我尝试使用CICrop裁剪图像,但是当我尝试裁剪时,它会因此错误消息而崩溃:
因未捕获的异常终止应用' NSUnknownKeyException', 原因:' [setValue:forUndefinedKey:]:这个类 密钥不符合密钥值编码 CIAttributeTypeRectangle' ***第一次抛出调用堆栈:(0x1847fc2d8 0x1964c80e4 0x1847fbf5c 0x184e34a4c 0x185635480 0x10005e554 0x10005eb7c 0x1892a9398 0x189292474 0x1892a8d34 0x1892a89c0 0x1892a1efc 0x189275120 0x1895162b8 0x189273634 0x1847b4240 0x1847b34e4 0x1847b1594 0x1846dd2d4 0x18e1336fc 0x1892daf40 0x10006481c 0x196b72a08) libc ++ abi.dylib:以未捕获的类型异常终止 NSException
这是我的代码:
@IBAction func CropButton(sender: UIButton)
{
let CropBoxHeight = CGFloat(200)
let CropBoxWidth = CGFloat(200)
let Rectangle = CIVector(x: view.center.x, y: view.center.y, z: 200, w: 200)
let filter = CIFilter(name: "CICrop")
let inputImage = CIImage(image: originalImage)
let ciContext = CIContext(options: nil)
filter.setDefaults()
filter.setValue(inputImage, forKey: kCIInputImageKey)
filter.setValue(Rectangle, forKey: kCIAttributeTypeRectangle)
let originalOrientation: UIImageOrientation = imageView.image!.imageOrientation
let originalScale = imageView.image!.scale
let cgImage = ciContext.createCGImage(filter.outputImage, fromRect: inputImage.extent())
imageView.image = UIImage(CGImage: cgImage, scale: originalScale, orientation: originalOrientation)!
}
它崩溃了这一行:
filter.setValue(Rectangle, forKey: kCIAttributeTypeRectangle)
答案 0 :(得分:5)
您似乎需要使用
filter.setValue(Rectangle, forKey: "inputRectangle")
而不是
filter.setValue(Rectangle, forKey: kCIAttributeTypeRectangle)
这可以在official documentation中找到。但是,我无法找到此密钥的任何内置常量。