NSArray 排序

转：NSArray 内容排序

 

    //1. 数字型字符串
    NSArray *originalArray = @[@"1",@"21",@"12",@"11",@"0"];
    
    //block比较方法，数组中可以是NSInteger，NSString（需要转换）
    NSComparator finderSort = ^(id string1,id string2){
        if ([string1 integerValue] > [string2 integerValue]) {
            return (NSComparisonResult)NSOrderedDescending;
        }else if ([string1 integerValue] < [string2 integerValue]){
            return (NSComparisonResult)NSOrderedAscending;
        }
        else
            return (NSComparisonResult)NSOrderedSame;
    };
    
    //数组排序：
    NSArray *resultArray = [originalArray sortedArrayUsingComparator:finderSort];
    NSLog(@"第一种排序结果：%@",resultArray);
    
    
    //2. 非数字型字符串
    NSArray *charArray = @[@"string 1",@"String 21",@"string 12",@"String 11",@"String 02"];
    NSStringCompareOptions comparisonOptions = NSCaseInsensitiveSearch|NSNumericSearch|
    NSWidthInsensitiveSearch|NSForcedOrderingSearch;
    NSComparator sort = ^(NSString *obj1,NSString *obj2){
        NSRange range = NSMakeRange(0,obj1.length);
        return [obj1 compare:obj2 options:comparisonOptions range:range];
    };
    NSArray *resultArray2 = [charArray sortedArrayUsingComparator:sort];
    NSLog(@"字符串数组排序结果%@",resultArray2);
    
    // 3字典对象
    NSMutableArray *array = [NSMutableArray arrayWithObjects:
                             [NSDictionary dictionaryWithObjectsAndKeys:@"Obj0", [NSNumber numberWithInt:0], nil],
                             [NSDictionary dictionaryWithObjectsAndKeys:@"Obj5", [NSNumber numberWithInt:5], nil],
                             [NSDictionary dictionaryWithObjectsAndKeys:@"Obj2", [NSNumber numberWithInt:2], nil],
                             [NSDictionary dictionaryWithObjectsAndKeys:@"Obj3", [NSNumber numberWithInt:3], nil],
                             [NSDictionary dictionaryWithObjectsAndKeys:@"Obj1", [NSNumber numberWithInt:1], nil],
                             [NSDictionary dictionaryWithObjectsAndKeys:@"Obj4", [NSNumber numberWithInt:4], nil], nil];
    
    NSArray *resultArray = [array sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {
        NSNumber *number1 = [[obj1 allKeys] objectAtIndex:0];
        NSNumber *number2 = [[obj2 allKeys] objectAtIndex:0];
        NSComparisonResult result = [number1 compare:number2];
        
        //return result == NSOrderedAscending;  // 降序
        return result == NSOrderedDescending; // 升序
    }];
    NSLog(@"OrderedDescending:%@", resultArray);

    //4.自定义对象
    Person *person1 = [[Person alloc] init];
    [person1 setName:@"ABCD"];
    [person1 setAge:24];
    
    Person *person2 = [[Person alloc] init];
    [person2 setName:@"ACBD"];
    [person2 setAge:22];
    
    Person *person3 = [[Person alloc] init];
    [person3 setName:@"ABDC"];
    [person3 setAge:33];
    
    Person *person4 = [[Person alloc] init];
    [person4 setName:@"ACDB"];
    [person4 setAge:22];
    
    NSMutableArray *array = [NSMutableArray arrayWithObjects:person1, person3, person4, person2, nil];
    NSSortDescriptor *sortDescriptor1 = [NSSortDescriptor sortDescriptorWithKey:@"age" ascending:YES];  //先按照age排序,
    NSSortDescriptor *sortDescriptor2 = [NSSortDescriptor sortDescriptorWithKey:@"name" ascending:YES];  //如果age相同, 按照name排序,以此类推

    NSArray *tempArray = [array sortedArrayUsingDescriptors:[NSArray arrayWithObjects:sortDescriptor1, sortDescriptor2, nil]];
    
    for(NSInteger i = 0; i < [tempArray count]; i++){
        NSLog(@"%@--------%d\n", [[tempArray objectAtIndex:i] name], [[tempArray objectAtIndex:i] age]);
    }

 

#import <Foundation/Foundation.h>

@interface Person : NSObject

@property (nonatomic, strong) NSString *name;

@property (nonatomic, assign) NSInteger age;

@end

#import "Person.h"

@implementation Person

@synthesize name;
@synthesize age;

@end