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  • (iphone) How to access CGRect member variable inside c++ class?

    - by Eugene
    i have a c++ class with CGrect variable and i'm getting segfault when trying to access it. class Parent { //with some virtual functions/dtors }; class Child { public: void SetRect(CGRect rect) { mRect = rect; } CGRect GetRect() { return mRect; } int GetIndex() { return mIndex; } private: CGRect mRect; int mIndex; }; i'm doing CGRect rect = childPtr->GetRect(); from object c code and it segfaults. I printed *childPtr just before the call and rect looks fine with intended data value. int index = childPtr->GetIndex(); from same object c code(*.mm), works fine though. Any idea why I'm getting segfaults? Thank you edit - It's got something to do with virtual functions. (gdb) p singlePuzzlePiece-GetRect() Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_PROTECTION_FAILURE at address: 0x00000001 0x00000001 in ?? () Cannot access memory at address 0x1 The program being debugged was signaled while in a function called from GDB. GDB remains in the frame where the signal was received. To change this behavior use "set unwindonsignal on" Evaluation of the expression containing the function (at 0x1) will be abandoned. (gdb) Somehow, the function is not properly compiled?

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  • login using UITableView

    - by EquinoX
    How can I create a login for username/password just like in the skype application? I know it's a grouped table view.. but how can I do that? I searched the site and found the following code: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; UILabel *startDtLbl = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 80, 25)]; if (indexPath.row == 0) startDtLbl.text = @"Username"; else { startDtLbl.text = @"Password"; } startDtLbl.backgroundColor = [UIColor clearColor]; [cell.contentView addSubview:startDtLbl]; UITextField *passwordTF = [[UITextField alloc] initWithFrame:CGRectMake(100, 5, 200, 35)]; passwordTF.delegate = self; if (indexPath.row == 0) passwordTF.tag = 0; else { passwordTF.tag = 1; } [cell.contentView addSubview:passwordTF]; } return cell; } When I do: NSString * username = [((UITextField*)[self.view viewWithTag:0]) text]; NSString * password = [((UITextField*)[self.view viewWithTag:1]) text]; it gives me this error: Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIView text]: unrecognized selector sent to instance 0x6c3c600 Why is this?

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  • Remove Substring from NSstring

    - by user3037815
    I see so many solution , but none of them was matching my problem . As i am new to iOS development . I have a String abc/_api/web/GetFolderByServerRelativeUrl('Documents/Root Folder/Level 1/Level 2/Level 1-1/Level 1/')/folders. I want to remove Remove Substring after last "/" for example my new string should look like this. abc/_api/web/GetFolderByServerRelativeUrl('Documents/Root Folder/Level 1/Level 2/Level 1-1/Level 1/) Can someone suggest me the best way to achieve this , thanks ,

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  • iphone UIPicker question

    - by Rob
    I have a picker that prompts the user to choose a gender and an age group (17-21, 22-26, etc.) These 2 choices determine which view the user will be brought to after pressing the button, but I am having troubles writing the method for that button. The code I have so far is this: - (IBAction) buttonPressed { NSInteger genderRow = [genderPicker selectedRowInComponent:0]; NSString *genderSelected = [genderPickerData objectAtIndex:genderRow]; NSInteger ageRow = [agePicker selectedRowInComponent:1]; NSString *ageSelected = [agePickerData objectAtIndex:ageRow]; if (genderSelected == "Male" && ageSelected == "17-21") { Calc2ViewController *calc2ViewController = [[Calc2ViewController alloc] initWithNibName:@"Calc2View" bundle:[NSBundle mainBundle]]; [self.navigationController pushViewController:calc2ViewController animated:YES]; [calc2ViewController release]; calc2ViewController = nil; } } When I run the program, and select these 2 groups (Male and 17-21) - nothing happens. What am I missing?

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  • In-app settings controlled by plist?

    - by cannyboy
    Is there a library or good tutorial which covers creating in-app settings, like this: http://img.skitch.com/20090625-s8bf6ahybwe3cesd1id38h3nt.jpg What I would like is if it: doesn't use the built-in Settings app is controlled by a plist file with various Dictionaries and Arrays creates a nice looking table view allows text fields as well as switches and sliders and ticks etc doesn't have any of the annoying problems I've come across when trying to build my own version (not scrolling to show the textfield, cells disappearing) It would appear that the iphone dev world is crying out for such a thing. THANK YOU!

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  • Handling out of memory errors in iPhone

    - by hgpc
    I would like to handle out of memory errors in iPhone to execute logic with lesser memory requirements in case I run of of memory. In particular, I would like to do something very similar to the followin pseudo-code: UIImage* image; try { image = [UIImage imageNamed:@"high_quality_image.png"]; } catch (OutOfMemoryException e) { image = [UIImage imageNamed:@"low_quality_image.jpg"]; } First I attempt to load a high-quality image, and if I run out of memory while doing it, then I use a lower quality image. Would this be possible?

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  • Designing operation (a,b) -> (c,d)

    - by golergka
    I have an operation that I need to design. That operation takes two objects of a certain class X, and returns two new objects of the same class (I may need the originals later). The logic that dictates the selection of this object is contained in class Y. On one hand, I don't want class Y to know details about class X implementation; on the other, I don't want class X to know details about selecting the different objects to perform this operation on. If that was all the problem, I'd just create a static method on class A. However, the methods in language I'm working on return only one object. Also, the operation needs to be robust, and calling operation two times to get C and D respectively isn't possible, as both C & D both rely on a single random number. How should I design such operation? Update: I'm using Obejctive C.

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  • How to add button to UINavigationController.

    - by Aeolai
    I have the following code with adds a navigation controller to a modal view. The nav bar and view all appear ok, but the right button does not. What am I doing wrong? UpgradesViewController* upgradesViewController = [[UpgradesViewController alloc] initWithNibName:@"UpgradesView" bundle:nil]; upgradesViewController.title = @"Upgrades"; UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:upgradesViewController]; navController.modalTransitionStyle = UIModalTransitionStyleCoverVertical; navController.navigationBar.barStyle = UIBarStyleBlack; UIBarButtonItem* doneButton = [[UIBarButtonItem alloc] initWithTitle:@"Show" style:UIBarButtonItemStylePlain target: self action:nil]; navController.navigationItem.rightBarButtonItem = doneButton; [self presentModalViewController:navController animated:YES]; [navController release]; [upgradesViewController release];

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  • Iphone sdk : Where to put code for a grouped table.

    - by Dave
    I have a root view controller with no nib file, I tried adding this at cellForRowAtIndexPath as that passes in a UITableView as tableView. So I put : tableView = [[UITableView alloc] initWithFrame:self.view.frame style:UITableViewStyleGrouped]; It ran with no error but it didnt seem to change anything.

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  • How do I package an SDK (static lib + xibs) for the iPhone?

    - by twhipple
    I am creating an SDK for a client that includes predefined view controllers. What is the recommended way to package everything (static lib, .xib(s), and .png(s)) for easy use? SDKs that I've used (e.g. Pinch Media) do a good job of just providing a .h and .a file that expose only user accessible functionality and hiding everything else. As I read Apple's documentation, a framework would be ideal but is not permitted on iPhoneOS. Some key requirements: Don't expose source or object internals. Be easy to use & set up. Work on both the device and simulator. Thanks!

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  • WebView load javascript on the fly

    - by ADAM
    I have the following code which loads and html file into a webview - (void)awakeFromNib{ NSString *resourcesPath = [[NSBundle mainBundle] resourcePath]; NSString *htmlPath = [resourcesPath stringByAppendingString:@"/main.html"]; [[self mainFrame] loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:htmlPath]]]; } How would i dynamically load a css file (in the most efficient manner) as it does not suit to have the css file link in the html file

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  • Arrays and application data

    - by s0mmer
    Hello everyone, At the moment i'm making an application where it is possible to make profiles with different settings. Which datatypes would you recommend me saving these information in? I have a table which is showing the profile name and the version number. But for each profile there need to be stored more information. Therefore the idea i'm working on have 2 arrays. 1 for all the profile information and 1 who is being made when loading the information. The second array is the one going to be showed in the table. Because the table doesnt show all the stored information. .. but this seems kinda stupid. Is there a more suitable method for saving the information in like 1 array, and just pass part of the data to the tableview?

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  • Get nested data from local JSON file

    - by Lbase
    Now that I have the NSDictionary object JSONDictionary, how do I get the nested data inside of it? NSString *JSONFilePath = [[NSBundle mainBundle] pathForResource:@"sAPI" ofType:@"json"]; NSData *JSONData = [NSData dataWithContentsOfFile:JSONFilePath]; NSDictionary *JSONDictionary = [NSJSONSerialization JSONObjectWithData:JSONData options:kNilOptions error:nil]; NSLog(@"Dictionary: %@", JSONDictionary); sAPI.json snippet: { "ss": [{ "name": "bl", }, "ls": [{ "name": "ML", "abbreviation": "ml", "id": 10,

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  • How to map an property of ClassA to one of SuperclassA?

    - by mystify
    I have a class named SuperclassA, and an class named ClassA. ClassA inherits from SuperclassA. SuperclassA has got an property called something, so a very generic not-much-saying name. In ClassA, I want to have an property which maps to that something of SuperclassA. How could I do that? I want to make absolutely sure that any access to myBetterProperty results in accessing what's behind something. Assigning an value to myBetterProperty should result in assigning one to something, and vice versa. How to? Pointers set up in init? How would that look like? *self.myBetterProperty = &something; ? I'm not sure about that...

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  • SQLite3 database doesn't actually insert data - iPhone

    - by user334934
    I'm trying to add a new entry into my database, but it's not working. There are no errors thrown, and the code that is supposed to be executed after the insertion runs, meaning there are no errors with the query. But still, nothing is added to the database. I've tried both prepared statements and the simpler sqlite3_exec and it's the same result. I know my database is being loaded because the info for the tableview (and subsequent tableviews) are loaded from the database. The connection isn't the problem. Also, the log of the sqlite3_last_insert_rowid(db) returns the correct number for the next row. But still, the information is not saved. Here's my code: db = [Database openDatabase]; NSString *query = [NSString stringWithFormat:@"INSERT INTO lists (name) VALUES('%@')", newField.text]; NSLog(@"Query: %@",query); sqlite3_stmt *statement; if (sqlite3_prepare_v2(db, [query UTF8String], -1, &statement, nil) == SQLITE_OK) { if(sqlite3_step(statement) == SQLITE_DONE){ NSLog(@"You created a new list!"); int newListId = sqlite3_last_insert_rowid(db); MyList *newList = [[MyList alloc] initWithName:newField.text idNumber:[NSNumber numberWithInt:newListId]]; [self.listArray addObject:newList]; [newList release]; [self.tableView reloadData]; sqlite3_finalize(statement); } else { NSAssert1(0, @"Error while inserting data. '%s'", sqlite3_errmsg(db)); } } [Database closeDatabase:db]; Again, no errors have been thrown. The prepare and step statements return SQLITE_OK and SQLITE_DONE respectively, yet nothing happens. Any help is appreciated!

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  • UITextField with numbers and default keyboard

    - by n35
    Created a UITextField for "Postal Code/ZIP" field with a keyboardType of UIKeyboardTypeDefault. I would like to use the default keyboard but want the numbers & symbols to be shown by default as apposed to letters. Apple does this when you are entering addresses in the Contacts.app. Anyone know how to get this accomplished?

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  • Portrait vs Landscape Launch Images

    - by andrewx
    An iPad app can support inclusion of launch images in both orientations; presumably, if your app supports auto-rotation, then this would suggest to me that if the user launches an app while the device is in Landscape mode, then the Landscape launch image is used. But in all the apps I've built and released, this has never been the case. Never once has the Landscape launch image appeared, only the Portrait. After loading, the app will auto-rotate to whatever orientation the device is in, but at launch, it assumes you are in Portrait. Always. Why? I have seen many other apps in the store that behave this way, but then there are some seem to always automatically know immediately at first launch, from that first launch image, that you are in Landscape, if that's the case. How is this done?

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