我正在构建关于FloatingButton的示例.
但是旋转图像有些麻烦.我希望它像这个链接一样旋转
https://github.com/yoavlt/LiquidFloatingActionButton
但我的按钮是：
正如你所看到的,当我第一次点击时,它运行良好：D,它变换为x,但是当我再次点击时,我希望它恢复原状,但它不能很好地运行.
这是我的代码：
import UIKit
class ViewController: UIViewController {
@IBOutlet var floatingButton: UIImageView!
var floatingButtonIsActive = false
override func viewDidLoad() {
super.viewDidLoad()
addShadowToFloatingButton()
let gesture = UITapGestureRecognizer(target: self,action: #selector(floatingButtonTapped(_:)))
floatingButton.addGestureRecognizer(gesture)
}
private func addShadowToFloatingButton() {
floatingButton.layer.shadowColor = UIColor.grayColor().CGColor
floatingButton.layer.shadowOffset = CGSize(width: -2,height: 2)
floatingButton.layer.shadowOpacity = 1
floatingButton.layer.shadowRadius = 1
}
func floatingButtonTapped(sender: UITapGestureRecognizer) {
if floatingButtonIsActive == false {
UIView.animateWithDuration(0.5,delay: 0.0,usingSpringWithDamping: 0.5,initialSpringVelocity: 5,options: .CurveEaseInOut,animations: {
self.floatingButton.transform = CGAffineTransformMakeRotation(CGFloat(M_PI_4))
},completion: { _ in
self.floatingButtonIsActive = true
})
} else {
UIView.animateWithDuration(0.5,animations: {
self.floatingButton.transform = CGAffineTransformMakeRotation(CGFloat(-M_PI_4))
},completion: { _ in
self.floatingButtonIsActive = false
})
}
}
}
完成后将转换设置为CGAffineTransformIdentity.这是它最初的转变.设置变换时,无论当前处于什么角度,都会告诉它旋转到的绝对角度.
func floatingButtonTapped(sender: UITapGestureRecognizer) {
if floatingButtonIsActive == false {
UIView.animateWithDuration(0.5,animations: {
self.floatingButton.transform = CGAffineTransformMakeRotation(CGFloat(M_PI_4))
},completion: { _ in
self.floatingButtonIsActive = true
})
} else {
UIView.animateWithDuration(0.5,animations: {
self.floatingButton.transform = CGAffineTransformIdentity
},completion: { _ in
self.floatingButtonIsActive = false
})
}
}
