CODEWITHSUNDEEP
iosobjective-cmultithreadingexc-bad-access
Gio Bact
Gio Bact

Reputation: 541

iOS error: Thread 1:EXC_BAD_ACCESS(code=1,address=0x726f635f)?

I got this problem in developing my first iOS app that manage a DB. I have a DB with scores of the game and want to show them in a table, when (at runtime) I enter the scoreView app crash with this error:

Thread 1:EXC_BAD_ACCESS(code=1,address=0x726f635f)

Here is the code that Xcode show me as responsible of this problem:

    if (sqlite3_prepare_v2(database, sql , -1, &select_statement, NULL)
    == SQLITE_OK) {
                    while (sqlite3_step(select_statement) == SQLITE_ROW){
                        // read from DB
                        NSString *rank = [NSString stringWithUTF8String:(char *)sqlite3_column_text(select_statement, 0)];
                        NSString *name = [NSString stringWithUTF8String:(char *)sqlite3_column_text(select_statement, 1)];
                        NSString *score = [NSString stringWithUTF8String:(char *)sqlite3_column_text(select_statement, 2)];
                        NSString *date = [NSString stringWithUTF8String:(char *)sqlite3_column_text(select_statement, 3)];

                        // I insert all the string in a dictionary
                        NSDictionary *dictionary = [[NSMutableDictionary alloc] initWithObjectsAndKeys:rank,@"Rank",name,@"Name",score,"Score",date,@"Date",nil];
                        [tempList addObject:dictionary];
                    }

                self.list = tempList;
                sqlite3_finalize(select_statement);
}

The error is in the line:

NSDictionary *dictionary = [[NSMutableDictionary alloc] initWithObjectsAndKeys:rank,@"Rank",name,@"Name",score,"Score",date,@"Date",nil];

After reading from DB I'm trying to save all strings in a dictionary and at the end all dictionaries (in tempList) go into "list", an array to show scores in the table. I read on the internet that this problem may be caused by different threads accessing the same object but I don't know how to solve it. I was following a tutorial for use DB in iOS app and of course this problem wasn't there. If someone can help me I'll very appreciate, thank you.

Upvotes: 0

Views: 2046

Answers (2)

Magyar Miklós
Magyar Miklós

Reputation: 4272

So first of all, I didn't see the line where you initialized your mutable array tempList before you trying to add an object.

NSMutableArray* tempList = [[NSMutableArray alloc]init];

And you have syntax error, and NSDictionary can't be initialized as NSMutableDictionary

NSDictionary *dictionary = [[NSDictionary alloc] initWithObjectsAndKeys:rank,@"Rank",name,@"Name",score,@"Score",date,@"Date",nil];
[tempList addObject:dictionary];

And for all string:

NSString *score = [[NSString alloc] initWithUTF8String:(char *)sqlite3_column_text(select_statement, 2)]

Upvotes: 0

Dan
Dan

Reputation: 1739

You have a syntax error:

... score, "Score" ...

should read:

... score, @"Score" ...

Upvotes: 1

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