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  • Can't draw UImage in UIView::drawRect

    - by Joel
    I know this seems like a simple task, which is why I don't understand why I can't get the image to render. When I set up my UIView, I do the following: myUiView.backgroundColor = [UIColor clearColor]; myUiView.opaque = NO; I create and retain the UIImage in the init function of my UIView: image = [[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"test" ofType:@"png"]] retain]; then my drawRect looks like this: - (void) drawRect:(CGRect) rect { [image drawInRect:self.bounds]; } Ultimately I'll be manipulating that UIImage via bitmap context, and then in drawRect create a CGImage out of the context, and render that, but for now I'm just trying to get it rendering a known image. I've been digging through this site, as well as the documentation. I've gone down the CG path and tried drawing it with CGContextDrawImage by following the numerous examples other people have posted, but that didn't work either. So I've come back to what seems to be the most straightforward way to draw an image, but it isn't working. Any help would be greatly appreciated. Thanks in advance.

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  • Accessing ViewController's variables from UIActionSheet delegate

    - by VansFannel
    Hello. I have the following code: @implementation SendMapViewController NSMutableArray *emails; At this method I create emails array and I add some NSStrings: - (BOOL) peoplePickerNavigationController: (ABPeoplePickerNavigationController *)peoplePicker shouldContinueAfterSelectingPerson: (ABRecordRef)person { ABMultiValueRef emailInfo = ABRecordCopyValue(person, kABPersonEmailProperty); NSUInteger emailCount = ABMultiValueGetCount(emailInfo); if (emailCount > 1) { UIActionSheet *emailsAlert = [[UIActionSheet alloc] initWithTitle:@"Select an email" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil]; emails = [NSMutableArray arrayWithCapacity: emailCount]; for (NSUInteger i = 0; i < emailCount; i++) { NSString *emailFromContact = (NSString *)ABMultiValueCopyValueAtIndex(emailInfo, i); [emails addObject: emailFromContact]; [emailsAlert addButtonWithTitle:emailFromContact]; [emailFromContact release]; } [emailsAlert addButtonWithTitle:@"Cancel"]; [emailsAlert showInView:self.view]; [emailsAlert release]; } else { ... } CFRelease(emailInfo); [self dismissModalViewControllerAnimated:YES]; return NO; } As you can see in code, if there are more than one email I show and UIActionSheet. When user clicks on a button representing and email, I want to execute the following code: - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex { if ([emails count] >= buttonIndex) { NSString *contactEmail = (NSString *)[emails objectAtIndex:buttonIndex]; ... } } But emails array hasn't got any email. What I'm doing wrong? I'm developing for iPhone.

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  • Retain, reuse, release?

    - by Typeoneerror
    I've got a series of buttons that each use a different image. Can I reuse a retained variable like this below: // set images UIImage *image = [[dice1 backgroundImageForState:UIControlStateHighlighted] retain]; [dice1 setBackgroundImage:image forState:(UIControlStateHighlighted|UIControlStateSelected)]; image = [dice2 backgroundImageForState:UIControlStateHighlighted]; [dice2 setBackgroundImage:image forState:(UIControlStateHighlighted|UIControlStateSelected)]; image = [dice3 backgroundImageForState:UIControlStateHighlighted]; [dice3 setBackgroundImage:image forState:(UIControlStateHighlighted|UIControlStateSelected)]; image = [dice4 backgroundImageForState:UIControlStateHighlighted]; [dice4 setBackgroundImage:image forState:(UIControlStateHighlighted|UIControlStateSelected)]; image = [dice5 backgroundImageForState:UIControlStateHighlighted]; [dice5 setBackgroundImage:image forState:(UIControlStateHighlighted|UIControlStateSelected)]; image = [dice6 backgroundImageForState:UIControlStateHighlighted]; [dice6 setBackgroundImage:image forState:(UIControlStateHighlighted|UIControlStateSelected)]; [image release]; or do I need to create a new UIImage for each image passed to each button's setBackgroundImage: like so: // set images UIImage *image1 = [dice1 backgroundImageForState:UIControlStateHighlighted]; [dice1 setBackgroundImage:image1 forState:(UIControlStateHighlighted|UIControlStateSelected)]; UIImage *image2 = [dice2 backgroundImageForState:UIControlStateHighlighted]; [dice2 setBackgroundImage:image forState:(UIControlStateHighlighted|UIControlStateSelected)]; and rely on autorelease rather than a retained UIImage. I'm not sure if assigning the image to a different UIImage would effect the retain count.

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  • Editing a UIViewController from another class.

    - by Guy
    I am trying to programmatically change the user interface of a UIViewController from another NSObject class. The problem is that I am unsure of how to access the UIViewController's view from the NSObject class. So for example, in my NSObject class, I say something like: self.view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)]; self.view.backgroundColor = [UIColor yellowColor]; but I keep getting errors saying "Request for member "view" in something not a strut or union." Is there something I need to allow my NSObject class to see my UIViewController? Thanks!

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  • Recursively find files/directories within a directory

    - by enchilada
    I want to use enumeratorAtURL:includingPropertiesForKeys:options:errorHandler: to do this, as I'm coding under Snow Leopard. I know how to use this method. However, as for my purposes it's not adequate to load the contents lazily, I have the following question: How can I create an object hierarchy (of, say, the custom FileOrDirectory class with the standard children,count,isLeaf attributes) from the information I load from the enumeratorAtURL: method? I need to load this data beforehand, and show it in an outline view, for my purposes.

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  • Insert a tag with NSFileHandle

    - by zp26
    Hi, I want insert a tag in the Xml file. I have NSFileHandle object and i know the "offsetInFile" and the "seekToFileOffset:" methods but i don't know how to use. I have the Xml below and i want insert a tag between "positions" and "/positions" tag. Thanks so much. <?xml version=1.0 encoding=UTF-8 ?> <positions> //I want insert in this position my tag with the NSFileHandle. </positions>

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  • Hide buttons when making a screenshot UIGraphicsBeginImageContextWithOptions

    - by Jan
    is there a way to hide specific buttons (IBAction) when making a screenshot with UIGraphicsBeginImageContextWithOptions ? I'm using the code below: // Define the dimensions of the screenshot you want to take (the entire screen in this case) UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, self.view.opaque, 0.0); [self.view.layer renderInContext:UIGraphicsGetCurrentContext()]; UIImage *sourceImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); //now we will position the image, X/Y away from top left corner to get the portion we want UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, self.view.opaque, 0.0); [sourceImage drawAtPoint:CGPointMake(0, -20)]; UIImage *croppedImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); UIImageWriteToSavedPhotosAlbum(croppedImage,nil, nil, nil); Thank you for your answer!

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  • using KVO to filter an NSTableView using NSPredicate (with arrays)

    - by KingRufus
    My UI is not updating when I expect it to. The application displays "projects" using a view similar to iTunes -- a source list on the left lets you filter a list (NSTableView) on the right. My filters update properly when they are examining any simple field (like name, a string), but not for arrays (like tags). I'm removing a tag from one of my objects (from an NSMutableArray field called "tags") and I expect it to disappear from the list because it no longer matches the predicate that is bound to my table's NSArrayController. ProjectBrowser.mm: self.filter = NSPredicate* srcPredicate = [NSPredicate predicateWithFormat:@"%@ IN %K", selectedTag, @"tags"]; Project.mm: [self willChangeValueForKey:@"tags"]; [tags removeAllObjects]; [self didChangeValueForKey:@"tags"]; I've also tried this, but the result is the same: [[self mutableArrayValueForKey:@"tags"] removeAllObjects]; Interface Builder setup: a ProjectBrowser object is the XIB's File Owner an NSArrayController (Project Controller) has its Content Array bound to "File's Owner".projects Project Controller's filter predicate is bound to "File's Owner".filter NSTableView's column is bound to "Project Controller".name

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  • using QTkit for recording audio

    - by RW
    It looks like using core audio to record audio is overly complicated. While QTkit is basic and down to earth However. All of the examples I have see integrate video and audio together. Does some one have or know an example of using QTkit for recording audio? rw

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  • Problem while fetching xml through some rss feed

    - by Tariq- iPHONE Programmer
    I was fetching xml through some rss feed. I am unable to sort items in depth like i have sorted easily "channel - description" as NSString *resultValue=[[responseDictionary valueForKeyPath:@"rss.channel.description"] textContent]; Above Result: YouTube RSS Feed My question is how i can parse .... item - description... i.e (Music video by Andrews \U00a9 1982 MJJ Productions Inc.) i am getting nil if i fetch like valueForKeyPath:@"rss.channel.item.description"] Key: rss Value: { "_text" = "\n"; channel = { "_text" = "\n"; description = { "_text" = "YouTube RSS Feed"; }; item = ( { "_text" = "\n\t"; description = { "_text" = "Music video by Andrews \U00a9 1982 MJJ Productions Inc."; }; enclosure = { length = 294; type = "application/x-shockwave-flash"; url = "http://youtube.com/v/Zi_XLOBDo_Y.swf"; }; link = { "_text" = "http://youtube.com/?v=Zi_XLOBDo_Y"; };

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  • forward invocation, by hand vs magically?

    - by John Smith
    I have the following two class: //file FruitTree.h @interface FruitTree : NSObject { Fruit * f; Leaf * l; } @end //file FruitTree.m @implementation FruitTree //here I get the number of seeds from the object f @end //file Fruit @interface Fruit : NSObject { int seeds; } -(int) countfruitseeds; @end My question is at the point of how I request the number of seeds from f. I have two choices. Either: Since I know f I can explicitly call it, i.e. I implement the method -(int) countfruitseeds { return [f countfruitseeds]; } Or: I can just use forwardInvocation: - (NSMethodSignature *)methodSignatureForSelector:(SEL)selector { // does the delegate respond to this selector? if ([f respondsToSelector:selector]) return [f methodSignatureForSelector:selector]; else if ([l respondsToSelector:selector]) return [l methodSignatureForSelector:selector]; else return [super methodSignatureForSelector: selector]; } - (void)forwardInvocation:(NSInvocation *)invocation { [invocation invokeWithTarget:f]; } (Note this is only a toy example to ask my question. My real classes have lots of methods, which is why I am asking.) Which is the better/faster method?

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  • Filter entire NSDictionaries out of NSArray based on multiple keys

    - by user270475
    Hi, I have an NSArray of NSDictionary objects which I would like to be able to return a new array of NSDictionaries from, where every NSDictionary has "Area == North" (for example). The closest example I have found so far is http://stackoverflow.com/questions/958622/using-nspredicate-to-filter-an-nsarray-based-on-nsdictionary-keys but this just returns the unique values for a given key, not the dictionary that has that key. Is there any way to perform a similar operation, and to return the entire dictionary?

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  • iPhone PopUp RGB colors

    - by McLas
    Hi, I am presenting a UIView with an animation that takes half of the screen. I've seen it in many apps but could not find the appropriate RGB colors: iOS uses it for example in "contacts": http://img98.imageshack.us/img98/9402/image001u.png I'm trying with : bottomLayer.backgroundColor = [[UIColor colorWithRed:80.0/255.0 green:86.0/255.0 blue:97.0/255.0 alpha:1] CGColor]; but it's all whitey. If anyone could get how this popup is designed... Thanks!

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  • How to handle duplicate symbol error from 3rd party libraries?

    - by brettr
    I have two 3rd party libraries that seem to use the same class. That should be fine but I'm getting this type of error when building: ld: duplicate symbol .objc_class_name_CJSONScanner in /Users/myappOne/TapjoyConnect/Frameworks/libTapjoyConnectSimulatorRewardInstall_Ads_Pinch.a(CJSONScanner.o) and /Developer/Projects/BuildOutput/Debug-iphonesimulator/OtherLibrary_d.a(CJSONScanner.o) How can I handle this issue?

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  • How to make NSView not clip its bounding area?

    - by Jeremy L
    I created an empty Cocoa app on Xcode for OS X, and added: - (void)applicationDidFinishLaunching:(NSNotification *)aNotification { self.view = [[NSView alloc] initWithFrame:NSMakeRect(100, 100, 200, 200)]; self.view.wantsLayer = YES; self.view.layer = [CALayer layer]; self.view.layer.backgroundColor = [[NSColor yellowColor] CGColor]; self.view.layer.anchorPoint = CGPointMake(0.5, 0.5); self.view.layer.transform = CATransform3DMakeRotation(30 * M_PI / 180, 1, 1, 1); [self.window.contentView addSubview:self.view]; } But the rotated layer's background is clipped by the view's bounding area: I thought since some version of OS X and iOS, the view won't clip the content of its subviews and will show everything inside and outside? On iOS, I do see that behavior, but I wonder why it shows up like that and how to make everything show? (I am already using the most current Xcode 4.4.1 on Mountain Lion). (note: if you try the code above, you will need to link to Quartz Core, and possibly import the quartz core header, although I wonder why I didn't import the header and it still compiles perfectly)

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  • Adding ivars to NSManagedObject subclass

    - by The Crazy Chimp
    When I create an entity using core data then generate a subclass of NSManagedObject from it I get the following output (in the .h): @class Foo; @interface Foo : NSManagedObject @property (nonatomic, retain) NSString *name; @property (nonatomic, retain) NSSet *otherValues; @end However, in my .m file I want to make use of the name and otherValues values. Normally I would simply create a couple of ivars and then add the properties for them as I required. That way I can access them in my .m file easily. In this situation would it be acceptable to do this? Would adding ivars to the .h (for name and otherValues) cause any unusual behaviour in the persistance & retrieval of objects?

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  • Progressive download of images in a UITableView

    - by ncohen
    Hi everyone, I'm developing on the iPhone and I have seen in the AppStore that the images are progressively downloaded in the UITableView... How can I implement that? My idea was to detect the showed content (which cells are shown) and download these images. My problem is that I don't know how to detect the showed cells! Is it the good way to do it? Best

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  • Unit Testing Model Classes that derive from NSManagedObject

    - by Matt Baker
    So...I'm trying to get unit tests set up in my iPhone App but I'm having some issues. I'm trying to test my model classes but they inherit directly from NSManagedObject. I'm sure this is a problem but I don't know how to get around it. Everything is building and running as expected but I get this error when calling any method on the class I'm testing: Unknown.m:0:0 unrecognized selector sent to instance 0xc2b120 If I follow this structure (http://chanson.livejournal.com/115621.html) to create my object in my tests I end up with another error entirely but it still doesn't help me. Basically my question is this: how can I test a class that inherits from NSManagedObject?

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  • Mac OS X Status Bar Application - Hiding it from Cmd/Alt menu?

    - by Moddy
    I'm trying to whip up a simple little Status Bar Application in Obj-C/Cocoa. So I have done it pragmatically - declaring an NSStatusItem, adding it to the NSStatusBar and then giving it a NSMenu object. A bit like this... NSStatusBar *bar = [NSStatusBar systemStatusBar]; theItem = [bar statusItemWithLength:NSVariableStatusItemLength]; [theItem retain]; [theItem setTitle: NSLocalizedString(@"Tablet",@"")]; [theItem setHighlightMode:YES]; [theItem setMenu:theMenu]; (Example taken from "Status Bar Programming Topics", Apple Documentation) Now ideally, I'd like this application to run and not be accessible from the CMD/ALT window changing "menu" (for lack of a better word), I've seen applications do it before and would like that really. The idea is I just want it to be accessible from every window, whilst not having its own NSMenu on the status bar, and whilst not being able to have it as the active application ( - so its not able to take over the whole Status Bar, and its not able to be seen through CMD/ALT) Additionally, I was wondering if the StatusBarItem supports the ability to drag-n-drop an item onto it? I'm not sure if thats a limitation of the NSStatusBar though. I've read up on deamons and agents, but that seems far too low level/over kill for such a simplistic app! Cheers in advance!

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