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  • Objective-C: Cannot Change Value of Instance Variable Inside a Function

    - by user262325
    Hello everyone, I cannot change the value of an instance variable inside a function. I have defined a class: // info.h #import <Foundation/Foundation.h> @interface NSMyObject : NSObject { NSInteger i; } -(void) setI:(NSInteger)v; @end #import "info.h" @implementation NSMyObject -(void) setI:(NSInteger)v ; { i=v; } - (void)dealloc { [super dealloc]; } @end I call a function 'myFunction' with parameter temObj which is a NSMyObject instance. myFunction(temObj);//temObj is NSMyObject In the function, I can change the value of the instance variable of parameter obj. -(void)myFunction:(NSMyObject*) obj; { [obj setI:0]; } ... expecting this to change the content of temObj. But when I check the results of operation on obj in function myFunction the value of temObj.i has not changed. Welcome any comment Thanks

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  • sqlite 3 opening issue

    - by anonymous
    I'm getting my data ,with several similar methods, from sqlite3 file like in following code: -(NSMutableArray *) getCountersByID:(NSString *) championID{ NSMutableArray *arrayOfCounters; arrayOfCounters = [[NSMutableArray alloc] init]; @try { NSFileManager *fileManager = [NSFileManager defaultManager]; NSString *databasePath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"DatabaseCounters.sqlite"]; BOOL success = [fileManager fileExistsAtPath:databasePath]; if (!success) { NSLog(@"cannot connect to Database! at filepath %@",databasePath); } else{ NSLog (@"SUCCESS getCountersByID!!"); } if(sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK){ NSString *tempString = [NSString stringWithFormat:@"SELECT COUNTER_ID FROM COUNTERS WHERE CHAMPION_ID = %@",championID]; const char *sql = [tempString cStringUsingEncoding:NSASCIIStringEncoding]; sqlite3_stmt *sqlStatement; int ret = sqlite3_prepare(database, sql, -1, &sqlStatement, NULL); if (ret != SQLITE_OK) { NSLog(@"Error calling sqlite3_prepare: %d", ret); } if(sqlite3_prepare_v2(database, sql, -1, &sqlStatement, NULL) == SQLITE_OK){ while (sqlite3_step(sqlStatement)==SQLITE_ROW) { counterList *CounterList = [[counterList alloc]init]; CounterList.counterID = [NSString stringWithUTF8String:(char *) sqlite3_column_text(sqlStatement,0)]; [arrayOfCounters addObject:CounterList]; } } else{ NSLog(@"problem with database prepare"); } sqlite3_finalize(sqlStatement); } else{ NSLog(@"problem with database openning %s",sqlite3_errmsg(database)); } } @catch (NSException *exception){ NSLog(@"An exception occured: %@", [exception reason]); } @finally{ sqlite3_close(database); return arrayOfCounters; } //end } then i'm getting access to data with this and other similar lines of code: myCounterList *MyCounterList = [[myCounterList alloc] init]; countersTempArray = [MyCounterList getCountersByID:"2"]; [countersArray addObject:[NSString stringWithFormat:@"%@",(((counterList *) [countersTempArray objectAtIndex:i]).counterID)]]; I'm getting a lot of data like image name and showing combination of them that depends on users input with such code: UIImage *tempImage = [UIImage imageNamed:[NSString stringWithFormat:@"%@_0.jpg",[countersArray objectAtIndex:0]]]; [championSelection setBackgroundImage:tempImage forState:UIControlStateNormal]; My problem: When i'm run my app for some time and get a lot of data it throws error: " problem with database openning unable to open database file - error = 24 (Too many open files)" My guess is that i'm opening my database every time when getCountersByID is called but not closing it. My question: Am i using right approach to open and close database that i use? Similar questions that have not helped me to solve this problem: unable to open database Sqlite Opening Error : Unable to open database UPDATE: I made assumption that error is showing up because i use this lines of code too much: NSFileManager *fileManager = [NSFileManager defaultManager]; NSString *databasePath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"DatabaseCounters.sqlite"]; BOOL success = [fileManager fileExistsAtPath:databasePath]; and ending up with error 24. So i made them global but sqlite3_errmsg shows same err 24, but app runs much faster now I'll try to debug my app, see what happens

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  • indentationLevel property doesn't appear to do anything?

    - by JoBu1324
    I'm have a number rows I'm inserting into a table using -insertRowsAtIndexPaths:withRowAnimation, and I would like the rows to be indented from the left to distinguish them from the rest of the cells. The indentationLevel property of UITableViewCell looks like it's exactly what I need, but it doesn't seem to do anything. Here's the code I'm using to set the indentation level (dot syntax doesn't make a difference): [cell setIndentationWidth:10]; [cell setIndentationLevel:1]; Is indentationLevel what I want, or should I be looking elsewhere?

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  • iOS Development: Can I store an array of integers in a Core Data object without creating a new table to represent the array?

    - by BeachRunnerJoe
    Hello. I'm using Core Data and I'm trying to figure out the simplest way to store an array of integers in one of my Core Data entities. Currently, my entities contain various arrays of objects that are more complex than a single number, so it makes sense to represent those arrays as tables in my DB and attach them using relationships. If I want to store a simple array of integers, do I need to create a new table with a single column and attach it using a one-to-many relationship? Or is there a more simple way? Thanks in advance for your wisdom!

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  • application Crash when assign multiple argu fun to dynamic button

    - by AJPatel
    for (int i=0;i<[tableDataSource count];i++) { NSDictionary *dict = [tableDataSource objectAtIndex:i]; rowText = [dict objectForKey:@"title"]; UIButton *btn = [UIButton buttonWithType: UIButtonTypeRoundedRect]; [btn setTitle:rowText forState:UIControlStateNormal]; [btn addTarget:self action:@selector(myActionbtnText:) forControlEvents:UIControlEventTouchUpInside]; btn.frame = CGRectMake(60, 40+2*(40*i), 200, 40); btn.alpha = 0.81; [self.view addSubview:btn]; } I got error at assign Action to dynamic button MY action is given Below -(void) myAction:(NSString *)btnText; { NSLog(@"%@ Button Clicked",btnText); }

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  • Failure when adding images to a thumbnail gallery

    - by Martin KS
    morning all, I've been browsing around trying to work out what I've done wrong when trying to add a thumbnail to a gallery view, but can't work out what on earth it might be. I'm trying to use the following code to stick a thumbnail onto a blank view: UIImageView *any = [[UIImageView alloc] initWithFrame:CGRectMake(a,b,70,60)]; any.image = [UIImage imageNamed:selectedThumbPath]; any.tag = 0; [self.view addSubview:any]; In the above example: a = 165 b = 150 selectedThumbPath = the full path to a thumbnail ie. /users/Cleverbum/library etc I'm pulling my hair out, there are no error messages, and no clues as to why it's not drawing anything. What's worse is that this is one of the only parts of the code i've not changed!

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  • Extend PickerViews Component while touching

    - by vikingosegundo
    I have a UIPickerView with a variable number of components to display. In its contoller i have this -pickerView:withForComponent: - (CGFloat)pickerView:(UIPickerView *)pv widthForComponent:(NSInteger)component { CGFloat f; if (component == 0) { f = 30; } else { if ([componentsData count]>2) { f = 260.0/([componentsData count]-1); } else{ f = 260.0; } } return f; } this works fine if I call [pickerView reloadAllComponents], but how could I extend a components width if it is touched (and of course shrink all others)?

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  • Objective C: Using UIImage for Stroking

    - by SeongHo
    I am trying to apply a texture for my brush but i'm really having a hard time figuring how it is done. Here's the image of my output. I used an UIImage that just follows the touch on the screen but when i swipe it faster the result is on the right side "W", and on the left side that's the result when i swipe it slow. i tried using the CGContextMoveToPoint and CGContextAddLineToPoint i don't know how apply the texture. Is it possible to use UIImage for the stroke texture? Here's my code UIImage * brushImageTexture = [UIImage imageNamed:@"brushImage.png"]; [brushImagetexture drawAtPoint:CGPointMake(touchCurrentPosition.x, touchVurrentPosition.y) blendMode:blendMode alpha:1.0f];

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  • sending image in a faceless email

    - by anurag
    I am trying to send a faceless(without showing the interface)email by using the code below: I also want to attach an image to this email can anybody suggest is it possible??? (void) sendEmailTo:(NSString *)toStr withSubject:(NSString *)subjectStr withBody:(NSString *)bodyStr { NSString *emailString=[[NSString alloc] initWithFormat:@"mailto:?to=%@&subject=%@&body=%@", [toStr stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding], [subjectStr stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding], [bodyStr stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding]]; [[UIApplication sharedApplication] openURL:[NSURL URLWithString:emailString]]; [emailString release]; }

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  • Dynamic attached UILabel is not moving.

    - by coure06
    I have attached a UILabel to view. Now i want to move that label but its not working. here is my code UILabel *tick = (UILabel *)[self.view viewWithTag:tag]; CGRect frame = tick.frame; frame.origin.x = newVal; frame.origin.y = newVal; I can change text value of the UILabel tick but how can i move it here and there?

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  • problem in presentmodelviewcontroller?

    - by Bala
    i am using tabbarcontroller. In tabbar having one view.In that tab i call one function using Nstimer it open another viewcontroller. First * sVC = [[First alloc] initWithNibName:@"First" bundle:[NSBundle mainBundle]]; [self presentModalViewController:sVC animated:YES]; Opened viewcontrller having one button.when user click that button i want to close the view and call Nstimer. [self dismissModalViewControllerAnimated:NO] The problem is first the view opened and closed but second time view could not open.

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  • recursive enumeration of integer subsets?

    - by KDaker
    I have an NSArray of NSNumbers with integer values such as [1,10,3]. I want to get the sum of all the possible subsets of these numbers. For example for 1,10 and 3 i would get: 1, 10, 3, 1+10=11, 1+3=4, 10+3=13, 1+10+3=14 there are 2^n possible combinations. I understand the math of it but im having difficulties putting this into code. so how can i put this into a method that would take the initial array of numbers and return an array with all the sums of the subsets? e.g -(NSArray *) getSums:(NSArray *)numbers; I understand that the results grow exponentially but im going to be using it for small sets of numbers.

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  • RTL shows numbers at the end of lines

    - by Tiger
    Hi. Trying to display a hebrew string that starts with a number, always displays the number at the end of the string like so: 1. ??? ???? ????? but I need the number to be displayed at the right side of the text- any solution to that? It happens with UILabel & UITextField & UITextView and trying to write the number at the left side also produce the same resault. Playing with combinations of UITextAlignment will doesn't help.

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  • iPad search bar bad memory access?

    - by Geoff Baum
    Hello all, So I am trying to implement a search bar in my app and am very close but can't seem to figure out where this memory error is occurring. This is what part of my search method looks like: filters = [[NSMutableArray alloc] init]; NSString *searchText = detailSearch.text; NSMutableArray *searchArray = [[NSMutableArray alloc] init]; // Normally holds the object (ex: 70 locations) searchArray = self.copyOfFilters ; //This is the line that is breaking after ~2-3 letters are entered in the search for (NSString *sTemp in searchArray) { NSRange titleResultsRange = [sTemp rangeOfString:searchText options:NSCaseInsensitiveSearch]; if (titleResultsRange.length > 0) [filters addObject:sTemp]; } displayedFilters = filters; copyOfFilters is a deep copy of the displayed filters that appear when the view first loads via: self.copyOfFilters = [[NSMutableArray alloc] initWithArray:displayedFilters copyItems:YES]; I have traced through the entry of letters and it is accurate after 2 letters, but once you try and enter a letter after a space in the search bar, it crashes. The value of copyOfFilters = {(int)[$VAR count]} objects. Does anyone know what may be causing this? Thanks!

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  • UISearchBar disable table view on activation

    - by Sankel
    Hi there. I have a UISearchBar in the table cell. All done in code (not in IB). When the search bar is activated I want to disable the table view are between the search bar and keyboard, so there is no way to touch and navigate out of this view. Cannot really get it working. Help please.

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  • How do I prevent my table cell's textview from being editable after editing is done?

    - by Gorgando
    So this is an interesting problem. I have custom tableviewcells that include a text field. When In my cellForRowAtIndexPath I have an if statement that determines whether or not the cell's text field should be editable- it looks like this: (self.isEditing) ? [infoCell.textField setEnabled:YES] : [infoCell.textField setEnabled:NO]; This actually works well - except for the issue I'm having. It makes it so that when the tableview is displayed, the rows' text field cannot be edited. When the user clicks "Edit" to put it into editing mode, then the text fields are enabled for editing. The Problem: When I am editing a field, and click "Done", it goes back to the regular tableview but the keyboard stays visible and the last cell's text field I was editing continues to be editable. What Should happen: The keyboard should go away and all the cells' text fields should no longer be editable. Any ideas about what could be going wrong? Things to look for? Thanks!

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  • How to set the width of a cell in a UITableView in grouped style

    - by Tomen
    I have been working on this for about 2 days, so i thought i share my learnings with you. The question is: Is it possible to make the width of a cell in a grouped UITableView smaller? The answer is: No. But there are two ways you can get around this problem. Solution #1: A thinner table It is possible to change the frame of the tableView, so that the table will be smaller. This will result in UITableView rendering the cell inside with the reduced width. A solution for this can look like this: -(void)viewWillAppear:(BOOL)animated { CGFloat tableBorderLeft = 20; CGFloat tableBorderRight = 20; CGRect tableRect = self.view.frame; tableRect.origin.x += tableBorderLeft; // make the table begin a few pixels right from its origin tableRect.size.width -= tableBorderLeft + tableBorderRight // reduce the width of the table tableView.frame = tableRect; } Solution #2: Having cells rendered by images This solution is described here: http://cocoawithlove.com/2009/04/easy-custom-uitableview-drawing.html I hope this information is helpful to you. It took me about 2 days to try a lot of possibilities. This is what was left.

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  • how to get variable stored in another object using objective c

    - by mac
    Hi All SaveNotes *saveNotes = [[SaveNotes alloc]initWithTitleString:title descrString:descr]; [titleDescrObjects addObject:saveNotes]; [saveNotes release]; from the above code i have saved title,descr to a class SaveNotes , and then i have stored that object in my NSMutableArray - titleDescrObjects, Its working fine, i need to get particular objects "descr" alone, how to get the descr from objectAtIndex:i i am trying for (int i=0; i<[titleDescrObjects count]; i++) { NSLog(@"\n ((%@))\n",[titleDescrObjects objectAtIndex:i].descr); } Thanks in advance,

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  • Find the end/finish coordinates you a UISwipeGestureRecognizer

    - by Code
    I can find the start coordinates of where a swipe starts by doing the following - (void)oneFingerSwipeUp:(UISwipeGestureRecognizer *)recognizer { CGPoint point = [recognizer locationInView:[self view]]; NSLog(@"Swipe up - start location: %f,%f", point.x, point.y); } Is it possible to find the coordinates where the swipe ended? I looked into the docs and its not mentioned. Is there some work around for this? Many Thanks, -Code

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