我正在使用此[CIFilter filterNamesInCategories:nil]
获取可用过滤器列表,但如何获取类别列表?我当然可以通过过滤器列表进行枚举,并读取每个过滤器中的类别来构建一个集合,但是有更好的方法吗?
答案 0 :(得分:1)
我是这样做的:
NSMutableSet * categories = [NSMutableSet set];
for (NSString* filterName in [CIFilter filterNamesInCategories:nil])
{
for (id value in [[[CIFilter filterWithName:filterName] attributes]
valueForKey:@"CIAttributeFilterCategories"]) {
[categories addObject:value];
}
}
NSLog(@"%@", categories);
答案 1 :(得分:1)
Swift 4.2版本在这里。
import CoreImage
var results = NSMutableSet()
let categories = CIFilter.filterNames(inCategory: nil)
for category in categories {
let attributes = CIFilter(name: category)?.attributes
let filterCategories = attributes!["CIAttributeFilterCategories"]
results.addObjects(from: filterCategories as! [Any])
}
print(results)
答案 2 :(得分:0)
过滤类别键
过滤器类别。
extern NSString *kCICategoryDistortionEffect;
extern NSString *kCICategoryGeometryAdjustment;
extern NSString *kCICategoryCompositeOperation;
extern NSString *kCICategoryHalftoneEffect;
extern NSString *kCICategoryColorAdjustment;
extern NSString *kCICategoryColorEffect;
extern NSString *kCICategoryTransition;
extern NSString *kCICategoryTileEffect;
extern NSString *kCICategoryGenerator;
extern NSString *kCICategoryReduction;
extern NSString *kCICategoryGradient;
extern NSString *kCICategoryStylize;
extern NSString *kCICategorySharpen;
extern NSString *kCICategoryBlur;
extern NSString *kCICategoryVideo;
extern NSString *kCICategoryStillImage;
extern NSString *kCICategoryInterlaced;
extern NSString *kCICategoryNonSquarePixels;
extern NSString *kCICategoryHighDynamicRange ;
extern NSString *kCICategoryBuiltIn;
至于在运行时获取它们,除了枚举它们之外,我没有看到任何其他选项。 Here is the answer to that