NSImageView的连续旋转(因此它似乎是动画的) [英] Continuous Rotation of NSImageView (so it appears to be animated)

问题描述

SWIFT-OSX

我在Main.storyboard中设置了一堆imageViews.我正在尝试让它们在应用启动时旋转，我希望它们无限期地运行.我遇到过roateByAngle(angle:CGFloat)，但这并没有设置动画效果，而是跳到了新角度.

I have a bunch of imageViews set in my Main.storyboard. I am trying to make them spin when the app starts and i would like them to indefinitely. I came across the roateByAngle(angle: CGFloat), but this doesn't animate it, instead it just jumps to the new angle.

我想创建两个函数spinClockwise()和spinAntiClockwise()，所以我可以在viewDidLoad中调用它们，它们将一直旋转.

I would like to make two functions, spinClockwise() and spinAntiClockwise() so I can just call them in the viewDidLoad and they will just keep turning.

我一直在使用CATransform3DMakeRotation，但似乎无法获得我想要的结果

Ive been playing with CATransform3DMakeRotation but cannot seem to get my desired results

        let width = myImg.frame.width / 2
        let height = myImg.frame.height / 2
        myImg.layer?.transform = CATransform3DMakeRotation(180,  width, height, 1)

让我知道我是否可以更具体.谢谢

Let me know if i can be more specific. Thanks

推荐答案

您可以像这样添加UIView或UIImageView的扩展名:

You could add an extension of UIView or UIImageView like this:

extension UIView {

    ///The less is the timeToRotate, the more fast the animation is !
    func spinClockwise(timeToRotate: Double) {
        startRotate(CGFloat(M_PI_2), timeToRotate: timeToRotate)
    }

    ///The less is the timeToRotate, the more fast the animation is !
    func spinAntiClockwise(timeToRotate: Double) {
        startRotate(CGFloat(-M_PI_2), timeToRotate: timeToRotate)
    }

    func startRotate(angle: CGFloat, timeToRotate: Double) {
        UIView.animateWithDuration(timeToRotate, delay: 0.0, options:[UIViewAnimationOptions.CurveLinear, UIViewAnimationOptions.Repeat], animations: {
            self.transform = CGAffineTransformMakeRotation(angle)
            }, completion: nil)
        print("Start rotating")
    }

    func stopAnimations() {
        self.layer.removeAllAnimations()
        print("Stop rotating")
    }
}

因此，当您要旋转 myImg 时，只需调用:

So when you want to rotate your myImg, you just have to call:

myImg.spinClockwise(3)

当您要停止它时:

myImg.stopAnimations()

注意:我添加了一个游乐场只是为了您可以对其进行测试;)

NOTE: I added a playground just so you can test it out ;)

干杯！

我很糟糕，这是NSView的示例:

My bad, Here is the example for NSView:

extension NSView {

    ///The less is the timeToRotate, the more fast the animation is !
    func spinClockwise(timeToRotate: Double) {
        startRotate(CGFloat(-1 * M_PI * 2.0), timeToRotate: timeToRotate)
    }

    ///The less is the timeToRotate, the more fast the animation is !
    func spinAntiClockwise(timeToRotate: Double) {
        startRotate(CGFloat(M_PI * 2.0), timeToRotate: timeToRotate)
    }

    func startRotate(angle: CGFloat, timeToRotate: Double) {

        let rotateAnimation = CABasicAnimation(keyPath: "transform.rotation")
        rotateAnimation.fromValue = 0.0
        rotateAnimation.toValue = angle
        rotateAnimation.duration = timeToRotate
        rotateAnimation.repeatCount = .infinity

        self.layer?.addAnimation(rotateAnimation, forKey: nil)

        Swift.print("Start rotating")
    }

    func stopAnimations() {
        self.layer?.removeAllAnimations()
        Swift.print("Stop rotating")
    }
}

重要说明:现在，在测试之后，我注意到您必须将NSView的锚点设置在中间，以便它可以绕其中心旋转:

Important note: Now, after my tests, I noticed that you must set the anchor point of your NSView in the middle so that it can rotate around its center:

view.layer?.anchorPoint = CGPointMake(0.5, 0.5)

我添加了一个带有 OSX示例

这篇关于NSImageView的连续旋转(因此它似乎是动画的)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！