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  • Custom annotationView images revert to pins when clicked

    - by Danny Tuppeny
    I'm displaying custom images on a map (instead of the default pins) using the code below. However, when I tap on an item (and the callout appears), the image reverts to the default red pin. How can I keep my custom image, even when the callout is displayed? - (MKAnnotationView *) mapView:(MKMapView *)map viewForAnnotation:(id <MKAnnotation>)annotation { MKPinAnnotationView *pinAnnotation = nil; if (annotation != mapView.userLocation) { static NSString *pinID = @"mapPin"; pinAnnotation = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:pinID]; if (pinAnnotation == nil) pinAnnotation = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:pinID] autorelease]; // Set the image pinAnnotation.image = [UIImage imageNamed:@"TestIcon.png"]; // Set ability to show callout pinAnnotation.canShowCallout = YES; // Set up the disclosure button on the right side UIButton *infoButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure]; pinAnnotation.rightCalloutAccessoryView = infoButton; [pinID release]; } return pinAnnotation; [pinAnnotation release]; }

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  • Delay in playing sounds using AVAudioPlayer

    - by iSharreth
    -(IBAction)playSound{ AVAudioPlayer *myExampleSound; NSString *myExamplePath = [[NSBundle mainBundle] pathForResource:@"myaudiofile" ofType:@"caf"]; myExampleSound =[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:myExamplePath] error:NULL]; myExampleSound.delegate = self; [myExampleSound play]; } I want to play a beep sound when a button is clicked. I had used the above code. But it is taking some delay in playing the sound. Anyone please help.

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  • Application with two UITabBarControls

    - by kovpas
    Hello, I want to create an app, whith the following structure: UITabBarController ..UINavigationController ....UITabBarController So, in other words, I want to load first UITabbarController as my main ViewController, that appears on application start, in its' first tab there's a UINavigationController with a table, which shows another UITabBarController by pressing on a table cell. I started Tab Based application, set first tab to UINavigationController, and its ViewController to my TableViewController. I also created second UITabBarController in Interface Builder. Created a separate class for this controller. Everything works fine at start - my first UITabBarController is shown perfectly, but when I'm trying to push my second UITabBarController, using my UINavigationController, it looks like nothing is loaded from a .xib file - there are just an empty TabBar and NavigationBar pushed. Seems, that something is wrong with an architecture, but I can't figure out the problem. Thanks in advance and I'm sorry for my poor English. Please let me know if something is not clear, I'll try to rephrase it :).

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  • Sqlite3 query in objective c

    - by user271753
    -(IBAction)ButtonPressed:(id)sender { const char *sql = "SELECT AccessCode FROM UserAccess"; NSString *sqlns; sqlns = [NSString stringWithUTF8String:sql]; if([Password.text isEqual:sqlns]) { NSLog(@"Correct"); } else { NSLog(@"Wrong"); } NSLog(@"%@",sqlns); } Noob here , At NSLog I am able to print "SELECT AccessCode FROM UserAccess" where as let say the access code is 1234 , which I want . In the appdelegate I Have : /// - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after app launch [self createEditableCopyOfDatabaseIfNeeded]; [window addSubview:viewController.view]; [window makeKeyAndVisible]; return YES; } /// - (void)createEditableCopyOfDatabaseIfNeeded { NSLog(@"Creating editable copy of database"); // First, test for existence. BOOL success; NSFileManager *fileManager = [NSFileManager defaultManager]; NSError *error; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *writableDBPath = [documentsDirectory stringByAppendingPathComponent:@"UserAccess.sqlite"]; success = [fileManager fileExistsAtPath:writableDBPath]; if (success) return; // The writable database does not exist, so copy the default to the appropriate location. NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"UserAccess.sqlite"]; success = [fileManager copyItemAtPath:defaultDBPath toPath:writableDBPath error:&error]; if (!success) { NSAssert1(0, @"Failed to create writable database file with message '%@'.", [error localizedDescription]); } } /// +(sqlite3 *) getNewDBConnection{ sqlite3 *newDBconnection; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *path = [documentsDirectory stringByAppendingPathComponent:@"UserAccess.sqlite"]; // Open the database. The database was prepared outside the application. if (sqlite3_open([path UTF8String], &newDBconnection) == SQLITE_OK) { NSLog(@"Database Successfully Opened :) "); } else { NSLog(@"Error in opening database :( "); } return newDBconnection; } Please help :(

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  • UIImage color changing?

    - by senthilmuthu
    hi, how can i change the UIImage's Color through Programming,any help pls?if i send UIImage, its color must be changed ..any help please? if i change rgb color like the following through bitmaphandling it did not work.i have given blackcolor's RGB value like 0,0,0.....

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  • Turn a page (a UIWebView) with an animation

    - by Stefan
    Hi, I have a webview, which shows the pages of a ebook. I want to switch from one page to the next page with a page curl animation. By now, I'm know how to switch the page and how to apply a page curl animation on the webview. But how do I apply the curl animation in a way that it looks like flipping from one page to another?

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  • Creating a common selector class with UITableView or UIPicker

    - by trevrosen
    I have several places in my app where I need to select a Foo for further processing from a list of Foo objects. I'd like to do this as a modal view, but neither UIPicker nor UITableView seems to lend itself to the standard approach, since the usual way to do a modal view controller involves setting the parent view controller up as the delegate, and both of those classes need to implement data source protocols, etc. Implementing the data source and selection protocol methods in my parent view controller defeats the purpose of trying to use one common class for implementing this modal selector screen all over my app. Does anyone have any solutions to this problem or am I effectively stuck implementing this selector class over and over again?

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  • Timeout a NSThread after a certain amount of time

    - by Zen_silence
    Hello, I have a NSThread that i would like to timeout after a certain amount of time. [NSThread detachNewThreadSelector:@selector(someFuntion) toTarget:self withObject:nil]; - (void) someFunction { //Some calculation that might take a long time. //if it takes more then 10 seconds i want it to end and display a error message } Any help you can provide on this would be greatly appreciated. Thanks, Zen_silence

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  • cannot convert 'b2PolygonShape' to 'objc_object*' in argument passing

    - by GONeale
    Hey there, I am not sure if many of you are familiar with the box2d physics engine, but I am using it within cocos2d and objective c. This more or less could be a general objective-c question though, I am performing this: NSMutableArray *allShapes = [[NSMutableArray array] retain]; b2PolygonShape shape; .. .. [allShapes addObject:shape]; and receiving this error on the addObject definition on build: cannot convert 'b2PolygonShape' to 'objc_object*' in argument passing So more or less I guess I want to know how to add a b2PolygonShape to a mutable array. b2PolygonShape appears to just be a class, not a struct or anything like that. The closest thing I could find on google to which I think could do this is described as 'encapsulating the b2PolygonShape as an NSObject and then add that to the array', but not sure the best way to do this, however I would have thought this object should add using addObject, as some of my other instantiated class objects add to arrays fine. Is this all because b2PolygonShape does not inherit NSObject at it's root? Thanks

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  • How to tell a rightCalloutAccessoryView has been touched for MapKit

    - by iamdadude
    I have a MKAnnotationView being allocated with a DetailDisclosure button being displayed on the right side of the annotation. How would I go about knowing when a user clicked on the annotation button? This is what my code looks like right now - UIButton *rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure]; pinView.rightCalloutAccessoryView = rightButton; pinView.animatesDrop = YES; Is there a built in method to detect when a accessory view has been touched? I'm guessing it would be like the UITableView methods, but I can't find anything. Thanks for any help.

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  • Finding out estimated duration of a stream using Core Audio

    - by Reflog
    I am streaming a MP3 over network using custom feeding code, not AVAudioPlayer (which only works with URLs) using APIs like AudioFileStreamOpen and etc. Is there any way to estimate a length of the stream? I know that I can get a 'elapsed' property using: if(AudioQueueGetCurrentTime(queue.audioQueue, NULL, &t, &b) < 0) return 0; return t.mSampleTime / dataFormat.mSampleRate; But what about total duration to create a progress bar? Is that possible?

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  • Asynchronous callback for network in Objective-C Iphone

    - by vodkhang
    I am working with network request - response in Objective-C. There is something with asynchronous model that I don't understand. In summary, I have a view that will show my statuses from 2 social networks: Twitter and Facebook. When I clicked refresh, it will call a model manager. That model manager will call 2 service helpers to request for latest items. When 2 service helpers receive data, it will pass back to model manager and this model will add all data into a sorted array. What I don't understand here is that : when response from social networks come back, how many threads will handle the response. From my understanding about multithreading and networking (in Java), there must have 2 threads handle 2 responses and those 2 threads will execute the code to add the responses to the array. So, it can have race condition and the program can go wrong right? Is it the correct working model of iphone objective-C? Or they do it in a different way that it will never have race condition and we don't have to care about locking, synchronize? Here is my example code: ModelManager.m - (void)updateMyItems:(NSArray *)items { self.helpers = [self authenticatedHelpersForAction:NCHelperActionGetMyItems]; for (id<NCHelper> helper in self.helpers) { [helper updateMyItems:items]; // NETWORK request here } } - (void)helper:(id <NCHelper>)helper didReturnItems:(NSArray *)items { [self helperDidFinishGettingMyItems:items callback:@selector(model:didGetMyItems:)]; break; } } // some private attributes int *_currentSocialNetworkItemsCount = 0; // to count the number of items of a social network - (void)helperDidFinishGettingMyItems:(NSArray *)items { for (Item *item in items) { _currentSocialNetworkItemsCount ++; } NSLog(@"count: %d", _currentSocialNetworkItemsCount); _currentSocialNetworkItemsCount = 0; } I want to ask if there is a case that the method helperDidFinishGettingMyItems is called concurrently. That means, for example, faceboook returns 10 items, twitter returns 10 items, will the output of count will ever be larger than 10? And if there is only one single thread, how can the thread finishes parsing 1 response and jump to the other response because, IMO, thread is only executed sequently, block of code by block of code

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  • Using kEAGLRenderingAPIOpenGLES2 causes bad access in glMatrixMode

    - by hyn
    I am trying to use the ES 2 API in my app but using kEAGLRenderingAPIOpenGLES2 causes bad access at glMatrixMode(). There is a similar question here but doesn't answer my question. If I use kEAGLRenderingAPIOpenGLES1 then everything is fine. I could reproduce the same problem with Apple's sample code. What can I do to make glMatrixMode() work in ES 2?

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  • Change (not init) a UIBarButtonItem identifier programatically?

    - by Nebs
    In IB I can set the identifier of a UIBarButtonItem to 'play' which adds an image of a play button (right-pointing triangle). Is there a way to change this image programatically? I want to change it to 'pause' when the play button is pressed. I know you can initialize a UIBarButtonItem with an identifier but I've yet to find a way to change it after it's been initialized. Is this even possible? The only thing I can think of is to remove the old button and initialize a new one in its place, but this hardly seems efficient. Any thoughts?

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  • How to display user location in mapkit?

    - by 4thSpace
    I'd like to display the blue pulsing dot for a user's location. I'm doing this: - (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{ //some other stuff here [self.mapView setShowsUserLocation:YES]; } But I eventually get -[MKUserLocation establishment]: unrecognized selector sent to instance 0x125e90 Should I be doing this some other way?

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  • Xcode - some variables don't show

    - by Mike
    This picture shows a debugging session. "lista" is a NSMutableArray containing, in this case, two elements: 0 and 1. Each element's content is seen on the debugging window as {(unichar *)Xcode_CFStringSummary($VAR, $ID)}:s but if I double click on any element, its value shows on a pop up window. Why is the values don't showing directly? How to force Xcode to show the values instead of this stupid and useless "{(unichar *)Xcode_CFStringSummary($VAR, $ID)}:s" ? thanks for any help.

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  • Split NSData objects into other NSData objects with a given size

    - by Cedric Vandendriessche
    I'm having an NSData object of approximately 1000kb big. Now I want to transfer this via bluetooth. This would be better if I have let's say 10 objects of 100kb. It comes to mind that I should use the -subdataWithRange: method of NSData. I haven't really worked with NSRange. Well I know how it works, but then to read from a given location with the length: 'to end of file'... I've no idea how to do that. Some code on how to split this into multiple 100kb NSData objects would really help me out here. (it probably involves the length method to see how many objects should be made..?) Thank you in advance.

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  • iPhone Title and Subtitle in Navigation Bar

    - by Reuven
    Hi there, In my application, I'd like to have the navigation bar display a title and subtitle. To that extent, I added the following code to my view controller: // Replace titleView CGRect headerTitleSubtitleFrame = CGRectMake(0, 0, 200, 44); UIView* _headerTitleSubtitleView = [[[UILabel alloc] initWithFrame:headerTitleSubtitleFrame] autorelease]; _headerTitleSubtitleView.backgroundColor = [UIColor clearColor]; _headerTitleSubtitleView.autoresizesSubviews = YES; CGRect titleFrame = CGRectMake(0, 2, 200, 24); UILabel *titleView = [[[UILabel alloc] initWithFrame:titleFrame] autorelease]; titleView.backgroundColor = [UIColor clearColor]; titleView.font = [UIFont boldSystemFontOfSize:20]; titleView.textAlignment = UITextAlignmentCenter; titleView.textColor = [UIColor whiteColor]; titleView.shadowColor = [UIColor darkGrayColor]; titleView.shadowOffset = CGSizeMake(0, -1); titleView.text = @""; titleView.adjustsFontSizeToFitWidth = YES; [_headerTitleSubtitleView addSubview:titleView]; CGRect subtitleFrame = CGRectMake(0, 24, 200, 44-24); UILabel *subtitleView = [[[UILabel alloc] initWithFrame:subtitleFrame] autorelease]; subtitleView.backgroundColor = [UIColor clearColor]; subtitleView.font = [UIFont boldSystemFontOfSize:13]; subtitleView.textAlignment = UITextAlignmentCenter; subtitleView.textColor = [UIColor whiteColor]; subtitleView.shadowColor = [UIColor darkGrayColor]; subtitleView.shadowOffset = CGSizeMake(0, -1); subtitleView.text = @""; subtitleView.adjustsFontSizeToFitWidth = YES; [_headerTitleSubtitleView addSubview:subtitleView]; _headerTitleSubtitleView.autoresizingMask = (UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin); self.navigationItem.titleView = _headerTitleSubtitleView; And also implemented a method: -(void) setHeaderTitle:(NSString*)headerTitle andSubtitle:(NSString*)headerSubtitle { assert(self.navigationItem.titleView != nil); UIView* headerTitleSubtitleView = self.navigationItem.titleView; UILabel* titleView = [headerTitleSubtitleView.subviews objectAtIndex:0]; UILabel* subtitleView = [headerTitleSubtitleView.subviews objectAtIndex:1]; assert((titleView != nil) && (subtitleView != nil) && ([titleView isKindOfClass:[UILabel class]]) && ([subtitleView isKindOfClass:[UILabel class]])); titleView.text = headerTitle; subtitleView.text = headerSubtitle; } Things work beautifully, thanks. Except that when rotating the iPhone to Landscape, the title+subtitle don't downsize in an automatic manner like the default title of the navigation item. Any pointers? Thanks!

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  • Memory management in objective-c

    - by prathumca
    I have this code in one of my classes: - (void) processArray { NSMutableArray* array = [self getArray]; . . . [array release]; array = nil; } - (NSMutableArray*) getArray { //NO 1: NSMutableArray* array = [[NSMutableArray alloc]init]; //NO 2: NSMutableArray* array = [NSMutableArray array]; . . . return array; } NO 1: I create an array and return it. In the processArray method I release it. NO 2: I get an array by simply calling array. As I'm not owner of this, I don't need to release it in the processArray method. Which is the best alternative, NO 1 or NO 2? Or is there a better solution for this?

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  • Converting NSDecimalNumber to NSString

    - by 4thSpace
    I'm retrieving a key from an object that looks like this: po obj { TypeID = 3; TypeName = Asset; } The key value is being retrieved like this: NSString *typeId = (NSString*)[obj objectForKey:@"TypeID"]; Rather than typeId being an NSString, it is an NSDecimalNumber. Why is that? How do I convert it to an NSString?

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  • touchEvent in UIScrollview?

    - by senthilmuthu
    i am using ScrollviewDelegate Protocol in viewcontroller.but i am using Custom UIView(UIImageview)in that custom view touch began, touch ended is working ,but touchMoved is not called.how can i achieve this one?

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  • iPhone UIWebView: loadData does not work with certain types (Excel, MSWord, PPT, RTF)

    - by Thomas Tempelmann
    My task is to display the supported document types on an iPhone with OS 3.x, such as .pdf, .rtf, .doc, .ppt, .png, .tiff etc. Now, I have stored these files only encrypted on disk. For security reasons, I want to avoid storing them unencrypted on disk. Hence, I prefer to use loadData:MIMEType:textEncodingName:baseURL: instead of loadRequest: to display the document because loadData allows me to pass the content in a NSData object, i.e. I can decrypt the file in memory and have no need to store it on disk, as it would be required when using loadRequest. The problem is that loadData does not appear to work with all file types: Testing shows that all picture types seem to work fine, as well as PDFs, while the more complex types don't. I get a errors such as: NSURLErrorDomain Code=100 NSURLErrorDomain Code=102 WebView appears to need a truly working URL for accessing the documents as a file, despite me offering all content via the NSData object already. Here's the code I use to display the content: [webView loadData:data MIMEType:type textEncodingName:@"utf-8" baseURL:nil]; The mime-type is properly set, e.g. to "application/msword" for .doc files. Does anyone know how I could get loadData to work with all types that loadRequest supports? Or, alternatively, is there some way I can tell which types do work for sure (i.e. officially sanctioned by Apple) with loadData? Then I can work twofold, creating a temp unencrypted file only for those cases that loadData won't like. Update Looks like I'm not the first one running into this. See here: http://osdir.com/ml/iPhoneSDKDevelopment/2010-03/msg00216.html So, I guess, that's the status quo, and nothing I can do about it. Someone suggested a work-around which might work, though: http://osdir.com/ml/iPhoneSDKDevelopment/2010-03/msg00219.html Basically, the idea is to provide a tiny http server that serves the file (from memory in my case), and then use loadRequest. This is probably a bit more memory-intensive, though, as both the server and the webview will probably both hold the entire contents in memory as two copies then, as opposed to using loadData, where both would rather share the same data object. (Mind you, I'll have to hold the decrypted data in memory, that's the whole point here).

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  • How to set the tableview's top using contentinset property while being at the bottom of the table

    - by neha
    Hi all, I'm having a tableview with 20 rows and 250 as their rowheight. While I'm at the bottom of the tableview, I want to shift the tableview upwards by 65px. I tried doing self.tableView.contentInset = UIEdgeInsetsMake(-65.0f, 0.0f, 0.0f, 0.0f); Also self.tableView.contentInset = UIEdgeInsetsMake((4633.0f - 65.0f), 0.0f, 0.0f, 0.0f); where 4633.0f is my contentoffset.y, but with no success. When the last cell is pulled upwards, I'm showing a view below the last cell with an activity indicator on it to depict that more data is getting loaded. I need to keep that view visible for 2 seconds so I want to push the tableview cells up and after that I want to bring the tableview to its original position and reset the view below that. I'm doing this [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:0.2]; // self.tableView.contentInset = UIEdgeInsetsMake((4633.0f - 65.0f), 0.0f, 0.0f, 0.0f); self.tableView.contentInset = UIEdgeInsetsMake(- 65.0f, 0.0f, 0.0f, 0.0f); [UIView commitAnimations]; and then calling a function to reset it back as self.tableView.contentInset = UIEdgeInsetsMake(0.0f, 0.0f, 0.0f, 0.0f); Can anybody please suggest how to do it? Thanx in advance.

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