OC之谓词

最新推荐文章于 2020-06-18 16:04:20 发布

原创最新推荐文章于 2020-06-18 16:04:20 发布 · 1.1k 阅读

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#OC #谓词

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//
//  main.m
//  谓词
//
//  Created by New-World on 13-11-6.
//  Copyright (c) 2013年 Gary. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Person.h"
int main(int argc, const char * argv[])
{

    @autoreleasepool {
        NSMutableArray *array=[NSMutableArray array];
        for (int i=0; i<10; i++) {
            Person *person=[[Person alloc]init];
            if (i<5) {
                person.name=[NSString stringWithFormat:@"jack-%d",i];
            }
            else{
                person.name=[NSString stringWithFormat:@"tom-%d",i];
            }
            NSNumber *a=[person age];
            int s=[a intValue];
            [person setAge:@(i+s)];
            [array addObject:person];
            [person release];
        }
            
            
            
            
        //判断是否满足条件
        //NSArray *inArray=@[@"tom-8",@"jack-3",@"jack-2"];
        //NSPredicate *predicate=[NSPredicate predicateWithFormat:@"age<25"];
        //NSPredicate *predicate=[NSPredicate predicateWithFormat:@"name in %@",inArray];//名字是否在数组inArray中
        //NSPredicate *predicate=[NSPredicate predicateWithFormat:@"name BEGINSWITH 't'|| name BEGINSWITH 'j'"];//是否以‘t’或者'j'开头
        //NSPredicate *predicate=[NSPredicate predicateWithFormat:@"name ENDSWITH '-5'"];//是否以‘-5’结尾
        NSPredicate *predicate=[NSPredicate predicateWithFormat:@"name like '*4'"];//是否以‘4’结尾
        for (Person *p in array) {
            BOOL ret=[predicate evaluateWithObject:p];
            if (ret) {
                NSLog(@"%@",p);
            }
        
        }
        
        //对数组进行过滤
        NSArray *filterArray=[array filteredArrayUsingPredicate:predicate];
        NSLog(@"%@",filterArray);
        
    }
    return 0;
}