ios - NSDictionaryの値と整数値が同じであることを確認するにはどうすればよいですか？

Question

写真のような値の辞書があり、本IDの整数値があります。bookidが一致するかどうかを確認するにはどうすればよいですか？

これは私のチェックコードです

NSMutableDictionary *plistdictionary = [[NSMutableDictionary alloc]initWithContentsOfFile:metaDataPath];
NSMutableArray *notes=[plistdictionary objectForKey:@"usernotes"];
NSLog(@"notes value %@",notes);
NSArray *CollectingBookid=[[NSArray alloc]init];
CollectingBookid=[notes valueForKey:@"bookid"];
NSArray *CollectingPages=[[NSArray alloc]init];
CollectingPages=[notes valueForKey:@"pagenumber"];
NSArray *CollectingNotes=[[NSArray alloc]init];
CollectingNotes=[notes valueForKey:@"notes"];
NSLog(@"collection of book id%@",CollectingBookid);
NSString *bookid=@"95";
NSString *page=@"1";
int c=[CollectingBookid count];
for(int i=0;i<c;i++)
{
    NSString *singleBookids=[CollectingBookid objectAtIndex:i];
    NSString *singlePage=[CollectingPages objectAtIndex:i];
    if([singleBookids isEqualToString:bookid])
        {
            if([singlePage isEqualToString:page])
            {
                NSMutableArray *CompleteUserNotes=[[NSMutableArray alloc]init];
                CompleteUserNotes=[CollectingNotes objectAtIndex:i];
                NSLog(@"Selected Notes%@",CompleteUserNotes);
            }
        }
}

Answer 1

述語を作成し、配列をフィルタリングしてuserNoteを見つけます

/*As your plist has bookId as string its taken as string. 
But if you have bookId as integer before checking 
convert it to string for predicate to work*/
NSInteger bookId = 92;
NSString *bookIdString = [NSString stringWithFormat:@"%d",bookId];

NSInteger pageNumber = 12;
NSString *pageNumberString = [NSString stringWithFormat:@"%d",pageNumber];

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"bookid == %@ AND pagenumber == %@",bookIdString,pageNumberString];

//filteredUserNotes will have all notes matching bookId
NSArray *filteredUserNotes =  [notes filteredArrayUsingPredicate:predicate];

//Assuming you only has one entry for bookId and you want a single one
NSDictionary *userNote = [filteredUserNotes lastObject];

Answer 2

文字列ギ酸塩を使用して正しい比較を行っています。

整数と比較したい場合は、以下のコードを使用してください。

int bookid=95;
int page=1;
int c=[CollectingBookid count];
for(int i=0;i<c;i++)
{
    NSString *singleBookids=[CollectingBookid objectAtIndex:i];
    NSString *singlePage=[CollectingPages objectAtIndex:i];
    if([singleBookids intValue]==bookid)
    { 
        if([singlePage intValue]==page)
        {
            NSMutableArray *CompleteUserNotes=[[NSMutableArray alloc]init];
            CompleteUserNotes=[CollectingNotes objectAtIndex:i];
            NSLog(@"Selected Notes%@",CompleteUserNotes);
        }
    }
}

Answer 3

私はこれをメモ帳で書いています。エラーの可能性があります。

 NSMutableDictionary *plistdictionary = [[NSMutableDictionary alloc]initWithContentsOfFile:metaDataPath];
NSMutableArray *notes=[plistdictionary objectForKey:@"usernotes"];
int bookid = 95;
int page = 1;
for (NSDictionary *collectingObject in notes)
{
    int collectingBookid = [[collectingObject objectForKey:@"bookid"] intValue];
    int collectingPageid = [[collectingObject objectForKey:@"pagenumber"] intValue];
    if (collectingBookid == bookid && collectingPageid == page)
    {
        NSString *collectingNote = [collectingObject objectForKey:@"notes"];
        NSLog(@"Note is: %@", collectingNote);
    }
}

Answer 4

これを使用して整数値を比較できます

[singleBookids intValue]==[bookid intValue];