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  • Cocoa Interface Builder object initialization

    - by Stanley
    Base on the documentation and sample code that I have gone through, I got an impression that when a class defined in xcode is read into and configured in Interface Builder, an object based on the class is effectively created and stored in an xib or nib file. So the object is ready to be used when the corresponding application is launched. Alternatively, for classes that have not been handled by Interface Builder, code such as the "new" statements have to be written in xcode explicitly in order for the associated objects to be created and used. It will be very nice to have people who are more knowledgable than me to confirm or to correct my very naive understanding of Interface Builder ...

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  • Global NSMutableArray doesn't seem to be holding values

    - by diatrevolo
    I have a Cocos2D iPhone application that requires a set of CGRects overlaid on an image to detect touches within them. "Data" below is a class that holds values parsed from an XML file. "delegateEntries" is a NSMutableArray that contains several "data" objects, pulled from another NSMutableArray called "entries" that lives in the application delegate. For some strange reason, I can get at these values without problems in the init function, but further down the class in question, I try to get at these values, and the application crashes without an error message (as an example, I put in the "ccTouchBegan" method which accessess this data through the "populateFieldsForTouchedItem" method. Can anyone see why these values would not be accessible from other methods? No objects get released until dealloc. Thanks in advance! @synthesize clicked, delegate, data, image, blurImage, normalImage, arrayOfRects, delegateEntries; - (id)initWithTexture:(CCTexture2D *)aTexture { if( (self=[super initWithTexture:aTexture] )) { arrayOfRects = [[NSMutableArray alloc] init]; delegateEntries = [[NSMutableArray alloc] init]; delegate = (InteractivePIAppDelegate *)[[UIApplication sharedApplication] delegate]; delegateEntries = [delegate entries]; data = [delegateEntries objectAtIndex:0]; NSLog(@"Assigning %@", [[delegateEntries objectAtIndex:0] backgroundImage]); NSLog(@"%@ is the string", [[data sections] objectAtIndex:0]); //CGRect rect; NSLog(@"Count of array is %i", [delegateEntries count]); //collect as many items as there are XML entries for(int i=0; i<[delegateEntries count]; i++) { if([[delegateEntries objectAtIndex:i] xPos]) { NSLog(@"Found %i items", i+1); [arrayOfRects addObject:[NSValue valueWithCGRect:CGRectMake([[[delegateEntries objectAtIndex:i] xPos] floatValue], [[[delegateEntries objectAtIndex:i] yPos] floatValue], [[[delegateEntries objectAtIndex:i] xBounds] floatValue], [[[delegateEntries objectAtIndex:i] yBounds] floatValue])]]; } else { NSLog(@"Nothing"); } } //remove the following once the NSMutableArray from above works (legacy) blurImage = [[NSString alloc] initWithString:[data backgroundBlur]]; NSLog(@"5"); normalImage = [[NSString alloc] initWithString:[data backgroundImage]]; clicked = NO; } return self; } And then: - (void)populateFieldsForTouchedItem:(TouchedRect)touchInfo { Data *touchDatum = [[Data alloc] init]; touchDatum = [[self delegateEntries] objectAtIndex:touchInfo.recordNumber]; NSLog(@"Assigning %@", [[[self delegateEntries] objectAtIndex:touchInfo.recordNumber] backgroundImage]); rect = [[arrayOfRects objectAtIndex:touchInfo.recordNumber] CGRectValue]; image = [[NSString alloc] initWithString:[[touchDatum sections] objectAtIndex:0]]; [touchDatum release]; } - (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event { TouchedRect touchInfo = [self containsTouchLocation:touch]; NSLog(@"Information pertains to %i", touchInfo.recordNumber); if ( !touchInfo.touched && !clicked ) { //needed since the touch location changes when zoomed NSLog(@"NOPE"); return NO; } [self populateFieldsForTouchedItem:touchInfo]; NSLog(@"YEP"); return YES; }

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  • iPhone audio Filter Question

    - by Joe
    Okay, I am going to try to make this totally not a "plz send teh codez kthxbai" I am considering an app which takes sound (eventually an audio track) and applies an audio filter to it. So I can play sounds with AudioServicesPlaySystemSound via AudioToolbox framework just fine. What I need is a very simple example of how I might take a sound and apply (for instance) midrange boost etc. Actually the kind of alteration is irrelevant -- if I can get my head around how the alteration is done I can figure out the rest. I am just finding both docs and examples of altering audio in code to be very scarce. Thanks for any help!

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  • Layers of Images using UIImageView

    - by Taimur Hamza
    Hi everyone, I just wanted to confirm, is it possible that we add layers of images using UImageView, one as background and other on top of it. I mean i want to use 2 images one has to be in the background and the other on top of it. ( the size of both these images is 320 x 480 ). Through the attributes inspector we cant do it. Is there any we can do it through code. Maybe using subview or something. Thanks Geeks :) Taimur Ajmal

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  • Hiding master view in split view app..???

    - by Mahesh
    Hello friends, I have created split view based ipad app, where master view is table view while Detail view display images.. I need to display the image fit to screen 100% in landscape mode. This could be on button event or double tap event.. Does any one know about it. Thanks in advance.

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  • Error: expected specifier-qualifier-list before 'QTVisualContextRef'

    - by Moonlight293
    Hi everyone, I am currently getting this error message in my header code, and I'm not sure as to why: "Error: expected specifier-qualifier-list before 'QTVisualContextRef'" #import <Cocoa/Cocoa.h> #import <QTKit/QTKit.h> #import <OpenGL/OpenGL.h> #import <QuartzCore/QuartzCore.h> #import <CoreVideo/CoreVideo.h> @interface MyRecorderController : NSObject { IBOutlet QTCaptureView *mCaptureView; IBOutlet NSPopUpButton *videoDevicePopUp; NSMutableDictionary *namesToDevicesDictionary; NSString *defaultDeviceMenuTitle; CVImageBufferRef mCurrentImageBuffer; QTCaptureDecompressedVideoOutput *mCaptureDecompressedVideoOutput; QTVisualContextRef qtVisualContext; // the context the movie is playing in // filters for CI rendering CIFilter *colorCorrectionFilter; // hue saturation brightness control through one CI filter CIFilter *effectFilter; // zoom blur filter CIFilter *compositeFilter; // composites the timecode over the video CIContext *ciContext; QTCaptureSession *mCaptureSession; QTCaptureMovieFileOutput *mCaptureMovieFileOutput; QTCaptureDeviceInput *mCaptureDeviceInput; } @end In the examples I have seen through other code (e.g. Cocoa Video Tutorial) I have not seen any difference in their code to mine. If anyone would be able to point out as to how this error could have occurred that would be great. Thanks heaps! :)

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  • Xcode automatically converts the object to NSArray

    - by Farrukh Javeid
    I have been working on an app and during the development, I am facing a very strange problem. I have a NSMutableArray tempSortedArray, which is full of objects of Store types. All the objects are valid as I can see them in my GUI, the problem arises when I iterate through the array, at index 90, which can be generally anyone, the XCode converts the Store object to NSMutableArray object. Any idea, why this is happening. This is the code to check out what I am doing: NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"cashBack" ascending:NO]; NSArray *sortDescriptors = [NSArray arrayWithObject:sortDescriptor]; NSArray *sortedArray = [storesArray sortedArrayUsingDescriptors:sortDescriptors]; for (int i = 0; i < [tempSortedArray count]; i++) { Store *currentStore = [tempSortedArray objectAtIndex:i]; NSLog(@"store class: %@", [currentStore.class description]); if (currentStore.cashBackTypeString != (id)[NSNull null]) { //do whatever is required to do here }

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  • Editing key inside array item - plist

    - by F0u4d
    I have the following plist: <plist version="1.0"> <dict> <key>General</key> <dict> <key>Table 1</key> <array> <dict> <key>subheadingName</key> <string>Item 1 of table 1</string> <key>subheadingDetail</key> <string>details about item 1</string> </dict> <dict> <key>subheadingName</key> <string>Item 2 of table 1</string> <key>subheadingDetail</key> <string>details about item 2!</string> </dict> <dict> <key>subheadingName</key> <string>Item 3 of table 1</string> <key>subheadingDetail</key> <string>details about item 3!</string> </dict> </array> </dict> <key>Table 2</key> <dict> <key>subheadingArr</key> <array> <dict> <key>subheadingName</key> <string>Item 1 of table 2</string> <key>subheadingDetail</key> <string>details about item 1</string> </dict> <dict> <key>subheadingName</key> <string>Item 2 of table 2</string> <key>subheadingDetail</key> <string>details about item 2!</string> </dict> <dict> <key>subheadingName</key> <string>Item 3 of table 2</string> <key>subheadingDetail</key> <string>details about item 3!</string> </dict> </array> </dict> </dict> </plist> I am trying to write and read the I have made these 2 methods trying to read and write subheadingDetail for a specific subheadingName but they are wrong/incomplete and can't manage to get it work. -(void)updateInfo:(NSString *)info forSubHeadingName:(NSString *)subheadingName { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *path = [documentsDirectory stringByAppendingPathComponent:@"DeviceInformation.plist"]; NSMutableDictionary *data = [[NSMutableDictionary alloc] initWithContentsOfFile:path]; [data setObject:info forKey:subheadingName]; [data writeToFile:path atomically:YES]; } -(NSString *)readInfoForSubHeadingName:(NSString *)subheadingName { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *path = [documentsDirectory stringByAppendingPathComponent:@"DeviceInformation.plist"]; NSMutableDictionary *data = [[NSMutableDictionary alloc] initWithContentsOfFile:path]; return [data objectForKey:subheadingDetail]; } Tried searching around the answers, but couldn't find anything similar to my issue. Thanks in advance.

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  • Help with a loop to return UIImage from possible matches

    - by Canada Dev
    I am parsing a list of locations and would like to return a UIImage with a flag based on these locations. I have a string with the location. This can be many different locations and I would like to search this string for possible matches in an NSArray, and when there's a match, it should find the appropriate filename in an NSDictionary. Here's an example of the NSDictionary and NSArray: NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys: @"franceFlag", @"france", @"greeceFlag", @"greece", @"spainFlag", @"spain", @"norwayFlag", @"norway", nil]; NSArray *array = [NSArray arrayWithObjects: @"france" @"greece" @"spain" @"portugal" @"ireland" @"norway", nil]; Obviously I'll have a lot more countries and flags in both. Here's what I have got to so far: -(UIImage *)flagFromOrigin:(NSString *)locationString { NSRange range; for (NSString *arrayString in countryArray) { range = [locationString rangeOfString:arrayString]; if (range.location != NSNotFound) { return [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:[dictionary objectForKey: arrayString] ofType:@"png"]]; } } return nil; } Now, the above doesn't actually work. I am missing something (and perhaps not even doing it right in the first place) The issue is, the locationString could have several locations in the same country, described something like this "Barcelona, Spain", "Madrid, Spain", "North Spain", etc., but I just want to retrieve "Spain" in this case. (Also, notice caps for each country). Basically, I want to search the locationString I pass into the method for a possible match with one of the countries listed in the NSArray. If/When one is found, it should continue into the NSDictionary and grab the appropriate flag based on the correct matched string from the array. I believe the best way would then to take the string from the array, as this would be a stripped-out version of the location. Any help to point me in the right direction for the last bit is greatly appreciated.

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  • Extra retain counts after initWithNibName

    - by optimisticmonkey
    I have extra retain counts after calling initWithNib. What could cause this? (There are no referencing outlets in the nib) StepViewController *stepViewController = [[StepViewController alloc] initWithNibName:@"StepViewController" bundle:nil]; [self.navigationController pushViewController:stepViewController animated:YES]; [stepViewController release]; NSLog(@"nextStep stepViewController retain count %i", [stepViewController retainCount]); the above results in a retain count of 3... Thanks for any advice on how to troubleshoot

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  • How to truncate the string into required length in iphone sdk?

    - by monish
    Hi guys, I am having a string which contains more the 25 characters; NSString *str = @"This is the string to be truncated to 15 characters only"; In the above string I need only the 15 characters to be stored in another variable after truncation. can anyone suggest me how to do this? Anyone's help will be much appreciated. Thank you, Monish

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  • image is not getting loaded in view.

    - by anurag
    I have created 2 views named "FirstView" and "SecondView".SecondView's nib file has an UIImage view object as its IBOtlet.Now I am getting an UIImage object from some FirstViewController's method.Now I am setting the SecondViewController's imageView property with that image and then I am pushing my SecondView Controller's object in Navigation Controller.The SecondView gets loaded but that image is not shown in that view. The code is as follows:..... - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img editingInfo:(NSDictionary *)editInfo { [[picker parentViewController] dismissModalViewControllerAnimated:YES]; SecondViewController *secondView=[[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:[NSBundle mainBundle]]; secondView.imageView.image=img; [self.navigationController pushViewController:secondView animated:YES]; }

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  • Should I always release self for failed init methods?

    - by leo
    Should I always release self when there is a failure inside init, or should I only do so if I have initialized instance variables first? To put it another way, is this pattern valid? Is there a time when I shouldn't release self inside an init method, or should I assume that if the control flow enters init, self has at least a retain count of 1? - (id)init { if ((self = [super init]) == nil) { [self release]; return nil; } //do some init stuff if (somethingFailed) { [self release]; return nil; } return self; }

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  • Does Quartz2D test intersection of rect by line before drawing it.

    - by ddnv
    I'm drawing a big scheme that consist of a lot of lines. I do it in the drawRect: method of UIView. The scheme is larger than the layer of view and I check each line and draw it only if it intersects the visible rect. But at one moment I thought, should I do this? Maybe Quartz is already doing this test? So the question is: When I use function CGContextAddLineToPoint() does the Core Graphics tests this line for intersection with layer rect or it just draw it anyway?

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  • Generating an NSDictionary from an SQL statement.

    - by Ed Wist
    I am trying to generate an NSDictonary that can be used to populate a listview with data I retrieved from an SQL statement. when I go to create an array and add them it adds the arrays for ALL my keys and not just for the current key. I've tried a removeAllObjects on the array but for some reason that destroys ALL my data that I already put in the dictionary. //open the database if(sqlite3_open([dbPath UTF8String], &database) == SQLITE_OK) { const char *sql = "select alphaID, word from words order by word"; sqlite3_stmt *selectStatement; //prepare the select statement int returnValue = sqlite3_prepare_v2(database, sql, -1, &selectStatement, NULL); if(returnValue == SQLITE_OK) { NSMutableArray *NameArray = [[NSMutableArray alloc] init]; NSString *alphaTemp = [[NSString alloc] init]; //loop all the rows returned by the query. while(sqlite3_step(selectStatement) == SQLITE_ROW) { NSString *currentAlpha = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectStatement, 1)]; NSString *definitionName = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectStatement, 2)]; if (alphaTemp == nil){ alphaTemp = currentAlpha; } if ([alphaTemp isEqualToString:(NSString *)currentAlpha]) { [NameArray addObject:definitionName]; } else if (alphaTemp != (NSString *)currentAlpha) { [self.words setObject:NameArray forKey:currentAlpha]; [NameArray removeAllObjects]; [NameArray addObject:definitionName]; } } } The Statement above adds all the "keys" but then removes all the array elements for all keys. if I take out the removeAllKeys it adds ALL the array elements for ALL keys. I don't want this I want it to add the array elements FOR the specific key then move on to the next key. in the end I want a NSDictonary with A (array) Alpha (string) Apple (string) B (array) Beta (string) Ball (string) C (array) Code (string) ...

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  • How to check if a BOOL is null?

    - by Sheehan Alam
    Is there a way I can check to see if a value is NULL/Nil before assigning it to a BOOL? For example, I have a value in a NSDictionary that can be either TRUE/FALSE/NULL mySTUser.current_user_following = [[results objectForKey:@"current_user_following"]boolValue]; When the value is NULL I get the following error *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSNull boolValue]: unrecognized selector sent to instance I would like to be able to handle the NULL case.

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  • Is there a difference between NSString compare: and isEqual(ToString): ?

    - by frenetisch applaudierend
    Occasionally I find code which tests if two NSStrings are the same like this: if ([str1 compare:str2] == NSOrderedSame) { // Do something } Now, I believe this is less readable than using isEqualToString: and it also has some nasty side effects, like if str1 == nil the if(..) evaluates to true, or when str2 == nil havoc might break upon us according to the Apple docs. But before I crusade against those statements in my companys code, I wanted to make sure I didn't miss some important point. So my question basically boils down to: Is there any difference between a compare: to NSOrderedSame and isEqual:?

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  • opening iWorks documents in iPad UIWebView

    - by user369156
    Hello, I'm writing an iPad application that has a UIWebView which I open word and excel documents in, but I want the user to be able to import those documents into the iWorks applications, Pages and Numbers, just like how you can do it in Safari if you open a document. If you open a document in Safari on the iPad, there'll be a button on the top bar that says "Open in..." and you can choose applications to open in. You get the top bar to appear by tapping on middle of the page. So is there an option you can set to allow UIWebView to show up the bar and automatically detect the content type and populate the list with applications you can import in? Or do I have to build this myself? And if I have to build my own, how do I open URLs to import documents into Pages and Numbers etc? Thanks, -David

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