我有以下方法：
- (NSMutableArray *)getFilteredArrayFromArray:(NSMutableArray *)array withText:(NSString *)text {
if ([array count] <= 0)
return nil;
NSMutableArray *arrayToFilter = [NSMutableArray arrayWithArray:array];
NSString *nameformatString = [NSString stringWithFormat:@"stationName contains[c] '%@'",text];
NSPredicate *namePredicate = [NSPredicate predicateWithFormat:nameformatString];
NSString *descformatString = [NSString stringWithFormat:@"stationTagline contains[c] '%@'",text];
NSPredicate *descPredicate = [NSPredicate predicateWithFormat:descformatString];
NSString *aToZformatString = [NSString stringWithFormat:@"stationSearchData.browseAtozArray.city contains[c] '%@'",text];
NSPredicate *aToZPredicate = [NSPredicate predicateWithFormat:aToZformatString];
NSPredicate * combinePredicate = [NSCompoundPredicate orPredicateWithSubpredicates:[NSArray arrayWithObjects:namePredicate,descPredicate,aToZPredicate,nil]];
[arrayToFilter filterUsingPredicate:combinePredicate];
return arrayToFilter;
}
前2个谓词工作正常.但最后一个(aToZPredicate),不工作. stationSearchData是一个StationSearchData对象,而browseAtozArray是一个NSMutableArray.
我如何使用谓词来在数组中的数组中基本上搜索数组？
这是StationSearchData对象的界面：
@interface StationSearchData : NSObject @property (nonatomic,strong) NSString *location; @property (nonatomic,strong) NSString *city; @property (nonatomic,strong) NSString *latitude; @property (nonatomic,strong) NSString *longitude; @property (nonatomic,strong) NSMutableArray *browseAtozArray; @property (nonatomic,strong) NSMutableArray *genreArray; @end
谢谢！
解决方法
首先,你不应该使用stringWithFormat来构建谓词.这可能导致
问题如果搜索文本包含任何特殊字符,如“或”.
所以你应该更换
问题如果搜索文本包含任何特殊字符,如“或”.
所以你应该更换
NSString *nameformatString = [NSString stringWithFormat:@"stationName contains[c] '%@'",text]; NSPredicate *namePredicate = [NSPredicate predicateWithFormat:nameformatString];
通过
NSPredicate *namePredicate = [NSPredicate predicateWithFormat:@"stationName contains[c] %@",text];
要在数组中搜索,您必须在谓词中使用“ANY”：
NSPredicate *aToZPredicate = [NSPredicate predicateWithFormat:@"ANY stationSearchData.browseAtozArray.city CONTAINS[c] %@",text];
