ios字符串截取/数据存入数组

 

#import <Foundation/Foundation.h>

 

int main(int argc, const char * argv[]) {

    @autoreleasepool {

//1.对字符串“2015-09-01 08:19:10”操作，输出"08:19:10"。要求使用两种截取方式。

        //第一个

        NSString *str=@"2015-09-01 08:19:10";

        NSRange range1=[str rangeOfString:@"08:19:10"];

        NSString *subStr=[str substringWithRange:range1];

        NSLog(@"第一题－－－－－－－（1）");

        NSLog(@"%@",subStr);

        NSString *substr1=[str substringFromIndex:range1.location];

        NSLog(@"第一题－－－－－－－(2)");

        NSLog(@"%@",substr1);

        

        

        

        

/*2.数组中存取以下数据:

  @[@{@"name":@"陈丰",@"age":@"32"},

    @{@"name":@"孙明",@"age":@"24"},

    @{@"name":@"王明",@"age":@"12"},

    @{@"name":@"李西",@"age":@"50"}

   ]

     1)按年龄进行排序(降序)，输出数据

     2）删除“陈丰”并输出数据

 */

        

        NSDictionary *dic1=@{@"name":@"陈丰",@"age":@"32"};

        NSDictionary *dic2=@{@"name":@"孙明",@"age":@"24"};

        NSDictionary *dic3=@{@"name":@"王明",@"age":@"12"};

        NSDictionary *dic4=@{@"name":@"李西",@"age":@"50"};

        NSMutableArray *arr=[[NSMutableArray alloc]initWithObjects:dic1,dic2,dic3,dic4,nil];

        NSSortDescriptor *sorts=[[NSSortDescriptor alloc]initWithKey:@"age" ascending:YES];

        [arr sortUsingDescriptors:[NSArray arrayWithObjects:sorts, nil]];

        NSLog(@"第二题－－－－－－－（1）");

        NSLog(@"排序后－－－－－－－(升序)");

        for(NSDictionary *dic in arr){

 

            NSLog(@"%@,%@",[dic objectForKey:@"name"],[dic objectForKey:@"age"]);

        }

        NSLog(@"排序后－－－－－－－(降序)");

        NSSortDescriptor *sorts1=[[NSSortDescriptor alloc]initWithKey:@"age" ascending:NO];

        [arr sortUsingDescriptors:[NSArray arrayWithObjects:sorts1, nil]];

        for(NSDictionary *dic in arr){

            NSLog(@"%@ %@",dic[@"name"],dic[@"age"]);

        }

        NSLog(@"第二题－－－－－－－（2）");

        for(int i=0;i<[arr count];i++){

            NSDictionary *dic=arr[i];

            if([dic[@"name"] isEqual:@"陈丰"]){

                [arr removeObject:dic];

            }

        }

        for(NSDictionary *dic in arr){

            NSLog(@"%@ %@",dic[@"name"],dic[@"age"]);

        }

    

        

    }

    return 0;

}