NSArray *arr3=@[@"one",@"two",@"three"];

NSString *str=[arr3 componentsJoinedByString:@"-"];//把数组用--链接成字符串

NSLog(@"%@",str);//结果为：one-two-three

NSString *str2=@"abc-dfgg-sda";

NSArray *arr4=[str2 componentsSeparatedByString:@"-"];//把字符串分成字符数组

NSLog(@"%@",arr4);

//结果为{abc,

        dfgg,

        three

}

NSArray *arr3=@[@"one",@"two",@"three"];

NSString *str=[arr3 componentsJoinedByString:@"-"];//把数组用--链接成字符串

NSLog(@"%@",str);//结果为：one-two-three

NSString *str2=@"abc-dfgg-sda";

NSArray *arr4=[str2 componentsSeparatedByString:@"-"];//把字符串分成字符数组

NSLog(@"%@",arr4);

//结果为{abc,

        dfgg,

        three

}