Ios 如何使用两个NSPredcates筛选NSArray
我想筛选NSDictionary的NSArray,但是我想使用一个、两个甚至三个NSPredicate值筛选结果 目前,我正在通过执行此操作筛选阵列Ios 如何使用两个NSPredcates筛选NSArray,ios,nsstring,nsarray,nspredicate,Ios,Nsstring,Nsarray,Nspredicate,我想筛选NSDictionary的NSArray,但是我想使用一个、两个甚至三个NSPredicate值筛选结果 目前,我正在通过执行此操作筛选阵列 NSPredicate *predicateString = [NSPredicate predicateWithFormat:@"parts == %@", filterString];//keySelected is NSString itself NSMutableArray *filteredArray = [NSMutab
NSPredicate *predicateString = [NSPredicate predicateWithFormat:@"parts == %@", filterString];//keySelected is NSString itself
NSMutableArray *filteredArray = [NSMutableArray arrayWithArray:[currentParts filteredArrayUsingPredicate:predicateString]];
sortedItemsArray = [filteredArray mutableCopy];
但我不确定如何使用两个谓词来实现这一点
另外两个谓词分别类似于上面的谓词,它们接受不同的键
NSPredicate *predicateString = [NSPredicate predicateWithFormat:@"area == %@", filterString];
及
我想的是也许你可以
NSPredicate *predicateString = [NSPredicate predicateWithFormat:@"stage == %@ area == %@", filterString, areaflterstring];
但我认为这是不可能的。这是可能的,但您需要告诉谓词如何组合这些部分,如:
NSPredicate *predicateString = [NSPredicate predicateWithFormat:@"stage == %@ AND area == %@", filterString, areaflterstring];
您也可以使用
NSCompoundPredicate
组合许多谓词。相关:非常感谢。现在将研究NSCompoundPredicate:)
NSPredicate *predicateString = [NSPredicate predicateWithFormat:@"stage == %@ AND area == %@", filterString, areaflterstring];