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iOS 对NSMutableArray进行排序和过滤的实例

2023-09-17 22:12:06 66

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

NSSortDescriptor*sortDescriptor=[[NSSortDescriptoralloc]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=[[NSArrayalloc]initWithObjects:&sortDescriptorcount:1];
[self.dataArraysortUsingDescriptors: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

NSPredicate*apredicate=[NSPredicatepredicateWithFormat:@"id>=%ldANDid<=%ld",3,5];

NSArray*newArr=[self.dataArrayfilteredArrayUsingPredicate:apredicate];

下面是个例子可以运行看看

#import

@interfaceTestBean:NSObject
@property(nonatomic,assign)intid;
@property(nonatomic,strong)NSString*data;
@end

#import
@interfaceViewController:UIViewController
@property(strong,nonatomic)NSArray
*list;

@end

//
//ViewController.m
//First
//
//Createdbyshanreal-iOSon17/10/16.
//Copyright©2017年shanreal.LongZhenHao.Allrightsreserved.
//
#import"ViewController.h"
#import"TestBean.h"
@interfaceViewController()
@property(nonatomic,strong)NSMutableArray*dataArray;
@end
@implementationViewController
-(void)viewDidLoad{
[superviewDidLoad];
//Doanyadditionalsetupafterloadingtheview.
_dataArray=[NSMutableArrayarray];

TestBean*one=[[TestBeanalloc]init];
one.id=1;
one.data=@"one";
[_dataArrayaddObject:one];

one=[[TestBeanalloc]init];
one.id=2;
one.data=@"two";
[_dataArrayaddObject:one];

one=[[TestBeanalloc]init];
one.id=22;
one.data=@"two2";
[_dataArrayaddObject:one];

one=[[TestBeanalloc]init];
one.id=3;
one.data=@"three";
[_dataArrayaddObject:one];

one=[[TestBeanalloc]init];
one.id=4;
one.data=@"four";
[_dataArrayaddObject:one];



one=[[TestBeanalloc]init];
one.id=44;
one.data=@"four4";
[_dataArrayaddObject:one];

one=[[TestBeanalloc]init];
one.id=5;
one.data=@"five";
[_dataArrayaddObject:one];

one=[[TestBeanalloc]init];
one.id=6;
one.data=@"six";
[_dataArrayaddObject:one];

[selfoneClick];
[selftwoClick];

}
-(void)oneClick{
NSSortDescriptor*sortDescriptor=[[NSSortDescriptoralloc]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=[[NSArrayalloc]initWithObjects:&sortDescriptorcount:1];
[self.dataArraysortUsingDescriptors:sortDescriptors];

[selflogArray:self.dataArray];
}
-(void)twoClick{
NSPredicate*apredicate=[NSPredicatepredicateWithFormat:@"id>=%ldANDid<=%ld",3,5];

NSArray*newArr=[self.dataArrayfilteredArrayUsingPredicate:apredicate];
[selflogArray:newArr];
}
-(void)logArray:(NSArray*)array{
NSLog(@"---------------------------------");
for(TestBean*beaninarray){
NSLog(@"%d%@",bean.id,bean.data);
}
}

@end

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iOS 对NSMutableArray进行排序和过滤的实例

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