根据实体类的属性进行排序，这个属性排序还可以增加几个排序规则，前后的规则先判断，如果一样的则根据第二个排序规则来判断
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NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"data" ascending:YES];//其中，price为数组中的对象的属性，这个针对数组中存放对象比较更简洁方便 NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:&sortDescriptor count:1]; [self.dataArray sortUsingDescriptors:sortDescriptors]; |
过滤不会对原来的数据产生影响，而是生成符合过滤条件的NSArray数据
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NSPredicate *apredicate=[NSPredicate predicateWithFormat:@"id>=%ld AND id<=%ld",3,5]; NSArray *newArr=[self.dataArray filteredArrayUsingPredicate:apredicate]; |
下面是个例子可以运行看看
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#import <Foundation/Foundation.h> @interface TestBean : NSObject @property(nonatomic,assign)int id; @property(nonatomic,strong)NSString* data; @end |
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#import <UIKit/UIKit.h>@interface ViewController : UIViewController<UITableViewDelegate,UITableViewDataSource>@property (strong, nonatomic) NSArray*list;@end//// ViewController.m// First//// Created by shanreal-iOS on 17/10/16.// Copyright © 2017年 shanreal.LongZhenHao. All rights reserved.//#import "ViewController.h"#import "TestBean.h"@interface ViewController ()@property(nonatomic,strong)NSMutableArray* dataArray;@end@implementation ViewController- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. _dataArray = [NSMutableArray array]; TestBean* one = [[TestBean alloc]init]; one.id = 1; one.data = @"one"; [_dataArray addObject:one]; one = [[TestBean alloc]init]; one.id = 2; one.data = @"two"; [_dataArray addObject:one]; one = [[TestBean alloc]init]; one.id = 22; one.data = @"two2"; [_dataArray addObject:one]; one = [[TestBean alloc]init]; one.id = 3; one.data = @"three"; [_dataArray addObject:one]; one = [[TestBean alloc]init]; one.id = 4; one.data = @"four"; [_dataArray addObject:one]; one = [[TestBean alloc]init]; one.id = 44; one.data = @"four4"; [_dataArray addObject:one]; one = [[TestBean alloc]init]; one.id = 5; one.data = @"five"; [_dataArray addObject:one]; one = [[TestBean alloc]init]; one.id = 6; one.data = @"six"; [_dataArray addObject:one]; [self oneClick]; [self twoClick]; }-(void)oneClick{ NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"data" ascending:YES];//其中，price为数组中的对象的属性，这个针对数组中存放对象比较更简洁方便 NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:&sortDescriptor count:1]; [self.dataArray sortUsingDescriptors:sortDescriptors]; [self logArray:self.dataArray];}-(void)twoClick{ NSPredicate *apredicate=[NSPredicate predicateWithFormat:@"id>=%ld AND id<=%ld",3,5]; NSArray *newArr=[self.dataArray filteredArrayUsingPredicate:apredicate]; [self logArray:newArr];}-(void)logArray:(NSArray*)array{ NSLog(@"---------------------------------"); for(TestBean* bean in array){ NSLog(@"%d %@",bean.id,bean.data); }}@end |
以上这篇iOS 对NSMutableArray进行排序和过滤的实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：http://blog.csdn.net/z979451341/article/details/79046205
