iphone - 如何修改 NSMutableArray 属性？

Question

我使用 2 个 sqlite 数据库文件。

1) 填充来自 sqlite 数据库的项目。

@property (nonatomic, strong) NSMutableArray *items;  

.......

FMResultSet *results = [db1 executeQuery:query];

    while ([results next]) {

        Book *book = [[Book alloc] init];

        book.content = [results stringForColumn:@"Zcontent"];
        book.title   = [results stringForColumn:@"Ztitle"];
        book.idx     = [results intForColumn:@"Zidx"];

        book.highlight_YN  = NO;

        [items addObject:book];
        [book release];
    }

2) 然后，从其他-B- sqlite 数据库中选择项目。

FMDatabase *userDB = [FMDatabase databaseWithPath:userfmdbPath];  
NSString *query2 = [NSString stringWithFormat:@"SELECT zidx, highlight_YN FROM zHighlight where zbook = %d and zchapter = %d order by zidx ", pBook,pChapter];

FMResultSet *userresults = [userDB executeQuery:query2]; 

3) 问题:我想修改具有 userresults 结果与 results 相比的项目的属性 (highlight_YN) - zidx 。

如何修改 NSMutableArray 属性？

Answer 1

您可以循环遍历 items 数组并搜索对象。

    for ( Book *book in items ) {
        if( book.idx == [userresults intForColumn:@"zidx"] )
        {
            book.highlight_YN = [userresults boolForColumn:@"highlight_YN"];
            break;
        }
    }