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  • File upload in iphone

    - by Sreelal
    Hi, I am developing an iphone application which needs to upload some image files to server.The images needs to be uploaded as binary data.I converted the image to NSData using [NSData dataWithContentsOfFile:filepath]; But i dont know how to convert this NSData to Binary data.Looking for a solution Thanks,

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  • Cycle backwards through NSArray

    - by dot
    Hello! I'm trying to cycle backwards through an array by clicking a button. My current code is close, but doesn't quite work. - (void)viewDidLoad { self.imageNames = [NSArray arrayWithObjects:@"MyFirstImage", @"AnotherImage", nil]; currentImageIndex = 0; [super viewDidLoad]; } ...what works: - (IBAction)change { UIImage* imageToShow = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:[imageNames objectAtIndex:currentImageIndex] ofType:@"png"]; currentImageIndex++; if (currentImageIndex >= imageNames.count) { currentImageIndex = 0; } } ...and what isn't working: - (IBAction)changeBack { UIImage* imageToShow = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:[imageNames objectAtIndex:currentImageIndex] ofType:@"png"]; currentImageIndex--; if (currentImageIndex >= imageNames.count) { currentImageIndex = 0; } } Any help is gladly appreciated! Thanks!

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  • Build UITextview with Line

    - by milanjansari
    Hello everybody, Does anyone idea about how can create UItextivew like same as below so user can easily write text in proper format. please check this link https://devforums.apple.com/message/217857#217857 is this possible, i have no idea about this. please anyone have idea above of the issue. Thanks you,

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  • Question about varrying top margin when using custom Fonts on the iPhone.

    - by user170030
    I am using FontLabel to display varying lengths of texts in a custom font. I size the FontLabel using the following : CGSize size = [myString sizeWithFont:[UIFont systemFontOfSize:[[[UIApplication sharedApplication] delegate] getFontSize]] constrainedToSize:CGSizeMake(290, 4000) lineBreakMode:UILineBreakModeWordWrap]; For some reason, this always presents a Fontlabel where the text starts at a different space from the top. Sometimes the text begins at the correct location. Other times, it appears either too high or too low. Would appreciate some help in how to solve this issue.

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  • Knowing which annotation is selected and accessing properties of it.

    - by kevin Mendoza
    So far my program can display a database of custom annotation views. Eventually I want my program to be able to display extra information after a button on the annotation bubble is clicked. Each element in the database has a unique entry Number, so I thought it would be a good idea to add this entry number as a property of the custom annotation. The problem I am having is that after the button is clicked and the program switches to a new view I am unable to retrieve the entry number of the annotation I selected. Below is the code that assigns the entry Number property to the annotation: for (id mine in mines) { workingCoordinate.latitude = [[mine latitudeInitial] doubleValue]; workingCoordinate.longitude = [[mine longitudeInitial] doubleValue]; iProspectAnnotation *tempMine = [[iProspectAnnotation alloc] initWithCoordinate:workingCoordinate]; [tempMine setTitle:[mine mineName]]; [tempMine setAnnotationEntryNumber:[mine entryNumber]]; } [mines dealloc]; When the button on an annotation is selected, this is the code that initializes the new view: - (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control { mineInformationController *controller = [[mineInformationController alloc] initWithNibName:@"mineInformationController" bundle:nil]; controller.modalTransitionStyle = UIModalTransitionStyleCrossDissolve; [self presentModalViewController:controller animated:YES]; [controller release]; } and lastly is my attempt at retrieving the entryNumber property from the new view so that I can compare it to the mines database and retrieve more information on the array element. iProspectFresno_LiteAppDelegate *appDelegate = (iProspectFresno_LiteAppDelegate *)[[UIApplication sharedApplication] delegate]; NSMutableArray* mines = [[NSMutableArray alloc] initWithArray:(NSMutableArray *)appDelegate.mines]; for(id mine in mines) { if ([[mine entryNumber] isEqualToNumber: /*the entry Number of the selected annotation*/]) { /* display the information in the mine object */ } } So how do I access this entry number property in this new view controller?

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  • Draw rectangle using Core Graphics with live preview

    - by mikawber
    I'm creating a simple drawing application and would like some help with drawing rectangles based on the user's touch events. I'm able to draw a rectangle using Core Graphics from the point in touchesBegan to the point in touchesEnded. This rectangle is then displayed once the touchesEnded event is fired. However, I would like to be able to do this in a 'live' fashion. Meaning, the rectangle is updated as the user drags their finger. Is this possible? Any help would be greatly appreciated, thank you!

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  • How to set the the height of cell progamatically without using nib file ?

    - by srikanth rongali
    This is my program - (void)viewDidLoad { [super viewDidLoad]; // Uncomment the following line to display an Edit button in the navigation bar for this view controller. self.title = @"Library"; self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Close" style:UIBarButtonItemStyleBordered target:self action:@selector(close:)]; // self.tableView.rowHeight = 80; } -(void)close:(id)sender { // } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease]; UILabel *dateLabel = [[UILabel alloc]init]; dateLabel.frame = CGRectMake(85.0f, 6.0f, 200.0f, 20.0f); dateLabel.tag = tag1; [cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator]; cell.contentView.frame = CGRectMake(0.0f, 0.0f, 320.0f, 80.0f); [cell.contentView addSubview:dateLabel]; [dateLabel release]; } // Set up the cell... //[(UILabel *)[cell viewWithTag:tag1] setText:@"Date"]; cell.textLabel.text = @"Date"; return cell; } I am setting the frame size of cell in tableView: but the cell is in default size only. I mean the height I set was 80 but it was not set as 80 height. How can I make it. Thank You

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  • Does Quartz2D test intersection of rect by line before drawing it.

    - by ddnv
    I'm drawing a big scheme that consist of a lot of lines. I do it in the drawRect: method of UIView. The scheme is larger than the layer of view and I check each line and draw it only if it intersects the visible rect. But at one moment I thought, should I do this? Maybe Quartz is already doing this test? So the question is: When I use function CGContextAddLineToPoint() does the Core Graphics tests this line for intersection with layer rect or it just draw it anyway?

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  • Trouble Copying custom class initialization

    - by Parad0x13
    I have a custom class of type NSObject that contains a single NSMutableArray. This class is called Mutable2DArray and is designed to emulate a 2 dimensional array of type NSMutableArray. There is a custom init method - (id)initWithX:(int)x Y:(int)y that asks for the dimensions for the array and allocates the required arrays within the only array the class owns. My issue is when I try to copy an instance of Mutable2DArray I get an error saying the copyWithZone is an unrecognized selector. I thought copy was a base method of NSObject so I'm confused why I cant create a copy of the instance like this: Mutable2DArray *Array1 = [[Mutable2DArray alloc] initWithX:10 Y:10]; Mutable2DArray *Array2 = [Array1 copy]; Am I missing something so obvious here?

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  • Objective - C, fastest way to show sequence of images in UIImageView

    - by Almas Adilbek
    I have hundreds of images, which are frame images of one animation (24 images per second). Each image size is 1024x690. My problem is, I need to make smooth animation iterating each image frame in UIImageView. I know I can use animationImages of UIImageView. But it crashes, because of memory problem. Also, I can use imageView.image = [UIImage imageNamed:@""] that would cache each image, so that the next repeat animation will be smooth. But, caching a lot of images crashed app. Now I use imageView.image = [UIImage imageWithContentsOfFile:@""], which does not crash app, but doesn't make animation so smooth. Maybe there is a better way to make good animation of frame images? Maybe I need to make some preparations, in order to somehow achieve better result. I need your advices. Thank you!

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  • "Warning reaching end of non-void fuction" with Multiple Sections that pull in multiple CustomCells

    - by Newbyman
    I'm getting "Reaching end of non-void function" warning, but don't have anything else to return for the compiler. How do I get around the warning?? I'm using customCells to display a table with 3 Sections. Each CustomCell is different, linked with another viewcontroller's tableview within the App, and is getting its data from its individual model. Everything works great in the Simulator and Devices, but I would like to get rid of the warning that I have. It is the only one I have, and it is pending me from uploading to App Store!! Within the - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {, I have used 3 separate If() statements-(i.e.==0,==1,==2) to control which customCells are displayed within each section throughout the tableview's cells. Each of the customCells were created in IB, pull there data from different models, and are used with other ViewController tableViews. At the end of the function, I don't have a "cell" or anything else to return, because I already specified which CustomCell to return within each of the If() statements. Because each of the CustomCells are referenced through the AppDelegate, I can not set up an empty cell at the start of the function and just set the empty cell equal to the desired CustomCell within each of the If() statements, as you can for text, labels, etc... My question is not a matter of fixing code within the If() statements, unless it is required. My Questions is in "How to remove the warning for reaching end of non-void function-(cellForRowAtIndexPath:) when I have already returned a value for every possible case: if(section == 0); if(section == 1); and if(section == 2). *Code-Reference: The actual file names were knocked down for simplicity, (section 0 refers to M's, section 1 refers to D's, and section 2 refers to B's). Here is a sample Layout of the code: //CELL FOR ROW AT INDEX PATH: -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { //Reference to the AppDelegate: MyAppDelegate *appDelegate = (MyAppDelegate *)[[UIApplication sharedApplication] delegate]; //Section 0: if(indexPath.section == 0) { static NSString *CustomMCellIdentifier = @"CustomMCellIdentifier"; MCustomCell *mCell = (MCustomCell *)[tableView dequeueReusableCellWithIdentifier:CustomMCellIdentifier]; if (mCell == nil) { NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"MCustomCell" owner:tableView options:nil]; for (id oneObject in nib) if ([oneObject isKindOfClass:[MCustomCell class]]) mCell = (MCustomCell *)oneObject; } //Grab the Data for this item: M *mM = [appDelegate.mms objectAtIndex:indexPath.row]; //Set the Cell [mCell setM:mM]; mCell.selectionStyle =UITableViewCellSelectionStyleNone; mCell.root = tableView; return mCell; } //Section 1: if(indexPath.section == 1) { static NSString *CustomDCellIdentifier = @"CustomDCellIdentifier"; DCustomCell *dCell = (DCustomCell *)[tableView dequeueReusableCellWithIdentifier:CustomDaddyCellIdentifier]; if (dCell == nil) { NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"DCustomCell" owner:tableView options:nil]; for (id oneObject in nib) if ([oneObject isKindOfClass:[DCustomCell class]]) dCell = (DCustomCell *)oneObject; } //Grab the Data for this item: D *dD = [appDelegate.dds objectAtIndex:indexPath.row]; //Set the Cell [dCell setD:dD]; //Turns the Cell's SelectionStyle Blue Highlighting off, but still permits the code to run! dCell.selectionStyle =UITableViewCellSelectionStyleNone; dCell.root = tableView; return dCell; } //Section 2: if(indexPath.section == 2) { static NSString *CustomBCellIdentifier = @"CustomBCellIdentifier"; BCustomCell *bCell = (BCustomCell *)[tableView dequeueReusableCellWithIdentifier:CustomBCellIdentifier]; if (bCell == nil) { NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"BCustomCell" owner:tableView options:nil]; for (id oneObject in nib) if ([oneObject isKindOfClass:[BCustomCell class]]) bCell = (BCustomCell *)oneObject; } //Grab the Data for this item: B *bB = [appDelegate.bbs objectAtIndex:indexPath.row]; //Set the Cell [bCell setB:bB]; bCell.selectionStyle =UITableViewCellSelectionStyleNone; bCell.root = tableView; return bCell; } //** Getting Warning "Control reaches end of non-void function" //Not sure what else to "return ???" all CustomCells were specified within the If() statements above for their corresponding IndexPath.Sections. } Any Suggestions ??

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  • How to manage lifecycle in a ViewGroup-derived class?

    - by Scott Smith
    I had a bunch of code in an activity that displays a running graph of some external data. As the activity code was getting kind of cluttered, I decided to extract this code and create a GraphView class: public class GraphView extends LinearLayout { public GraphView(Context context, AttributeSet attrs) { super(context, attrs); LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); inflater.inflate(R.layout.graph_view, this, true); } public void start() { // Perform initialization (bindings, timers, etc) here } public void stop() { // Unbind, destroy timers, yadda yadda } . . . } Moving stuff into this new LinearLayout-derived class was simple. But there was some lifecycle management code associated with creating and destroying timers and event listeners used by this graph (I didn't want this thing polling in the background if the activity was paused, for example). Coming from a MS Windows background, I kind of expected to find overridable onCreate() and onDestroy() methods or something similar, but I haven't found anything of the sort in LinearLayout (or any of its inherited members). Having to leave all of this initialization code in the Activity, and then having to pass it into the view seemed like it defeated the original purpose of encapsulating all of this code into a reusable view. I ended up adding two additional public methods to my view: start() and stop(). I make these calls from the activity's onResume() and onPause() methods respectively. This seems to work, but it feels like I'm using duct tape here. Does anyone know how this is typically done? I feel like I'm missing something...

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