#define NSLog(FORMAT, ...) printf("%s ", [[NSString stringWithFormat:FORMAT, ##__VA_ARGS__] UTF8String])
#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。
NSString *str=@"2015-09-01 08:19:10";
NSString *newstr1=[str substringFromIndex:11];
NSLog(@"%@",newstr1);
NSLog(@"-------------------");
NSRange rang;
rang.location=11;
rang.length=8;
NSString *newstr2=[str substringWithRange:rang];
NSLog(@"%@",newstr2);
NSLog(@"-------------------");
/*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
*/
// 1)按年龄进行排序(降序)，输出数据
NSArray *array = @[@{@"name":@"陈丰",@"age":@"32"},
@{@"name":@"孙明",@"age":@"24"},
@{@"name":@"王明",@"age":@"12"},
@{@"name":@"李西",@"age":@"50"}
];
NSSortDescriptor *p1=[NSSortDescriptor sortDescriptorWithKey:@"age" ascending:1];
NSArray *p=[array sortedArrayUsingDescriptors:[NSArray arrayWithObject:p1]];
for (NSDictionary *dic in p) {
NSLog(@"姓名:%@,年龄%@",dic[@"name"],dic[@"age"]);
}
NSLog(@"-------------------");
//2）删除“陈丰”并输出数据
NSSortDescriptor *p2=[NSSortDescriptor sortDescriptorWithKey:@"age" ascending:0];
NSArray *p3=[array sortedArrayUsingDescriptors:[NSArray arrayWithObject:p2]];
for (NSDictionary *dic in p3) {
if(![ [dic objectForKey:@"name"] isEqual:@"陈丰"]){
NSLog(@"姓名:%@,年龄%@",dic[@"name"],dic[@"age"]);
}
}
}
return 0;
}