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POApp crashing: Index out of bound at random places
 

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  1. POApp crashing: Index out of bound at random places
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    <p>My app is crashing at different places but the error is same as below only the index changes sometimes, any idea why is that happening I am attaching my screenshot as well:</p> <pre><code>*** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayM objectAtIndex:]: index 1 beyond bounds for empty array' *** First throw call stack: (0x20d4012 0x1e34e7e 0x20760b4 0x152ba 0xdc4067 0xdc42db 0x14fca 0x16aa7 0x239253f 0x23a4014 0x2393fd6 0x23a4014 0x239b8b7 0x2397405 0x2394768 0x207aaf5 0x2079f44 0x2079e1b 0x2ca87e3 0x2ca8668 0xd78ffc 0x2b8d 0x2ab5) libc++abi.dylib: terminate called throwing an exception (lldb) </code></pre> <p>I have tried debugging it to pinpoint exact location or line of code that is causing the crash but with no success. It is just randomly crashing</p> <p>Thanks<img src="https://i.stack.imgur.com/3NQPH.png" alt="enter image description here"></p> <p><strong>EDIT 1:</strong></p> <p>Alright here's the code:</p> <p><strong>Once fetched I am saving them like:</strong></p> <pre><code>-(void)saveTweetsArray:(NSMutableArray *)array{ NSString *dbPath = [DatabaseHelper databasePath]; sqlite3_stmt *statement; if(sqlite3_open([dbPath UTF8String], &amp;db) == SQLITE_OK) { NSString *insertSql = [NSString stringWithFormat:@"delete from %@ where ACCOUNTID='%@'",[DatabaseHelper TweetsTable],self.accountId]; const char *insertStmt = [insertSql UTF8String]; sqlite3_prepare_v2(db, insertStmt, -1, &amp;statement, NULL); if(sqlite3_step(statement) == SQLITE_DONE){ NSLog(@"old tweets removed"); } else{ NSLog(@" deletion failed"); NSLog(@"%@", [NSString stringWithUTF8String:(char*)sqlite3_errmsg(db)]); } sqlite3_finalize(statement); for(int i=0;i&lt;[array count];i++){ NSMutableDictionary *dictionary = [array objectAtIndex:i]; NSString *insertSql = [NSString stringWithFormat:@"insert into %@ (ID,TWEET_TEXT,USER_NAME,ACCOUNTID) values (?,?,?,?)",[DatabaseHelper TweetsTable]]; const char *insertStmt = [insertSql UTF8String]; sqlite3_prepare_v2(db, insertStmt, -1, &amp;statement, NULL); sqlite3_bind_text(statement, 1, [[dictionary valueForKey:@"id"] UTF8String], -1, NULL); sqlite3_bind_text(statement, 2, [[dictionary valueForKey:@"text"] UTF8String], -1, NULL); sqlite3_bind_text(statement, 3, [[dictionary valueForKey:@"userName"] UTF8String], -1, NULL); sqlite3_bind_text(statement, 4, [self.accountId UTF8String], -1, NULL); if(sqlite3_step(statement) == SQLITE_DONE) NSLog(@"data saved"); else{ NSLog(@"save failed"); NSLog(@"%@", [NSString stringWithUTF8String:(char*)sqlite3_errmsg(db)]); } sqlite3_finalize(statement); } sqlite3_close(db); } </code></pre> <p><strong>This is where I am fetching to populate on the tableview while new tweets are fetched:</strong></p> <pre><code>-(NSMutableArray*)tweetsArray{ NSMutableArray* tweetsArray=[[NSMutableArray alloc] init]; NSString *dbPath = [DatabaseHelper databasePath]; if(sqlite3_open([dbPath UTF8String], &amp;db) == SQLITE_OK) { const NSString *sql_stmt; sql_stmt= [NSString stringWithFormat:@"select ID,TWEET_TEXT,USER_NAME from %@ where ACCOUNTID='%@' ",[DatabaseHelper TweetsTable],self.accountId]; const char *sql_stmt1=[sql_stmt UTF8String]; sqlite3_stmt *compiledStatement; if(sqlite3_prepare_v2(db, sql_stmt1, -1, &amp;compiledStatement, NULL) == SQLITE_OK) { // Loop through the results and add them to the feeds array while(sqlite3_step(compiledStatement) == SQLITE_ROW) { // Read the data from the result row NSMutableDictionary *dictionary=[[NSMutableDictionary alloc] init]; [dictionary setValue:[NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 0)] forKey:@"id"]; [dictionary setValue:((char *)sqlite3_column_text(compiledStatement, 1))!=NULL?[NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 1)]:@"" forKey:@"text"]; [dictionary setValue:[NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 2)] forKey:@"userName"]; [textsArray addObject:dictionary]; } sqlite3_finalize(compiledStatement); } } sqlite3_close(db); return textsArray; } </code></pre> <p><strong>This is where I am putting on the tableview after formatting:</strong></p> <pre><code> -(void)formatTweetsAndPaintView{ NSArray *tweets = [dictionary valueForKey:@"twitter"]; //first save the old tweets to show while new are fetched NSMutableArray *tempTweets=[[NSMutableArray alloc] initWithArray:[baseController tweetsArray]]; //then clear the old tweets then format and fill array [[baseController tweetsArray] removeAllObjects]; if(tweets &amp;&amp; tweets.count){ for(int i=0;i&lt;[tweets count];i++){ NSMutableDictionary *tweetsDictionary = [[NSMutableDictionary alloc] init]; [tweetsDictionary setValue:[[tweets objectAtIndex:i] valueForKey:@"id_str"] forKey:@"id"]; [tweetsDictionary setValue:[[tweets objectAtIndex:i] valueForKey:@"text"] forKey:@"text"]; [tweetsDictionary setValue:[[[tweets objectAtIndex:i] valueForKey:@"user"] valueForKey:@"name"] forKey:@"userName"]; [[baseController tweetsArray] addObject:tweetsDictionary]; } } //include non duplicate tempTweet to tweetArray for(int i=0;i&lt;[tempTweets count];i++){ if(![[baseController tweetsArray] containsObject:[tempTweets objectAtIndex:i]]) [[baseController tweetsArray] addObject:[tempTweets objectAtIndex:i]]; } if([dictionary valueForKey:@"twitter"]) [baseController setDictionary:[dictionary valueForKey:@"twitter"]]; [baseController reloadTableViewData]; //finally save the tweets [[TweetDB _instance] saveTweetsArray:[baseController tweetsArray]]; } </code></pre>
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    1. PTQuestion
    1. USAtif Imran
    1. USAtif Imran
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    1. This table or related slice is empty.
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    1. PO
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    2. PO
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    1. This table or related slice is empty.
    1. COpost some code please
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      1. POApp crashing: Index out of bound at random places
      1. USIlario
    2. COWhenever you are fatching value from Array please check array count.Other wise put your code in try catch block.
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      1. POApp crashing: Index out of bound at random places
      1. USRon
    3. CODo **not** use try catch blocks in Objective-C except for programming errors that you do not expect to recover from. Not only is this not recommended they do not work correctly across stack frames.
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      1. POApp crashing: Index out of bound at random places
      1. USzaph
 

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