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• How can i use Table Cell as UIImageView not using Custum Cell?

  - by Ankit

  In My Application I have to show Image after every 3 Rows.My Image is static and it should come after every 3 rows.I don't want to take UIImageView and add it to cell but if there any way to show my image using directly Cell's property.My Image size is 320X87 pixels.

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• What happens if I don't handle audio interruptions?

  - by mystify

  Is it possible to still play sound / music even if audio has been interrupted, or more precisely: even if MyInterruptionListener got called from the OS with the interruption state kAudioSessionBeginInterruption ? Yeah I know that's not good idea to do. But want to know anyways.

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• How do you call a method for an Objective-C object's superclass from elsewhere?

  - by executor21

  If you're implementing a subclass, you can, within your implementation, explicitly call the superclass's method, even if you've overridden that method, i.e.: [self overriddenMethod]; //calls the subclass's method [super overriddenMethod]; //calls the superclass's method What if you want to call the superclass's method from somewhere outside the subclass's implementation, i.e.: [[object super] overriddenMethod]; //crashes Is this even possible? And by extension, is it possible to go up more than one level within the implementation, i.e.: [[super super] overriddenMethod]; //will this work?

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• How can i scroll to the nearest page in a UIScrollView with paging enabled?

  - by nathanjosiah

  [UIScrollView setContentOffset:CGPointMake(floor((UIScrollView.contentOffset.x - UIScrollView.frame.size.width * 2) / UIScrollView.frame.size.width), 0) animated:NO]; thats all i have but it doesn't work correctly

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• A question related to UIButton

  - by vikas Savardekar

  I have taken customview in my code for UIButton. UIButton *button= [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain]; //(UIButton *)newCell.accessoryView; [button addTarget:self action:@selector(checkedimage:) forControlEvents:UIControlEventTouchUpInside]; -(IBAction)checkedimage:(id)sender { NSLog(@"checkedimage"); if(checkImage == NO) { newImage = [UIImage imageNamed:@"a.png"]; checkImage=YES; } else if(checkImage==YES) { newImage = [UIImage imageNamed:@"b.png"]; checkImage=NO; } } but when i click on UIButton it is not going to action checkedimage why?

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• How to apply a force which should not be continuos

  - by sohan

  I have a body which I move with the help of a button,here is what Im doing -(void) step: (ccTime) delta { int steps = 2; CGFloat dt = delta/(CGFloat)steps; for(int i=0; iactiveShapes, &eachShape, nil); cpSpaceHashEach(space-staticShapes, &eachShape, nil); if(MoveBody) { cpFloat movementPadding = 0.1; cpBodyApplyForce(body, cpvmult(ccp( 10, 0), movementPadding), cpvzero); } else cpBodyResetForces(body); } I just want to stop the body moving whenever the condition fails,I am trying to reset all forces to 0 with cpBodyResetForces(body),but this never work,it just keep on moving. can anyone help me how can I stop the body moving?

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• Apple application names

  - by Moshe

  In the provisioning portal, can I "reserve" application names? Once reserved, can I transfer those names to other accounts? (Presumably by renaming the first app and then renaming the second one on the other account to the original name?

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• Trouble refreshing UITableView

  - by aahrens

  I'm trying to develop a basic GPA Calculator. I have an AllCourses class that holds Course objects. I have an AllCourses object in my CalcAppDelegate. In my ThirdViewController I can successfully update the number of Courses in my AllCourses object. However, the problem I'm having is that when I switch to the RootViewController the UITable isn't being repopulated with the updated Courses that were added. I tried [self reloadData] in the viewWillAppear in my RootViewController but it caused my app to close. I didn't use IB to create the views so I think it could be the case that I don't have things hooked up correctly. I did it programatically. Does anyone see anything I'm missing in my code? Here is the link to my project http://files.me.com/aahrens/q0odzi

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• Performing multiple fetches in Core Data within the same view

  - by yesimarobot

  I have my CD store setup and everything is working. Once my initial fetch is performed, I need to perform several fetches based on calculations using the data from my first fetch. The examples provided from Apple are great, and helped me get everything going but I'm struggling with executing successive fetches. Any suggestions, or tutorial links are appreciated. Table View loads data from CD store. When a user taps a row it pushes a detail view The detail view loads details from CD. [THE ABOVE STEPS ARE ALL WORKING] I perform several calculations on the data fetched in the detail view. I need to then perform several other fetches based on the results of my calculations.

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• NSXMLParser 's delegate and memory leak

  - by dizzy_fingers

  Hello, I am using a NSXMLParser class in my program and I assign a delegate to it. This delegate, though, gets retained by the setDelegate: method resulting to a minor, yet annoying :-), memory leak. I cannot release the delegate class after the setDelegate: because the program will crash. Here is my code: self.parserDelegate = [[ParserDelegate alloc] init]; //retainCount:1 self.xmlParser = [[NSXMLParser alloc] initWithData:self.xmlData]; [self.xmlParser setDelegate:self.parserDelegate]; //retainCount:2 [self.xmlParser parse]; [self.xmlParser release]; ParserDelegate is the delegate class. Of course if I set 'self' as the delegate, I will have no problem but I would like to know if there is a way to use a different class as delegate with no leaks. Thank you in advance.

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• want to go to next view from rightbarbutton item.

  - by uttam

  I am using this code to get the three button on the right side of the navigationbar ,button are visible but next to this I want to go to the next view from this three button image, text ,vedio. NSArray *segmentTextContent = [NSArray arrayWithObjects:@"Image",@"Text",@"Video",nil]; UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:segmentTextContent]; segmentedControl.frame = CGRectMake(13, 20, 150, kCustomButtonHeight); segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar; segmentedControl.momentary = YES; defaultTintColor = [segmentedControl.tintColor retain]; // keep track of this for later UIBarButtonItem *segmentBarItem = [[UIBarButtonItem alloc] initWithCustomView:segmentedControl]; self.navigationItem.rightBarButtonItem = segmentBarItem; if(segmentedControl.selectedSegmentIndex=0) { [segmentedControl addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged]; } else if(segmentedControl.selectedSegmentIndex==1) { [segmentedControl addTarget:self action:@selector(segmentAction1:) forControlEvents:UIControlEventValueChanged]; } else if(segmentedControl.selectedSegmentIndex==2) { [segmentedControl addTarget:self action:@selector(segmentAction2:) forControlEvents:UIControlEventValueChanged]; } [segmentBarItem release]; //[modalBarButtonItem release]; } return self; }

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• How to extract the actual NSString from json object as NSArray

  - by Toran Billups

  I'm working with a large set of json and really just need the NSString representation of what's inside the NSArray -including all the { } My question is this - is their a better way than simply looping through each NSArray inside the main NSArray and outputting the description one by one? ie- the below is a start to this process but it's very brittle meaning I need to know each item inside the hat {} and this isn't something I actually care about. I just need the json string to move forward. The working code is below (thank you in advance!) NSString* responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]; [responseData release]; NSArray* json = [responseString JSONValue]; NSArray* item = [json valueForKeyPath:@"d.data"]; NSArray* hatjson = [item objectForKey:@"hat"]; NSMutableString * result = [[NSMutableString alloc] init]; for (NSObject * obj in hatjson) { [result appendString:[obj description]]; } NSLog(@"the hat json is .. %@", result);

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• Default App Icon not appearing in iOS Simulator

  - by user577466

  I have searched quite a lot for an answer to this problem. If I have a general application, HelloWorld, and create an interface and then go to test it, then click on the Home button, not even the default grey/white icon is there like it's supposed to be. Anyone have any ideas why? I've even tried specifying a custom icon in the Info.plist file, but still nothing... I've got the latest version of Xcode and the SDK as well. (3.25 - 4.2)

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• Flexible Data source for Multi-Section Table View Controller

  - by TuanCM

  I have a TableViewController which display a list of NewsItem objects: @interface NewsItem : NSObject { NSString *feedID; NSString *title; NSDate *published; } I'm trying to implement a Table View Controller (multiple sections) that can display the list in two ways: One divide News Items into sections which based on Published Date The other would be based on FeedID (News source). And I don't know how to structure the data source so that the code is easy to maintain. I tried to put the list of News Items into a 2 dimension Array in this case is a NSMutableArray of NSArray objects. However I got some objc_exception_throw and I don't think this is flexible enough. Could you guys give me some ideas?

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• UITextField start at end of text

  - by Raphael Pinto

  I created an UITextField in my App. This text field display a long text. The problem is that when I first open the view containing the UITextField, it is automaticaly show the end of my text. But I want it to show the begining. I read the UITextFiled Class Reference on Apple dev center, but nothing seem to allow me to change it. How can I do?

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• When and where should I add a view to a UITableView's footer?

  - by camelCase

  I am populating a UITableViewController's UITableView through code only. At the bottom of the table I wish to position a button that scrolls into view as the user scrolls to the bottom of the table. When in the UITableViewController life cycle should I populate the table footer with a button? viewDidLoad? p.s. I wish to avoid using section footers in the UITableView.

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• UIWebView appears null when calling fro a method

  - by Alexidze

  I have a major problem when trying to access a UIWebView that was created during ViewDidLoad, the UIWebView appears null here is how i declare the property @property (nonatomic, retain) UIWebView *detailsView; the implementation @implementation iPadMainViewController @synthesize detailsView; - (void)viewDidLoad { [super viewDidLoad]; detailsView = [[UIWebView alloc] initWithFrame:CGRectMake(500, 0, 512, 768)]; [self.view addSubView:detailsView]; } When accessing from - (void)loadDetailedContent:(NSString *)s { NSLog(@"%@", detailsView); } I get NULL, is it a normal behavior or am i doing something wrong? here is the touchesBegan that is being called, from the views subclass that is being touched, -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { iPadMainViewController *mycontroller = [[iPadMainViewController alloc] init]; self.delegate = mycontroller; [self.delegate loadDetailedContent:NewsId]; }

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• UITableView - Loading data from internet

  - by Emil

  Hey. I have seen many apps that load data to UITableViews from the internet, and they usually load smoothly. Now it's my turn to load in that kind of data. I am getting different data at the same time, separating categories with ~ and pieces of categories with #. This works great, and I have managed to separate the data in obj-c perfectly. Everything in my app works, it's just that the loading takes a lot of time. So, I guess the real question is, how can you load in data for a tableView in the background, showing a label/UIActivityView or something while it is loading? Thank you.

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• Is there any method that calls automatically when we click on to the textview?

  - by monish

  Hi Guys, I need a help from ur side. Actually I need to call a method automatically when I click on to the textview. Is there any delegate methods or any other process for this. Anyone's help will be much appreciated. Thank you, Monish.

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• How to draw a line with an arrow head?

  - by Rose

  I need to draw a line with an arrow head. How can i do this using Core graphics. Any help!!!

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• drag object vertically

  - by blacksheep

  i like to drag this object vertically instead of horizontally, which is doin it now: (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [[event allTouches] anyObject]; CGPoint location = [touch locationInView:touch.view]; if (CGRectContainsPoint(myObject.frame, location)){ CGPoint xLocation = CGPointMake(location.x, myObject.center.y); myObject.center = xLocation; } }

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• Does UIScrollView have a special content view for making the scrolling possible?

  - by mystify

  I wonder if UIScrollView has got an "hidden" subview acting as an container for the content. If I scroll a scroll view, is that content view moved up/down in the scroll view? Or is the scrolling offset applied to the bounds of that UIScrollView instance? Or: Does UIScrollView use an additional view as container, or is all content added directly to the view? The documentation doesn't tell much about wether it has a content container or not.

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• Locating the UIView that UITableView scrolls over

  - by Coocoo4Cocoa

  Hi all, I'm working on trying to obtain the UIView that UITableView scrolls over, if scrolling is enabled. Typically, the background is white, and if you push the UITableView out of its bounds, you'll see a background. I'm trying to set this background to a UIColor of blackColor. I can't seem to find the appropriate one to tag. I've tried the following code in my UIViewController: - (void)loadView { [super loadView]; UITableView *aTableView = [[[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStylePlain] autorelease]; [aTableView setScrollEnabled:YES]; [self.view setBackgroundColor:[UIColor blackColor]]; [self.view addSubview:aTableView]; self.tableView = aTableView; } The color still stays white. Seems I'm hitting the wrong UIView. Any idea? Thanks.

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• Pass string from tableviewcontroller to viewcontroller in navigation stack

  - by Jonathan

  How should I pass a string to the view controller that gets pushed when a tableviewcell is selected. Should I create a custom init method in the view controller? eg [[myvc alloc]initWithURL:...] Set a property? eg [myvc setURL:...] or myvc.url = ... or just create a custom method? [myvc setLoadingURL:...]

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• Releasing Autopool crashes on iOS 4.0 (and only on 4.0)

  - by samsam

  Hi there. I'm wondering what could cause this. I have several methods in my code that i call using performSelectorInBackground. Within each of these methods i have an Autoreleasepool that is being alloced/initialized at the beginning and released at the end of the method. this perfectly works on iOS 3.1.3 / 3.2 / 4.2 / 4.2.1 but it fataly crashes on iOS 4.0 with a EXC_BAD_ACCESS Exception that happens after calling [myPool release]. After I noticed this strange behaviour I was thinking about rewriting portions of my code and to make my app "less parallel" in case that the client os is 4.0. After I did that, the next point where the app crashed was within the ReachabilityCallback-Method from Apples Reachability "Framework". well, now I'm not quite sure what to do. The things i do within my threaded methods is pretty simple xml parsing (no cocoa calls or stuff that would affect the UI). After each method finishes it posts a notification which the coordinating-thread listens to and once all the parallelized methods have finished, the coordinating thread calls viewcontrollers etc... I have absolutely no clue what could cause this weird behaviour. Especially because Apples Code fails as well. any help is greatly appreciated! thanks, sam

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