这是我的过滤器代码:
let filter = CIFilter(name: "CIPhotoEffectMono")
filter!.setValue(CIImage(image: imageView.image!) , forKey: kCIInputImageKey)
filter!.setValue(0.3, forKey: kCIInputIntensityKey)
let context = CIContext(options:nil)
let cgimg = context.createCGImage(filter!.outputImage!, fromRect: filter!.outputImage!.extent)
let newImage = UIImage(CGImage:cgimg)
self.imageView.image = newImage
以下是错误消息:
由于未捕获的异常'NSUnknownKeyException'而终止应用程序,原因:'[setValue:forUndefinedKey:]:此类不是键输入密度的键值编码兼容。'
第一次抛出调用堆栈: (
0 CoreFoundation 0x0000000105f9af65 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x0000000107f56deb objc_exception_throw + 48
2 CoreFoundation 0x0000000105f9aba9 - [NSException raise] + 9
3 CoreImage 0x0000000106354f7a - [CIFilter setValue:forUndefinedKey:] + 137
4 Foundation 0x000000010668af5b - [NSObject(NSKeyValueCoding)setValue:forKey:] + 288
5 MyFirstApp 0x0000000105a26bac _TFC10MyFirstApp14ViewController13lightBlendBtnfS0_FPSs9AnyObject_T_ + 988
6 MyFirstApp 0x0000000105a27076 _TToFC10MyFirstApp14ViewController13lightBlendBtnfS0_FPSs9AnyObject_T_ + 54
7 UIKit 0x0000000106ae01fa - [UIApplication sendAction:to:from:forEvent:] + 92
8 UIKit 0x0000000106c44504 - [UIControl sendAction:to:forEvent:] + 67
9 UIKit 0x0000000106c447d0 - [UIControl _sendActionsForEvents:withEvent:] + 311
10 UIKit 0x0000000106c43906 - [UIControl touchesEnded:withEvent:] + 601
11 UIKit 0x0000000106b4aaa3 - [UIWindow _sendTouchesForEvent:] + 835
12 UIKit 0x0000000106b4b691 - [UIWindow sendEvent:] + 865
13 UIKit 0x0000000106afd752 - [UIApplication sendEvent:] + 263
14 UIKit 0x00000001140f4a55 - [UIApplicationAccessibility sendEvent:] + 77
15 UIKit 0x0000000106ad8fcc _UIApplicationHandleEventQueue + 6693
16 CoreFoundation 0x0000000105ec70a1 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17
17 CoreFoundation 0x0000000105ebcfcc __CFRunLoopDoSources0 + 556
18 CoreFoundation 0x0000000105ebc483 __CFRunLoopRun + 867
19 CoreFoundation 0x0000000105ebbe98 CFRunLoopRunSpecific + 488
20 GraphicsServices 0x000000010cdccad2 GSEventRunModal + 161
21 UIKit 0x0000000106ade676 UIApplicationMain + 171
22 MyFirstApp 0x0000000105a29fed main + 109
23 libdyld.dylib 0x0000000108a8292d start + 1
)
libc ++ abi.dylib:以NSException类型的未捕获异常终止 (lldb)
答案 0 :(得分:2)
CIPhotoEffectMono
不支持kCIInputIntensityKey
。实际上,除了输入图像之外,没有一个光效滤波器具有任何输入。如果您删除filter!.setValue(0.3, forKey: kCIInputIntensityKey)
,您的代码应该可以正常工作。
您可以使用filter.inputKeys
检查过滤器支持的输入,该过滤器返回包含所有输入名称的字符串数组。
西蒙