快速，旋转图像视图并将旋转的图像视图设置为 uibutton

Posted 2023-03-16

【中文标题】快速，旋转图像视图并将旋转的图像视图设置为 uibutton

【英文标题】：swift, rotate image view and set rotated image view to uibutton

【发布时间】：2016-01-15 11:49:11

【问题描述】：

我想点击按钮并用动画旋转它的图像。动画完成后，我想为按钮设置新的旋转图像。但是由于某种原因，旋转的图像未设置为正常状态的按钮。它设置为突出显示状态。我有布尔值 isPriceOrdered ，根据这个布尔值我设置箭头向上或向下。这是一个代码：

   UIView.animateWithDuration(0.3, animations: 
             self.buttonimage.imageView!.transform = CGAffineTransformMakeRotation(CGFloat(M_PI))
        , completion: 
            (success) in
            if self.isPriceOrderAsc == true 
                self.isPriceOrderAsc = false
                let rotatedimage = UIImage(CGImage: (self.buttonimage.imageView!.image!.CGImage)!, scale: CGFloat(1.0), orientation: UIImageOrientation.DownMirrored)

                self.buttonimage.setImage(rotatedimage, forState: .Normal)


            else
                self.isPriceOrderAsc = true
                let rotatedimage = UIImage(CGImage: (self.buttonimage.imageView?.image!.CGImage)!, scale: CGFloat(1.0), orientation: UIImageOrientation.UpMirrored)

                self.buttonimage.setImage(rotatedimage, forState: .Normal)
            
    )

【参考方案1】：

问题是我在转换图像之前没有保存按钮的原始转换。在变换图像度数之前保存变换后的原始图像。这是一个代码：

var originalTransform: CGAffineTransform?

 UIView.animateWithDuration(0.3, animations: 

            if self.buttonPriceOrder.imageView != nil 
                originalTransform = self.buttonPriceOrder.imageView!.transform
                self.buttonPriceOrder.imageView!.transform = CGAffineTransformMakeRotation(CGFloat(M_PI))
            

        , completion: 
            (success) in

            if success 

                self.buttonPriceOrder.imageView?.transform = originalTransform!

                if self.isPriceOrderAsc == true 
                    self.isPriceOrderAsc = false
                    let rotatedimage = UIImage(CGImage: (self.buttonPriceOrder.imageView!.image!.CGImage)!, scale: CGFloat(1.0), orientation: UIImageOrientation.DownMirrored)
                    self.buttonPriceOrder.setImage(rotatedimage, forState: .Normal)

                else
                    self.isPriceOrderAsc = true
                    let rotatedimage = UIImage(CGImage: (self.buttonPriceOrder.imageView?.image!.CGImage)!, scale: CGFloat(1.0), orientation: UIImageOrientation.UpMirrored)
                    self.buttonPriceOrder.imageView?.image = nil
                    self.buttonPriceOrder.setImage(rotatedimage, forState: .Normal)

                
                self.isFilterActive = true
                self.delegate.filterUpdated(self)
            

    )

在将图像设置为按钮之前旋转图像后，将按钮变换设置为原始图像。