如何旋轉iPhone上的圖像？

2009-06-05 Raju

Dupe？ http://stackoverflow.com/questions/917713/uiimage-rotation-custom-degrees – crashmstr 2009-06-05 12:53:16

可能是一個騙局，但取決於OP實際上想做什麼。 Raju，目標是什麼？你的意思是「獲取旋轉的UIImage的副本嗎？」或者也許「顯示旋轉的圖像？」或者，也許「使圖像旋轉動畫？」這是一個非常含糊的問題。 – 2009-06-05 14:17:29

這也可能類似於他所問：http://stackoverflow.com/questions/839296/how-can-i-rotate-a-uiimageview-with-respect-to-any-point-other-than-its - 中心 – 2009-06-05 16:24:38

您可以使用CCGAffineTransform旋轉視圖。您可以通過指定要旋轉的弧度度數來創建旋轉矩陣，然後將旋轉矩陣設置爲視圖的.transform屬性。

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2009-06-09 13:36:18

一個偉大的旋轉和圖像的UIImage類艾倫布倫森可以在這裏找到： http://www.platinumball.net/blog/2010/01/31/iphone-uiimage-rotation-and-scaling/

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2009-11-15 11:23:32 Ross

感謝您的偉大鏈接:)。 – 2013-03-12 08:33:13

image.transform = CGAffineTransformMakeRotation(3.142);

旋轉180度。

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2011-10-30 15:44:13 miniman

//If someone needs in swift 3 



    func rotateImageClockWise(theImage: UIImage,imageView:UIImageView) -> UIImage { 

     var orient: UIImageOrientation! 
     let imgOrientation = theImage.imageOrientation 


     UIView.transition(with: imageView, duration: 0.2, options: .transitionCrossDissolve, animations: {() -> Void in 

      switch imgOrientation { 

      case .left: 
       orient = .up 

      case .right: 
       orient = .down 

      case .up: 
       orient = .right 

      case .down: 
       orient = .left 

      case .upMirrored: 
       orient = .rightMirrored 

      case .downMirrored: 
       orient = .leftMirrored 

      case .leftMirrored: 
       orient = .upMirrored 

      case .rightMirrored: 
       orient = .downMirrored 
      } 


     }, completion: { _ in }) 

     let rotatedImage = UIImage(cgImage: theImage.cgImage!, scale: 1.0, orientation: orient) 
     return rotatedImage 
    } 
//Just call the method like this : 

rotateImageClockWise(theImage: UIImage,imageView:UIImageView)

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2017-08-24 13:24:47

如何旋轉iPhone上的圖像？

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