iphone - 如何将数组中的多个值转换为以逗号分隔的字符串

Question

我试图使用componentSeparatedByString:@“，”将字符串插入具有多个值的数据库中。我正在获取“arrayp1net”中的所有值，但问题是如何制作一个包含以逗号(，)分隔的“arrayp1net”数组所有值的字符串？

if(p1h < 18)
{
    for(int k=0;k<[arrayp1 count];k++)
    {
        if([[hcar1 objectAtIndex:1]intValue] >= [[ar33 objectAtIndex:k] intValue])
        {
            NSString *str = [NSString stringWithFormat:@"%d",[[[arrayp1 objectAtIndex:k] text] intValue] -1];
            [arrayp1net addObject:str];        
           }
        else
        {
            NSString *str = [NSString stringWithFormat:@"%d",[[[arrayp1 objectAtIndex:k] text]intValue]];
            [arrayp1net addObject:str];
            player1netscore = [NSString stringWithFormat:@"%@",arrayp1net];
        }
    }

是的，我需要相同的内容，但我必须在数据库中将其插入查询的一列中，以便在我要提取时按原样提取所有内容。

query=[NSString stringWithFormat:@"insert into normalscoring  
(gameid,coursename,p1,p2,p3,p4,p1s,p2s,p3s,p4s,gameDate,p1nets,p2nets,p3nets,p4nets)  
 values (\'%@\',\'%@\',\'%@||%@\',\'%@||%@\',\'%@||%@\',\'%@||%@\',
 ',,,,,,,,,,,,,,,,,||0||0||0||0',
 ',,,,,,,,,,,,,,,,,||0||0||0||0',
 ',,,,,,,,,,,,,,,,,||0||0||0||0',
 ',,,,,,,,,,,,,,,,,||0||0||0||0',
  \'%@\',',,,,,,,,,,,,,,,,,',
 ',,,,,,,,,,,,,,,,,',',,,,,,,,,,,,,,,,,',',,,,,,,,,,,,,,,,,')",
 txtgameid.text,txtcoursename.text,txtplayer1.text,player1handicap,
 txtplayer2.text,player2handicap,txtplayer3.text,player3handicap,
txtplayer4.text,player4handicap,txtdate.text];

这是我在if语句后尝试做的但是得到异常的东西

player1netscore = [NSString stringWithFormat:@"%@",arrayp1net];
arn11=[player1netscore componentsSeparatedByString:@","];
player1netscore=[[arn11 objectAtIndex:0] objectForKey:@"p1nets"];
NSLog(@"player1netscore...%@",player1netscore);

Answer 1

使用 -[NSArray componentsJoinedByString:] :

NSString *stringp1net = [arrayp1net componentsJoinedByString:@","];