ObjectiveC предикаты, упрощенный метод

#define fi_start @"BEGINSWITH[cd]"
#define fi_end @"ENDSWITH[cd]"
#define fi_like @"LIKE[cd]"
#define fi_include @"CONTAINS[cd]"
#define fi_regular @"MATCHES[cd]"
 
#define fs_start @"BEGINSWITH"
#define fs_end @"ENDSWITH"
#define fs_like @"LIKE"
#define fs_include @"CONTAINS"
#define fs_regular @"MATCHES"

// упрощенные предикаты
// FreeSoft 2013
 
#define fi_start @"BEGINSWITH[cd]"
#define fi_end @"ENDSWITH[cd]"
#define fi_like @"LIKE[cd]"
#define fi_include @"CONTAINS[cd]"
#define fi_regular @"MATCHES[cd]"
 
#define fs_start @"BEGINSWITH"
#define fs_end @"ENDSWITH"
#define fs_like @"LIKE"
#define fs_include @"CONTAINS"
#define fs_regular @"MATCHES"
 
#import <Foundation/Foundation.h>
 
@interface NSString (NSString_SimplePredicate)
 
-(bool) predicateMatch:(NSString*) filter
                value: (id) value;
 
@end
 
@interface NSArray (NSArray_SimplePredicate)
 
-(NSArray*) predicateFilter: (NSString*) filter
                      value: (id) value;
 
@end

// упрощенные предикаты
 
 
#import "SimplePredicate.h"
 
@implementation NSString (NSString_SimplePredicate)
 
 
-(bool) predicateMatch:(NSString*) filter
                 value: (id) value {
    // функция сравнения строк через выражения
    NSString *p1 = [NSString stringWithFormat:@"SELF %@ %%@",filter];
    NSPredicate *regexp = nil;
    if (value) {
        regexp = [NSPredicate predicateWithFormat:p1,value];
    }
    return [regexp evaluateWithObject:self];
}
 
@end
 
@implementation NSArray (NSArray_SimplePredicate)
 
-(NSArray*) predicateFilter: (NSString*) filter
                      value: (id) value {
    // функция фильтрации массивов
    NSString *p1 = [NSString stringWithFormat:@"SELF %@ %%@",filter];
    NSPredicate *regexp = nil;
    if (value) {
        regexp = [NSPredicate predicateWithFormat:p1,value];
    }
    return [self filteredArrayUsingPredicate:regexp];
}
 
@end

 NSString* s = @"Helo world";
    
    bool ok = [s predicateMatch:fs_start value:@"Helo"];
    
    if (ok) {
        NSLog(@"есть совпадение");
    }

NSString* s = @"Helo world";
    
    bool ok = [s predicateMatch:fi_regular value:@"h\\w+\\s\\w+"];
 
   if (ok) {
        NSLog(@"есть совпадение");
    }

-(void) ShowMessage: (bool) ok {
    if (ok) {
        UIAlertView *a = [[UIAlertView alloc] initWithTitle:@"" message:@"Есть совпадение" delegate:nil cancelButtonTitle:@"ok" otherButtonTitles: nil];
        [a show];
    } else {
        UIAlertView *a = [[UIAlertView alloc] initWithTitle:@"" message:@"НЕТ совпадения" delegate:nil cancelButtonTitle:@"ok" otherButtonTitles: nil];
        [a show];
    }
}
 
-(void) ShowArray: (NSArray*) ar {
    NSString *sa = [ar componentsJoinedByString:@"\n"];
    UIAlertView *a = [[UIAlertView alloc] initWithTitle:@"" message:sa delegate:nil cancelButtonTitle:@"ok" otherButtonTitles: nil];
    [a show];
}
 
- (IBAction)btn_start:(id)sender {
    NSString* s = @"Helo world";
    
    bool ok = [s predicateMatch:fs_start value:@"Helo"];
    
    [self ShowMessage:ok];
    
}
 
- (IBAction)btn_include:(id)sender {
    NSString* s = @"Helo world";
    
    bool ok = [s predicateMatch:fs_include value:@"o worl"];
    
    [self ShowMessage:ok];
    
}
 
- (IBAction)btn_regular:(id)sender {
    NSString* s = @"Helo world";
    
    bool ok = [s predicateMatch:fi_regular value:@"h\\w+\\s\\w+"];
    
    [self ShowMessage:ok];
}
 
- (IBAction)btn_like:(id)sender {
    NSString* s = @"Helo world";
    
    bool ok = [s predicateMatch:fi_like value:@"Helo ??rld"];
    
    [self ShowMessage:ok];
 
}
 
- (IBAction)btn_filter:(id)sender {
    NSArray* array = [NSArray arrayWithObjects:@"hello",@"world",@"pen",@"dog",@"xOx", nil];
    
    NSArray* result = [array predicateFilter:fi_include value:@"o"];
    
    [self ShowArray:result];
    
}

    NSString* s = @"Helo world";
    NSPredicate* p = [NSPredicate predicateWithFormat:@"SELF CONTAINS[cd] %@", @"o worl"];
    if ([p evaluateWithObject:s]) {
        // совпадение
    }

NSString* s = @"Helo world";
if ([s evaluateString: @"o worl" withPredicate: @"CONTAINS[cd]"]) {
    // совпадение
}

if ([s evaluateUsingPredicateWithFormat: @"SELF CONTAINS[cd] %@", @"o worl"]) {
   // совпадение
}