[示例]NSDictionary编程题-字典的排序应用(iOS6班)

代码：

#import <Foundation/Foundation.h>

static NSString * const kName = @"name";
static NSString * const kAge = @"age";
static NSString * const kGender = @"gender";

inline static NSMutableDictionary *CreateDict(NSString *name, NSInteger age,  BOOL isMale){
    NSMutableDictionary *dict = [[NSMutableDictionary alloc] initWithDictionary:@{kName:name,kAge :@(age),kGender :@(isMale)}];
    return dict;
}

NSString *maleFemale(id sex){
    if([sex isEqual:@YES]){
        return @"男性";
    }
    else{
        return @"女性";
    }
}

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        NSArray *array = @[CreateDict(@"王思聪", , YES),
                           CreateDict(@"范冰冰", , NO),
                           CreateDict(@"马云", , YES),
                           CreateDict(@"霍建华", , YES),
                           CreateDict(@"赵丽颖", , NO)];
        //第1题 请按照年龄的升序排序输出，输出样式为：王思聪，男性，今年27岁
        NSSortDescriptor *sortWithAge=[[NSSortDescriptor alloc]initWithKey:kAge ascending:YES];
        NSArray *eleSort=[NSArray arrayWithObjects:sortWithAge,nil];
        NSArray *sortArr=[array sortedArrayUsingDescriptors:eleSort];
        for(NSDictionary *dic in sortArr){
            NSLog(@"%@,%@,今年%@岁",dic[@"name"],maleFemale(dic[kGender]),dic[@"age"]);
        }
        //第2题 请输入女性信息，输出样式为：范冰冰大美女，今年35岁
        for(NSDictionary *dic1 in sortArr){
            if([dic1[kGender] isEqual:@NO]){
                NSLog(@"%@大美女，今年%@岁",dic1[kName],dic1[kAge]);
            }
        }
        //第3题 请将“马云”的年龄改为41岁
        NSMutableArray *mutArr=[NSMutableArray arrayWithArray:array];
        for(NSDictionary *dic in mutArr) {
            if([dic[kName] isEqualToString:@"马云"]){
                [dic setValue:@"" forKey:kAge];
            }
        }
        for(NSDictionary *dic2 in sortArr){
                NSLog(@"%@,%@,%@",dic2[kName],maleFemale(dic2[kGender]),dic2[kAge]);
        }
    }
    return ;
}