
}
}
}
}
}
}
//添加动画
let statusBarOrientation = UIApplication.shared.statusBarOrientation
if let img =splashImageForOrientation(statusBarOrientation,
size:self.view.bounds.size) {
//获取启动图片
let launchImage =UIImage(named: img)
let launchview =UIImageView(frame:UIScreen.main.bounds)
launchview.image= launchImage
//将图片添加到视图上（分两种情况）
//情况1:没有导航栏
//self.view.addSubview(launchview)
//情况2:有导航栏
let delegate = UIApplication.shared.delegate
let mainWindow = delegate?.window
mainWindow!!.addSubview(launchview)
//播放动画效果，完毕后将其移除
UIView.animate(withDuration:1, delay:1.5, options: .beginFromCurrentState,
animations: {
launchview.alpha=0.0
launchview.layer.transform=CATransform3DScale(
CATransform3DIdentity,1.5,1.5,1.0)
}) { (finished) in
launchview.removeFromSuperview()
}
}