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  • Mixing two wav music files of different size

    - by iphoneDev
    Hi, I want to mix audio files of different size into a one single .wav file. There is a sample through which we can mix files of same size [(http://www.modejong.com/iOS/#ex4 )(Example 4)]. I modified the code to get the mixed file as a .wav file. But I am not able to understand that how to modify this code for unequal sized files. If someone can help me out with some code snippet,i'll be really thankful.

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  • MPMediaickerController memory leak identified by Leaks instrument

    - by Joe
    This is code from Apple's Addmusic example. MPMediaPickerController *picker = [[MPMediaPickerController alloc] initWithMediaTypes: MPMediaTypeMusic]; picker.delegate = self; picker.allowsPickingMultipleItems = YES; picker.prompt = NSLocalizedString (@"Add songs to play", "Prompt in media item picker"); // The media item picker uses the default UI style, so it needs a default-style // status bar to match it visually [[UIApplication sharedApplication] setStatusBarStyle: UIStatusBarStyleDefault animated: YES]; [self presentModalViewController: picker animated: YES]; [picker release]; I'm using this code in my app and the Leaks instrument highlights a leak on the line: [self presentModalViewController: picker animated: YES]; I think that this is because this line retains a reference to picker which cannot be subsequently released. Is there any way around this or is Leaks incorrectly identifying a leak?

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  • Method in RootViewController not Storing Array

    - by Antonio
    I have an array initialized in my RootViewController and a method that addsObjects to an array. I created a RootViewController object in my SecondViewController. The method runs (outputs a message) but it doesn't add anything to the array, and the array seems empty. Code is below, any suggestions? RootViewController.h #import "RootViewController.h" #import "SecondViewController.h" @implementation RootViewController - (void)viewDidLoad { [super viewDidLoad]; myArray2 = [[NSMutableArray alloc] init]; NSLog(@"View was loaded"); } -(void)addToArray2{ NSLog(@"Array triggered from SecondViewController"); [myArray2 addObject:@"Test"]; [self showArray2]; } -(void)showArray2{ NSLog(@"Array Count: %d", [myArray2 count]); } -(IBAction)switchViews{ SecondViewController *screen = [[SecondViewController alloc] initWithNibName:nil bundle:nil]; screen.modalTransitionStyle = UIModalTransitionStyleCoverVertical; [self presentModalViewController:screen animated:YES]; [screen release]; } SecondViewController.m #import "SecondViewController.h" #import "RootViewController.h" @implementation SecondViewController -(IBAction)addToArray{ RootViewController *object = [[RootViewController alloc] init]; [object addToArray2]; } -(IBAction)switchBack{ [self dismissModalViewControllerAnimated:YES]; } EDIT***** With Matt's code I got the following error: " expected specifier-qualifier-list before 'RootViewController' "

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  • Is there a leak in this copy code?

    - by Don Wilson
    Is there a leak in this code? // Move the group Group *movedGroup = [[Group alloc] init]; movedGroup = [[[[GroupList sharedGroupList] groups] objectAtIndex:fromIndex] copy]; [[GroupList sharedGroupList] deleteGroup:fromIndex]; [[GroupList sharedGroupList] insertGroup:movedGroup atIndex:toIndex]; // Update the loadedGroupIndex pointer if (loadedGroupIndex < fromIndex & loadedGroupIndex >= toIndex) { loadedGroupIndex = loadedGroupIndex + 1; } else if (loadedGroupIndex > fromIndex & loadedGroupIndex < toIndex) { loadedGroupIndex = loadedGroupIndex - 1; } else if (loadedGroupIndex == fromIndex) { loadedGroupIndex = toIndex; } [movedGroup release]

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  • release viewcontroller after presenting modally

    - by Jonathan
    I was watching CS193P Stanford course on Itunes, and in one of the lectures a demo was given and There it was said you could present the viewcontroller modally and then release it. Roughly like this (I know this isn't perfect but I'm on my PC atm) [self.view presentcontentmodally:myVC] [myVC release]; However this seems to produce problems. If I put a NSLog(@"%d", [myVC retainCount]) between those two lines then it returns 2 implying it is ok to release. However when I dismiss the myVC the app crashes. Nothing in the NSlog and the debugger won't show where it stopped. But I used malloc-history or something that some blog said would help. And found that it was the myVC. So should I be releasing myVC? (also when the modalVC has been dissmissed should the app's memory usuage go back to before the modalVC was presented?)

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  • Array passing between classes, gone?

    - by Kenneth
    Hey guys . i have two classes, SelectionScreenTable & GraphView. In the SelectionScreenTable class .h, i declared a NSMutableArray called usagedatas NSMutableArray *usagedatas; } @property (nonatomic, retain) NSMutableArray *usagedatas; In the SelectionScreenTable class.m i remembered to @synthesize. Later on, while processing my methods, i did a NSLog(@"usagedatas count:%i",usagedatas.count); to check whether it has value and it returned 1. so yeah its good up to this point. And in the -(void) dealloc , i remembered to released it . [usagedatas release]; So now comes ME trying to use it in another class. In GraphView.m i imported the "SelectionScreenTable.h". in the -(void)viewDidLoad i did SelectionScreenTable *UD = [SelectionScreenTable alloc]; NSLog(@"GraphView UD.usagedataas.count = :%i",UD.usagedatas.count); it returned 0. Any idea guys?

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  • UISearchbar issue

    - by hmthur
    I am trying to add a UISearchbar to table header view. I have the icon in nib and have connected the outlets. Now in viewDidLoad, I am writing self.tableView.tableHeaderView = searchbar If i create a local var inside viewDidLoad, it shows up. But not the outlet or ivar one. But for some reason, the UISearchbar does not get displayed in the table. I am not sure what the issue is. Can a UISearchbar not be set in viewDidLoad OR is it something else? Please help.

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  • Scroll view to bottom while keyboard is hiding

    - by Manu
    Hi! I'm using a scroll view to move my view and show certain text fields (that otherwise would be hidden) when the keyboard shows. I basically resize the scroll view to make room for the keyboard, and then scroll up the view smoothly with "scrollRectToVisible", which works perfectly. After that, I can scroll and edit the rest of the text fields without lowering the keyboard, which is what I intend. The problem comes when I want to hide the keyboard again. I have been able to lower the keyboard and scroll down the view to its original position without a problem, but I have been unable to make that transition smooth. At the moment I use the following: - (void)keyboardWillHide: (NSNotification *)notif { CGRect topRect = CGRectMake(0, 0, 1, 1); [scrollview scrollRectToVisible:topRect animated:YES]; scrollview.frame = CGRectMake(0, 0, scrollviewWidth, scrollviewHeight); } I create a CGRect at the top, which I then move into view with "scrollRectToVisible". That works fine and commences the scrolling right when the keyboard is hiding (I use "keyboardWillHide" and not "keyboardDidHide" because the scroll view frame is still missing its lower part). The problem comes when I resize the scroll view frame back to its original dimensions (which I need to do), because then the scrolling is interrupted and the view drops to the bottom suddenly (as there is nothing else to scroll). This causes a glitch, which is why I cannot complete the transition smoothly. Any ideas on how could I lower the keyboard while scrolling the view down smoothly? Should I be scrolling up a bigger view, instead of resizing it? That way I would not have to restore the scroll view frame dimensions when lowering the keyboard, or would I? Thanks very much 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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  • Evaluating server certificate

    - by Raven
    Hi, How can I detect a self signed certificate from a revoked or expired ones? I'm using NSURLConnection and implementing connection:didReceiveAuthenticationChallenge: on delegate: - (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge{ if ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]){ NSURLProtectionSpace *tmpSpace=[challenge protectionSpace]; SecTrustRef currentServerTrust=[tmpSpace serverTrust]; SecTrustResultType trustResult; OSStatus err = SecTrustEvaluate(currentServerTrust, &trustResult); BOOL trusted = (err == noErr) && ((trustResult == kSecTrustResultProceed) || (trustResult == kSecTrustResultUnspecified)); if (trusted){ // Do something } } } Currently the "if (trusted){}" block only work for certificates trusted by iOS, I want it to work for others as well, but only if the certificate isn't revoked or expired. The documentation is using SecTrustSettingsSetTrustSettings for changing the settings and reevaluate the trust. but I couldn't find this method (or the SecTrustSetting) for iOS, only for Mac. Thanks

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  • in playgame button Game Get freezed

    - by bmindhacker
    Hey guys i have done a game in cocos2d.And now i am stuck .i have a menu scene and a game scene. In menu scene i have a button named "Play Game". when i press this button game starts perfectly after game over i have a button named "Go back to main menu" that is used to take back to main menu scene now after game over when i click "PlayGame" button game does not perform any action and get freeze. please please help me guys i will be really thankful to you.

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  • IOS SDK : first advices for beginners

    - by VdesmedT
    I too often answer the same kind of questions regarding basic topics like memory management, UITableView, Interface Orientation, MVC, etc... I understand very well that everyone starting with that SDK is too exited about getting its hand on it but a few reading would save them hours of debugging and the frustration that come along with the feeling that "We miss something here". I'd like experience users to share the few small articles, white papers, docs, book chapters that helps other save their time and avoid frustration. My first vote would be for : IOS Memory Management Guide View Controller Programming Guide Table View Guide And as a General recommendation, read the Overview section that come along with every class documention in the reference library, they contains most of what you need to know to avoid big traps !

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  • Weird Perspective With CATransform3DMakeRotation

    - by kopproduction
    I'm having an odd problem with CATransform3DMakeRotation. When the rotated view is in the center of the superview, it looks like this: This is how it's supposed to look. However, when it's somewhere else in the superview, say, in the lower left corner, it looks like this: Note that it is tilted to the right. Same thing happens when it's in the lower right corner, only that it tilts to the left. Is there some way to make it tilt the way it should all the time and in every position?

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  • Expected specifier-qualifier-list before 'CGPoint'

    - by Rob
    My project compiles and runs fine unless I try to compile my Unit Test Bundle it bombs out on the following with an "Expected specifier-qualifier-list before 'CGPoint'" error on line 5: #import <Foundation/Foundation.h> #import "Force.h" @interface WorldObject : NSObject { CGPoint coordinates; float altitude; NSMutableDictionary *forces; } @property (nonatomic) CGPoint coordinates; @property (nonatomic) float altitude; @property (nonatomic,retain) NSMutableDictionary *forces; - (void)setObject:(id)anObject inForcesForKey:(id)aKey; - (void)removeObjectFromForcesForKey:(id)aKey; - (id)objectFromForcesForKey:(id)aKey; - (void)applyForces; @end I have made sure that my Unit Test Bundle is a target of my WorldObject.m and it's header is imported in my testing header: #define USE_APPLICATION_UNIT_TEST 1 #import <SenTestingKit/SenTestingKit.h> #import <UIKit/UIKit.h> #import "Force.h" #import "WorldObject.h" @interface LogicTests : SenTestCase { Force *myForce; WorldObject *myWorldObject; } @end

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  • How do you check to see if a variable has changed every second or less in objective c?

    - by James
    I am using an if statement to check the value of a BOOLEAN when i click on a button. When the button is clicked if the value is false i want to display a UIActivityIndicator and if the value is true i want to push the new view. I can do this fine but i want the view to change automatically when the BOOLEAN Becomes true if the user has already clicked the button. So my question is how do you check to see if a value has changed everysecond or less?

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  • How do I change the color of a Cocos2d MenuItem?

    - by Rob Sawyer
    [MenuItemFont setFontSize:20]; [MenuItemFont setFontName:@"Helvetica"]; //I'm trying to change the color of start (below item) MenuItem *start = [MenuItemFont itemFromString:@"Start Game" target:self selector:@selector(startGame:)]; MenuItem *help = [MenuItemFont itemFromString:@"Help" target:self selector:@selector(help:)]; Menu *startMenu = [Menu menuWithItems:start, help, nil]; [startMenu alignItemsVertically]; [self add:startMenu];

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