在AppDelegate中我找回我的数据库的路径:未知错误而执行select语句
NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentDirectory=[paths objectAtIndex:0];
self.sqlFile=[[NSString alloc]init];
self.sqlFile=[documentDirectory stringByAppendingPathComponent:@"AnimalData.sqlite"];
在我的视图控制器之一,我必须从数据库中选择值,代码:
NSString *trimString=[appDelegate.mainBreedSelected stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSString *selectSQL=[NSString stringWithFormat:@"select breed from AnimalsTable where mainBreed=\"%@\"",trimString];
sqlite3_stmt *selectStatement;
const char *select_stmt=[selectSQL UTF8String];
if (sqlite3_open([appDelegate.sqlFile UTF8String],&database)==SQLITE_OK)
{
sqlite3_prepare_v2(database,select_stmt,-1,&selectStatement,NULL);
if (sqlite3_step(selectStatement)==SQLITE_DONE)
{
while(sqlite3_step(selectStatement) == SQLITE_ROW)
{
NSString *animalBreed = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectStatement, 2)];
NSLog(@"Breed:%@",animalBreed);
}
}
else
NSAssert1(0, @"Error while deleting. '%s'", sqlite3_errmsg(database));
sqlite3_finalize(selectStatement);
sqlite3_close(database);
}
else
NSLog(@"Database cannot be opened");
我得到的错误为:
*终止应用程序由于uncaug ht异常'NSInternalInconsistencyException', 原因:'选择时出错。 '未知错误''
如何解决此问题?
我做了另一个改变,看它是否会工作但我得到新的错误更改是NSString * selectSQL = [NSString stringWithFormat:@“从动物列表中选择品种,其中mainBreed =%@”,trimString];新的错误是:***终止应用程序由于未捕获的异常'NSInternalInconsistencyException',原因:'错误,同时删除。 '没有这样的专栏:羊'' – anjum 2012-04-17 08:38:03