|
// 图片旋转，有时服务器不处理图片，显示客户端时没有正常显示
func fixOrientation() ->
UIImage {
if
self.imageOrientation == .up {
return
self
}
var transform =
CGAffineTransform.identity
switch
self.imageOrientation {
case .down, .downMirrored:
transform = transform.translatedBy(x:
self.size.width, y:
self.size.height)
transform = transform.rotated(by: .pi)
break
case .left, .leftMirrored:
transform = transform.translatedBy(x:
self.size.width, y:
0)
transform = transform.rotated(by: .pi /
2)
break
case .right, .rightMirrored:
transform = transform.translatedBy(x:
0, y: self.size.height)
transform = transform.rotated(by: -.pi /
2)
break
default:
break
}
switch
self.imageOrientation {
case .upMirrored, .downMirrored:
transform = transform.translatedBy(x:
self.size.width, y:
0)
transform = transform.scaledBy(x:
-1, y: 1)
break
case .leftMirrored, .rightMirrored:
transform = transform.translatedBy(x:
self.size.height, y:
0);
transform = transform.scaledBy(x:
-1, y: 1)
break
default:
break
}
let ctx =
CGContext(data: nil, width:
Int(self.size.width), height:
Int(self.size.height), bitsPerComponent:
self.cgImage!.bitsPerComponent, bytesPerRow:
0, space: self.cgImage!.colorSpace!,
bitmapInfo: self.cgImage!.bitmapInfo.rawValue)
ctx?.concatenate(transform)
switch
self.imageOrientation {
case .left, .leftMirrored, .right,
.rightMirrored:
ctx?.draw(self.cgImage!, in:
CGRect(x: CGFloat(0), y:
CGFloat(0), width:
CGFloat(size.height), height:
CGFloat(size.width)))
break
default:
ctx?.draw(self.cgImage!, in:
CGRect(x: CGFloat(0), y:
CGFloat(0), width:
CGFloat(size.width), height:
CGFloat(size.height)))
break
}
let cgimg:
CGImage = (ctx?.makeImage())!
let img =
UIImage(cgImage: cgimg)
return img
} | 
转播
