iphone - CategoryDistortionEffect 示例的 CIFilter

Question

有人可以展示一个为 kCICategoryDistortionEffect 初始化 CIFilter 的示例吗？

我需要为我的摄影创建失真效果。我已经读过它是可能的，在 IOS 5 中使用 CIFilter。但我找不到合适的代码来实现它。

Answer 1

我一直在寻找这个。到目前为止，这似乎在 iOS 5 中不可用。这是证据：

如果你执行：

NSArray *properties = [CIFilter filterNamesInCategory:
                       kCICategoryBuiltIn];

你会看到它只返回以下不包含任何 kCICategoryDistortionEffect 的列表。它只包含：

CIAdditionCompositing,
CIAffineTransform,
CICheckerboardGenerator,
CIColorBlendMode,
CIColorBurnBlendMode,
CIColorControls,
CIColorCube,
CIColorDodgeBlendMode,
CIColorInvert,
CIColorMatrix,
CIColorMonochrome,
CIConstantColorGenerator,
CICrop,
CIDarkenBlendMode,
CIDifferenceBlendMode,
CIExclusionBlendMode,
CIExposureAdjust,
CIFalseColor,
CIGammaAdjust,
CIGaussianGradient,
CIHardLightBlendMode,
CIHighlightShadowAdjust,
CIHueAdjust,
CIHueBlendMode,
CILightenBlendMode,
CILinearGradient,
CILuminosityBlendMode,
CIMaximumCompositing,
CIMinimumCompositing,
CIMultiplyBlendMode,
CIMultiplyCompositing,
CIOverlayBlendMode,
CIRadialGradient,
CISaturationBlendMode,
CIScreenBlendMode,
CISepiaTone,
CISoftLightBlendMode,
CISourceAtopCompositing,
CISourceInCompositing,
CISourceOutCompositing,
CISourceOverCompositing,
CIStraightenFilter,
CIStripesGenerator,
CITemperatureAndTint,
CIToneCurve,
CIVibrance,
CIVignette,
CIWhitePointAdjust

并且缺少我们感兴趣的：

CICategoryDistortionEffect,
CIBumpDistortion,
CIBumpDistortionLinear,
CICircleSplashDistortion,
CICircularWrap,
CIDisplacementDistortion,
CIGlassDistortion,
CIGlassLozenge,
CIHoleDistortion,
CIPinchDistortion,
CITorusLensDistortion,
CITwirlDistortion,
CIVortexDistortion

Answer 2

您可以使用以下代码查看所有过滤器类型

NSArray *filterNames =[CIFilter filterNamesInCategory:kCICategoryBuiltIn];
NSLog(@"Built in filters");
for (NSString *currentFilterName in filterNames)
{
    NSLog(@"%@", currentFilterName);
}