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;

}