CIFilter filterWithName：keysAndValues：从NSDictionary的

Question

集keysAndValues

嗨即时试图做这样的事情：

NSMutableDictionary *param1 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"inputIntensity", [NSNumber numberWithFloat:0.8], nil]; 
[param1 setObject:file forKey:kCIInputImageKey]; 
CIFilter *filter = [CIFilter filterWithName:@"CISepiaTone" keysAndValues:param1]; 

显然它不工作，那么，怎样才能从一个已经存在的字典中的填充keysAndValues？ 谢谢！

Answer 1

您应该使用最简单的构造方法（filterWithName :)，并用[filter setValue:value forKey:key]填充现有字典的键的迭代值。它只需要几行代码。

Answer 2

U可以使用字典是这样的：

NSMutableDictionary *param = [NSMutableDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithFloat:0.8],@"inputIntensity",imageView.image,@"inputImage",nil] 

CIFilter *filter = [CIFilter filterWithName:@"CISepiaTone" keysAndValues:@"inputImage",[param objectForKey:@"inputImage"],@"inputIntensity",[param objectForKey:@"inputIntensity",nil]];