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  • SQLite MYSQL character encoding

    - by Lee Armstrong
    I have a strange situation where the following code works however XCode warns it is deprecated... NSString *col1 = [NSString stringWithCString:(char *)sqlite3_column_text(compiledStatement, 0)]; However as that is the deprecated method if I set an encoding the string comes out wrong! I have tried all the encodings but none work! NSString *col1 = [NSString stringWithCString:(char *)sqlite3_column_text(compiledStatement, 0) encoding:NSASCIIStringEncoding];

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  • UITableView: Need a liveUpdate (Huge amount of cells)

    - by antihero
    Hey all, I have a UITableView which shows some information. The informations are from a XMLFile. The Xmlfile is pretty big, about 500 entries. I don't want that the user has to wait until the parsing has finished, i want to add cell by cell to the TableView. Here's my code: -(void) onFinishedPartDownload:(id)item { if(odvTableViewDelegateController.odvs == nil) odvTableViewDelegateController.odvs = [NSMutableArray new]; if([odvTableViewDelegateController.odvs count]==0) { genericDelegate.tableView.delegate = odvTableViewDelegateController; genericDelegate.tableView.dataSource = odvTableViewDelegateController; } [odvTableViewDelegateController.odvs addObject:item]; [genericDelegate.tableView reloadData]; } This method is called everytime an item has parsed, but it reloads the tableView all at once at the end. I don't have my expected liveUpdate which i'm searching for. The intervall the method is called is about 0.001 to 0.0025 seconds. Any ideas to fix that? Sebastian

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  • textFieldShouldBeginEditing + UIKeyboardWillShowNotification + OS 3.2

    - by user193545
    I have multiple textfields on a UIView. I resign for a previous textField in textFieldShouldBeginEditing method, where following sequence of events are performed UIKeyboardWillHideNotification is received corresponding to that field where the keyboard for the previous field is hidden. the method textFieldShouldBeginEditing returns a YES and then UIKeyboardWillShowNotification is received where the keyboard for the current field is displayed. However, in OS 3.2 even though textFieldShouldBeginEditing returns a YES, UIKeyboardWillShowNotification for the current field is not received. The logic works for OS < 3.2 Any ideas where I might be doing wrong?

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  • How can keep track of the index path of a button in a tableview cell?

    - by Jake
    I have a table view where each cell has a button accessory view. The table is managed by a fatchedresults controller and is frequently reordered. I want to be able to press a button and be able to obtain the index path of the pressed button's tableviewcell. I've been trying to get this working for days by storing the row of the button in it's tag, but when the table get's reordered the row becomes incorrect and I keep failing at reordering the tags correctly when a change is made. Any new ideas on how to keep track of the button's cell's index path? Thanks so much for any help.

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  • How can I make the keyboard disappear after entering the text ?

    - by srikanth rongali
    I have two text fields in my view. I did it using IB. My problems are After entering the text in textField1 I am entering text in textField2. When I click in textField1 again the previous text is disappeared in the textField1. After entering the text in both the textFields, I need the keyboard to disappear. But, even I touched the return key in the keyboard layout or I touched the screen outside the text field the keyboard is not disappearing. How can I make this. Thank you.

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  • Does NSClassFromString affect performance?

    - by Tomen
    I want to create a controller that depends on the class of a given instance of a model -(BaseController *)getControllerForModel:(Model *)model { BaseController *controller = nil; Class controllerClass = [BaseController class]; //the default value //find the right controller if ([model isMemberOfClass:[ModelClass1 class]]) controllerClass = [ConcreteController1 class]; else if ([model isMemberOfClass:[ModelClass2 class]]) controllerClass = [ConcreteController2 class]; else if ([model isMemberOfClass:[ModelClass3 class]]) controllerClass = [ConcreteController3 class]; ... else if ([model isMemberOfClass:[ModelClassX class]]) controllerClass = [ConcreteControllerX class]; else Trace(TRACELEVEL_WARNING, @"Unrecognized model type: %@", NSStringFromClass([model class])); //Now instantiate it with the model controller = [[[controllerClass alloc] initWithModel:model] autorelease]; return slotController; } I want to find a more flexible solution to this and thought of having a dictionary, which maps Model-Classes to Controller-Classes and then NSClassFromString could give me the right instance. My question is this: Is NSClassFromString using much of my applications performance if i use it several times (say, 100 times at once)? Or would it be about as fast as the above approach?

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  • How to fit more operations to tab bar + navigation bar?

    - by Henry
    I want to use Tabview for my whole app. However in certain view, I have more operations than I can fit in the navigator bar. So I thought of using Toolbar but toolbar should be located at the bottom, right? Toolbar looks weird to be on top of the tabview, and hiding tabview for one view doesn't really make sense. I guess I can go with more buttons in the main view, but any other alternatives? What can one use to add more operation(s) to tabview? Thanks

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  • memory leak when removing objects in NSMutableArray

    - by user262325
    Hello everyone I hope to store MYFileObj to NSMutableArray (fileArray) and display data on an UITavleView(tableview). //----------------------------------MYFileObj #import <UIKit/UIKit.h> @interface MYFileObj : NSObject { NSString *fileName; } -(void) setFileName:(NSString *)s ; -(NSString *) fileName ; @end the array I want to store data NSMutableArray *fileArray; I created new object and add to fileArray MYFileObj *newobj=[[MYFileObj alloc] init ]; NSString *ss=[[NSString alloc] initWithFormat:@"%@",path] ; [newobj setFileName:ss]; [ss release]; [fileArray addObject:newobj]; [newobj release]; [atableview reloadData]; After the first time relaodData and do something, I want to reload fileArray and redraw atableview. //code to remove all object in atableview if([fileArray count]>0) { [fileArray removeAllObjects]; [atableview reloadData]; } I notice that there are memory leak. I hope to know the method "removeAllObjects" removes only MYFileObj themselves or also removes MYFileObj's member property "fileName"? Thanks interdev

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  • add different characters to a NSString one by one??

    - by hemant
    i am retrieving different characters from a string by using thsi function and adding 5 to them to display the corresponding character for eg. 'a' displays 'f' and 'h' displays 'm'.. but the problem is that i am not able to add these characters into a string which i can use to display to display like 'fm'...can anyone help?? heres the code strResult(mutablestring) is getting null only. `str=@"John"; int a=[str length]; for(i=0;i char ch=[str characterAtIndex:i]; ch=ch+5; temp=[NSString stringWithFormat:@"%c",ch]; [strResult appendString:temp]; NSLog(@"%c",ch); }`

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  • Big time Leaking in Objective-C Category

    - by Daniel Amitay
    I created a custom NSString Category which lets me find all strings between two other strings. I'm now running into the problem of finding that there are a lot of kBs leaking from my script. Please see code below: #import "MyStringBetween.h" @implementation NSString (MyStringBetween) -(NSArray *)mystringBetween:(NSString *)aString and:(NSString *)bString; { NSAutoreleasePool *autoreleasepool = [[NSAutoreleasePool alloc] init]; NSArray *firstlist = [self componentsSeparatedByString:bString]; NSMutableArray *finalArray = [[NSMutableArray alloc] init]; for (int y = 0; y < firstlist.count - 1 ; y++) { NSString *firstObject = [firstlist objectAtIndex:y]; NSMutableArray *secondlist = [firstObject componentsSeparatedByString:aString]; if(secondlist.count > 1){ [finalArray addObject:[secondlist objectAtIndex:secondlist.count - 1]]; } } [autoreleasepool release]; return finalArray; } @end I admit that I'm not super good at releasing objects, but I had believed that the NSAutoreleasePool handled things for me. The line that is leaking: NSMutableArray *secondlist = [firstObject componentsSeparatedByString:aString]; Manually releasing secondlist raises an exception. Thanks in advance!

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  • How to find an audio file's length (in seconds)

    - by mIL3S
    Hi all! (Objective C) Just using simple AudioServicesPlaySystemSoundID and its counterparts, but I can't find in the documentation if there is already a way to find the length of an audio file. I know there is AudioServicesGetPropertyInfo, but that seems to return a byte-buffer - do audio files embed their length in themselves and I can just extract it with this? Or is there perhaps a formula based on bit-rate * fileSize to convert to length-of-time? mIL3S www.milkdrinkingcow.com

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  • Rewrite C++ code into Objective C

    - by Phil_M
    Hello I got some C++ Sourcecode that I would like to rewrite into Objective C. It would help me alot if someone could write me a header file for this Code. When I get the Headerfile I would be able to rewrite the rest of the Sourcecode. It would be very nice if someone could help me please. Thanks I will poste the sourcecode here: #include <stdlib.h> #include <iostream.h> #define STATES 5 int transitionTable[STATES][STATES]; // function declarations: double randfloat (void); int chooseNextEventFromTable (int current, int table[STATES][STATES]); int chooseNextEventFromTransitionTablee (int currentState); void setTable (int value, int table[STATES][STATES]); ////////////////////////////////////////////////////////////////////////// int main(void) { int i; // for demo purposes: transitionTable[0][0] = 0; transitionTable[0][1] = 20; transitionTable[0][2] = 30; transitionTable[0][3] = 50; transitionTable[0][4] = 0; transitionTable[1][0] = 35; transitionTable[1][1] = 25; transitionTable[1][2] = 20; transitionTable[1][3] = 30; transitionTable[1][4] = 0; transitionTable[2][0] = 70; transitionTable[2][1] = 0; transitionTable[2][2] = 15; transitionTable[2][3] = 0; transitionTable[2][4] = 15; transitionTable[3][0] = 0; transitionTable[3][1] = 25; transitionTable[3][2] = 25; transitionTable[3][3] = 0; transitionTable[3][4] = 50; transitionTable[4][0] = 13; transitionTable[4][1] = 17; transitionTable[4][2] = 22; transitionTable[4][3] = 48; transitionTable[4][4] = 0; int currentState = 0; for (i=0; i<10; i++) { std::cout << currentState << " "; currentState = chooseNextEventFromTransitionTablee(currentState); } return 0; }; ////////////////////////////////////////////////////////////////////////// ////////////////////////////// // // chooseNextEventFromTransitionTable -- choose the next note. // int chooseNextEventFromTransitionTablee(int currentState) { int targetSum = 0; int sum = 0; int targetNote = 0; int totalevents = 0; int i; currentState = currentState % STATES; // remove any octave value for (i=0; i<STATES; i++) { totalevents += transitionTable[currentState][i]; } targetSum = (int)(randfloat() * totalevents + 0.5); while (targetNote < STATES && sum+transitionTable[currentState][targetNote] < targetSum) { sum += transitionTable[currentState][targetNote]; targetNote++; } return targetNote; } ////////////////////////////// // // randfloat -- returns a random number between 0.0 and 1.0. // double randfloat(void) { return (double)rand()/RAND_MAX; } ////////////////////////////// // // setTable -- set all values in the transition table to the given value. // void setTable(int value, int table[STATES][STATES]) { int i, j; for (i=0; i<STATES; i++) { for (j=0; j<STATES; j++) { table[i][j] = value; } } }

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  • imagePickerController won't return camera photo. Will return album photo.

    - by yesimarobot
    i'm loading photos from my library just fine, but photos coming from he camera don't display in the imageView. I've used CFShow(info) and the data from the camera is not nil... - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { UIImage *image = [info objectForKey:@"UIImagePickerControllerEditedImage"]; [self.imageView setImage:image]; [self dismissModalViewControllerAnimated:YES]; [picker release]; }

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  • Stop lazy-loading images?

    - by Greg
    Here's the issue – I followed along with the Apple lazy-load image sample code to handle my graphical tables. It works great. However, my lazy-load image tables are being stacked within a navigation controller so that you can move in and out of menus. While all this works, I'm getting a persistent crash when I move into a table then move immediately back out of it using the "back" button. This appears to be a result of the network connections loading content not being closed properly, or calling back to their released delegates. Now, I've tried working through this and carefully setting all delegates to nil and calling close on all open network connections before releasing a menu. However, I'm still getting the error. Also – short posting my entire application code into this post, I can't really post a specific code snippet that illustrates this situation. I wonder if anyone has ideas for tasks that I may be missing? Do I need to do anything to close a network connection other than closing it and setting it to nil? Also, I'm new to debugging tools – can anyone suggest a good tool to use to watch network connections and see what's causing them to fail? Thanks!

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  • Clear button at uisearchbar not working at all

    - by kevin.ng
    I created a search bar programmatically and added to my view using the codes below: - (void)viewDidLoad { searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(xPositionForSearchBar, yPositionForSearchBar, widthForSearchBar, heightForSearchBar)]; UIView *bg = [[searchBar subviews] objectAtIndex:0]; searchBar.delegate = self; searchBar.placeholder = @"Search record"; for(UIView *view in searchBar.subviews){ if([view isKindOfClass:[UITextField class]]){ UITextField *tf = (UITextField *)view; tf.delegate = self; break; } } [bg removeFromSuperview]; [self.view addSubview: searchBar]; } The code is implemented with UISearchBarDelegate and UITextFieldDelegate. I have tried using - (void)searchBarCancelButtonClicked:(UISearchBar *)aSearchBar { NSLog(@"cancel clicked"); searchBar.text = @""; [aSearchBar resignFirstResponder]; } - (BOOL)textFieldShouldClear:(UITextField *)textField { NSLog(@"clear"); [self performSelector:@selector(searchBarCancelButtonClicked:) withObject:searchBar afterDelay: 0.1]; return YES; } and yet, the text inside the searchBar is not cleared at all when i click on the "clear button" - a circle with a "X" inside. The clear button works when I implemented it in IB. Wonder why? Kindly advice, many thanks.

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  • iPodMusicPlayer doesn't send notifications, if it is created in background

    - by Aleksejs
    If iPodMusicPlayer is created in background, then I doesn't send notifications about playback state changes. Here is code: - (void)initMusicPlayer { musicPlayer = [MPMusicPlayerController iPodMusicPlayer]; NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter]; [notificationCenter addObserver:self selector:@selector(musicPlayerStateChanged:) name:MPMusicPlayerControllerNowPlayingItemDidChangeNotification object:musicPlayer]; [notificationCenter addObserver:self selector:@selector(musicPlayerStateChanged:) name:MPMusicPlayerControllerPlaybackStateDidChangeNotification object:musicPlayer]; [musicPlayer beginGeneratingPlaybackNotifications]; } - (void)viewDidLoad { [self performSelectorInBackground:@selector(initMusicPlayer) withObject:nil]; } Is there some way how to create iPodMusicPlayer in background? Otherwise if it is created on the main thread, it blocks executions for a while.

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  • can we use timer in taps??

    - by user317149
    i m working on app,in which user taps to shoot bullets, i want user to restrict their taps, like he next tap or touch should be counted after 1 or 3 seconds, is their any snippet,i can use to rtestrict user for continiously tapoping/touch? quick reply is aleways appreciated/ regards shishir

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  • A question related to UITextfield

    - by user217572
    I have UITextfiled created dynamically by code I want to move keyboard up on click of UITextfield It should be set wether the return button of UITextfield press or not? and also it will be set whenever i move from portrait to landscape or landscape to portrait mode

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  • @property, ok in this situation?

    - by fuzzygoat
    I am still finding my feet with objective-c and was wondering if its acceptable to use @property on the two objects below. #import <UIKit/UIKit.h> #import <MapKit/MapKit.h> @interface MapViewController : UIViewController <MKMapViewDelegate, CLLocationManagerDelegate> { CLLocationManager *locationManager; IBOutlet MKMapView *googleMapView; } @property(nonatomic, retain) CLLocationManager *locationManager; @property(nonatomic, retain) MKMapView *googleMapView; @end One of my reasons for using them is so that I can use the setters in my viewDidUnload, I seem to be using @property a lot and was just wondering if the use in this situation is acceptable? -(void)viewDidUnload { [self setLocationManager:nil]; [self setGoogleMapView:nil]; [super viewDidUnload]; } much appreciated Gary

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