zoukankan      html  css  js  c++  java
  • iOS简单排序--字母排序、NSDictionary排序

    // 数组用系统方法compare做字母的简单排序

        NSArray *oldArray = @[@"bac",@"bzd",@"azc",@"azz"];

      NSArray *newArray = [oldArray sortedArrayUsingSelector:@selector(compare:)];

        NSLog(@"new array = %@",newArray);

        

    // 因为NSDictionary排序

        NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];

        [dict setObject:@"1" forKey:@"key1"];

        [dict setObject:@"2" forKey:@"key2"];

        [dict setObject:@"3" forKey:@"key3"];

        [dict setObject:@"4" forKey:@"key4"];

        

       for (NSString *str in [dict allKeys]) {

           NSLog(@"key == %@",str);

        }

        

       NSArray *keys = [dict allKeys];

       NSArray *sortedArray = [keys sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2){

            return [obj1 compare:obj2 options:NSNumericSearch];

        }];

        

       for (NSString *categoryId in sortedArray) {

            NSLog(@"[dict objectForKey:categoryId] === %@",[dict objectForKey:categoryId]);

        }

  • 相关阅读:
    java_hibernate 框架4
    java_hibernate 框架3
    java 基础 动态代理
    java_hibernate 框架2
    nginx配置反向代理实现负载均衡 小记
    mysql报错2059
    docker安装php容器小记
    docker安装nginx容器小记
    linux php添加pdo_mysql扩展
    linux php添加openssl扩展
  • 原文地址:https://www.cnblogs.com/NSong/p/5372002.html
Copyright © 2011-2022 走看看