【Foundation-10-3】#import <Foundation/NSArray.h>排序

最新推荐文章于 2023-12-05 20:34:03 发布

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最新推荐文章于 2023-12-05 20:34:03 发布

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本文链接：https://blog.youkuaiyun.com/u013059266/article/details/49078269

本文介绍Objective-C中自定义排序的方法及实现，包括使用不同函数和选择器进行排序的具体实例。

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自定义的排序

@property (readonly, copy) NSData *sortedArrayHint;

- (NSArray *)sortedArrayUsingFunction:(NSInteger (*)(id, id, void *))comparator context:(void *)context;

- (NSArray *)sortedArrayUsingFunction:(NSInteger (*)(id, id, void *))comparator context:(void *)context hint:(NSData *)hint;

- (NSArray *)sortedArrayUsingSelector:(SEL)comparator;

    arr1 = @[@"1",@"2",@"3",@"4",@"2"];

    //获取 data 用于下面的自定义排序
    NSData *data1 = [arr1 sortedArrayHint];
    //排序，自定义排序规则，
    //    NSArray *arr3 = [arr1 sortedArrayUsingFunction:<#(NSInteger (*)(__strong id, __strong id, void *))#> context:<#(void *)#>]
    //    NSArray *arr4 = arr1 sortedArrayUsingFunction:<#(NSInteger (*)(__strong id, __strong id, void *))#> context:<#(void *)#> hint:<#(NSData *)#>
    //    NSArray *arr5 = [arr1 sortedArrayUsingSelector:@selector(paixu:)];

- (NSArray *)sortedArrayUsingComparator:(NSComparator)cmptr NS_AVAILABLE(10_6, 4_0);

- (NSArray *)sortedArrayWithOptions:(NSSortOptions)opts usingComparator:(NSComparator)cmptr NS_AVAILABLE(10_6, 4_0);

    
    arr1 = @[@"1",@"2",@"3",@"4",@"2"];

    //简单粗暴
    NSArray *arr6 = [arr1 sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {
        NSComparisonResult result = [obj1 compare:obj2];
        
        if (result == NSOrderedDescending) {
            return YES;
        }else{
            return NO;
        }
//        return result == NSOrderedDescending;//升序,一个比一个大
    }];
    /*
     NSOrderedAscending = -1L,  //降
     NSOrderedSame,             //一致
     NSOrderedDescending;       //升
     */
    
    NSLog(@"%@",arr6);
    
    
    
    NSArray *arr7 = [arr6 sortedArrayWithOptions:NSSortStable usingComparator:^NSComparisonResult(id obj1, id obj2) {
        NSComparisonResult result = [obj1 compare:obj2];
        return result == NSOrderedDescending;//升序
    }];
    /*
     NSSortConcurrent = (1UL << 0),并发
     NSSortStable = (1UL << 4),稳定
     */