Iphone CIFilter过滤器名称：keysAndValues:从NSDictionary设置keysAndValues

嗨，我正在尝试这样做：

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

 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]];

显然，它不起作用，那么，如何从已经存在的字典中填充keysAndValues呢？

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谢谢大家!

您应该使用最简单的构造方法（filterWithName:）并通过迭代现有字典的键来填写值。它只需要几行代码。

您可以像这样使用字典：

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

 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]];