根據實體類的屬性進行排序，這個屬性排序還可以增加幾個排序規則，前后的規則先判斷，如果一樣的則根據第二個排序規則來判斷
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"data" ascending:YES];//其中，price為數組中的對象的屬性，這個針對數組中存放對象比較更簡潔方便 NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:&sortDescriptor count:1]; [self.dataArray sortUsingDescriptors:sortDescriptors];
過濾不會對原來的數據產生影響，而是生成符合過濾條件的NSArray數據
NSPredicate *apredicate=[NSPredicate predicateWithFormat:@"id>=%ld AND id<=%ld",3,5]; NSArray *newArr=[self.dataArray filteredArrayUsingPredicate:apredicate];
下面是個例子可以運行看看
#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為數組中的對象的屬性，這個針對數組中存放對象比較更簡潔方便 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NSMutableArray進行排序和過濾的實例就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持VEVB武林網。
新聞熱點
疑難解答
