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iOS 對(duì)NSMutableArray進(jìn)行排序和過濾的實(shí)例

發(fā)布時(shí)間:2020-10-18 17:51:14 來源:腳本之家 閱讀:115 作者:鍵盤舞者113 欄目:移動(dòng)開發(fā)

根據(jù)實(shí)體類的屬性進(jìn)行排序,這個(gè)屬性排序還可以增加幾個(gè)排序規(guī)則,前后的規(guī)則先判斷,如果一樣的則根據(jù)第二個(gè)排序規(guī)則來判斷

NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"data" ascending:YES];//其中,price為數(shù)組中的對(duì)象的屬性,這個(gè)針對(duì)數(shù)組中存放對(duì)象比較更簡潔方便 
NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:&sortDescriptor count:1]; 
[self.dataArray sortUsingDescriptors:sortDescriptors]; 

過濾不會(huì)對(duì)原來的數(shù)據(jù)產(chǎn)生影響,而是生成符合過濾條件的NSArray數(shù)據(jù)

NSPredicate *apredicate=[NSPredicate predicateWithFormat:@"id>=%ld AND id<=%ld",3,5]; 
 
NSArray *newArr=[self.dataArray filteredArrayUsingPredicate:apredicate];

下面是個(gè)例子可以運(yùn)行看看

#import <Foundation/Foundation.h> 
 
@interface TestBean : NSObject 
@property(nonatomic,assign)int id; 
@property(nonatomic,strong)NSString* data; 
@end 
#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為數(shù)組中的對(duì)象的屬性,這個(gè)針對(duì)數(shù)組中存放對(duì)象比較更簡潔方便
 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

以上這篇iOS 對(duì)NSMutableArray進(jìn)行排序和過濾的實(shí)例就是小編分享給大家的全部內(nèi)容了,希望能給大家一個(gè)參考,也希望大家多多支持億速云。

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