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  • 集合对象(NSSet)

    main.m

    #import <Foundation/Foundation.h>
    @interface NSSet(printInteger)
    -(void)printSet;
    
    @end
    @implementation NSSet(printInteger)
    
    -(void)printSet
    {
        for (NSNumber *integer in self) {
            printf("%i",[integer integerValue]);
        }
        printf("
    ");
    }
    
    @end
    
    
    
    int main(void)
    {
        @autoreleasepool {
            NSMutableSet *set1=[NSMutableSet setWithObjects:[NSNumber numberWithInteger:1],
                                [NSNumber numberWithInteger:3],
                                [NSNumber numberWithInteger:5], nil];
            NSMutableSet *set2=[NSMutableSet setWithObjects:[NSNumber numberWithInteger:2],
                                [NSNumber numberWithInteger:4],
                                [NSNumber numberWithInteger:6], nil];
            if ([set1 isEqualToSet:set2]==YES) {
                NSLog(@"set1=set2");
            }else{
                NSLog(@"set1!=set2");
            }
        if ([set1 containsObject:[NSNumber numberWithInteger:3]]==YES) {
            NSLog(@"set1 included 3");
        }else{
            NSLog(@"set1 not included 3");
        }
        
        [set1 printSet];
        [set1 addObject:[NSNumber numberWithInteger:6]];
        [set1 removeObject:[NSNumber numberWithInteger:1]];
        [set1 printSet];
        [set1 intersectSet:set2];
        [set1 printSet];
        
        [set1 intersectSet:set2];
        [set1 printSet];
        [set1 unionSet:set2];
        [set1 printSet];
        }
        return 0;
    }
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  • 原文地址:https://www.cnblogs.com/wangwenfei/p/nsset.html
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