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  • How do I remove those rotation artefacts from my CATiledLayer?

    - by Felix
    Hello all, I have a CATiledLayer into which I render content in the following method - (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx I used the QuartzDemo code to draw a pattern. This works very well until I apply a rotation transform to the layer's parentLayer (a UIView): rotated: These zigzag artefacts become worse when I start drawing lines and texts into the CATiledLayer. I applied the transform as follows (I also tried using an affine transform on the view itself): self.containerView.layer.transform = CATransform3DMakeRotation(angleRadians, 0.0f, 0.0f, 1.0f); I transform the containerView rather than the layer itself, as I have several layers in that view that I would like to rotate at the same time without changing the relative positions. I did not have problems when rotating UIImageViews in the past. Is there a way that I can rotate the CATiledLayer without these problems? Any help would be greatly appreciated. Yours, Felix

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  • Core Data (NSFetchedResultsController) displaying one row per section

    - by Urizen
    I have a CoreData application which uses NSFetchedResultsController. NSFetchedResultsController is useful in that it allows me to access the fetched objects more easily etc. but I find that I have problems with the following: I get a crash when I display a single row for each section (irrespective of the number of actual rows present) as a summary of the information in that section (e.g. showing a statistical analysis of the data contained in the fetched rows for that section). I understand that the NSFetchedResultsControllerDelegatemethods have to agree with the number of rows reported per section by the UITableView Delegate method but I would like to be able to fetch all of the records for each section without necessarily displaying each of the rows. The above causes me inconsistency crashes, when I try to insert or delete data for a section, which reports that the number of rows for each section is not as it should be given the number of insertions/deletions. Is there any way I can do what I'm trying to achieve? Thanks for any help.

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  • Two PickerViews in save View issue?

    - by NextRev
    I'm trying to have 2 pickerviews in the same view. It works except for two things. If one pickerview has more rows than the other the app crashes when picking an item from the pickerview with more items. Also I created an NSLog for the pickerviews and the console shows that I'm picking two items at once when in fact i'm only dealing with one pickerview. I know it sounds a bit confusing but I'm including all the code. Thank you in advance. list and list2 are NSMutableArrays list has 4 items list2 has 5 items There error: * Terminating app due to uncaught exception 'NSRangeException', reason: '* -[NSCFArray objectAtIndex:]: index (4) beyond bounds (4)' -(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)thePickerView{ if([thePickerView isEqual:pickerView1 ]){ return 1; } else if([thePickerView isEqual:pickerView2]){ return 1; } else{ return 0; } } -(NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component{ if([thePickerView isEqual:pickerView1 ]){ return [list count]; } else if([thePickerView isEqual:pickerView2]){ return [list2 count]; } else{ return 0; } } -(NSString *)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{ if([thePickerView isEqual:pickerView1 ]){ return [list objectAtIndex:row]; } else if([thePickerView isEqual:pickerView2]){ return [list2 objectAtIndex:row]; } else{ return 0; } } - (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { NSLog(@"Selected item %@. Index of selected item:%i", [list objectAtIndex:row], row); NSLog(@"Selected item %@. Index of selected item:%i", [list2 objectAtIndex:row], row); NSLog(@"Selected item %@. Index of selected item:%i", [list3 objectAtIndex:row], row); if([thePickerView isEqual:pickerView1 ]){ //Do Something } else if([thePickerView isEqual:pickerView2 ]){ //Do Something } else if([thePickerView isEqual:pickerView3 ]){ //Do Something } }

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  • Core Data and NSDate

    - by Pierre
    Hi ! I read this post but I don't really understand the code... I have a core data database with an Entity and some attributes. One of them is named "myDate" and has for type NSDate. Now I want to to display each date but eliminate dates with same day-month-year and display them ascendantly . Have you got an idea? Thanks a lot !

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  • how to put api key when sharing with twitter

    - by kassar
    I wrote a code in objective c for sharing on twitter, I pass in to the api the username & password and it runs successfully. I have registered a twitter api key for my application but I don't know how I can pass it in the twitter api. Could you plz help me? Sorry for my english.

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  • getting error when using mapkit in xcode?

    - by Rahul Vyas
    'NSInvalidUnarchiveOperationException', reason: '*** -[NSKeyedUnarchiver decodeObjectForKey:]: cannot decode object of class (MKMapView)' i am getting this error.am i missed something.i don't know from where to add MApkit.framework first i tried with target-getInfo and then from the bottom + sign added framework but that did not wrked.then i search in spotlight and added another framework.by adding this it removed previous error but gives the above one.what is the exact location of mapkit framework. i want to test it in simulator.

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  • Trying to compile MobileSubstrate addon - Undefined symbol

    - by eWolf
    Hi! I went through this tutorial to create a MobileSubstrate addon. I could compile the example hook without errors. But as soon as I add #import <SpringBoard/SBAwayController.h> in ExampleHookProtocol.h and SBAwayController *awayController = [SBAwayController sharedAwayController]; in ExampleHookLibrary.mm (as the first line of the __$ExampleHook_AppIcon_Launch function) I get the following error message when attempting to make (triggered by the latter change): Undefined symbols: "_OBJC_CLASS_$_SBAwayController", referenced from: __objc_classrefs__DATA@0 in ExampleHookLibrary.o ld: symbol(s) not found collect2: ld returned 1 exit status make: *** [ExampleHook.dylib] Error 1. The header file for SBAwayController is located in /var/toolchain/sys30/usr/include/SpringBoard, just like SBApplicationIcon.h, which is used by the ExampleHook. I'm compiling on my iPod touch 2G. Can anyone help me? Thanks in advance, Eric

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  • Need advise about compare NSDate

    - by RAGOpoR
    im developing Alarm Clock i want to compare a time now and setTime is it possible to compare in minute only. My Problem is NSDate will compare in second example 9:38:50 are not equal 9:38:00 how can i compare in minute ? is it possible thanks you for all advise.

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  • Equivalent of CGPoint with integers?

    - by Ivan Vucica
    Cheers, I like strict typing in C. Therefore, I don't want to store a 2D vector of floats if I specifically need integers. Is there an Apple-provided equivalent of CGPoint which stores data as integers? I've implemented my type Vector2i and its companion function Vector2iMake() à la CGPoint, but something deep in me screams that Apple was there already.

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  • Equivalent of CGPoint with integers?

    - by Ivan Vucica
    Cheers, I like strict typing in C. Therefore, I don't want to store a 2D vector of floats if I specifically need integers. Is there an Apple-provided equivalent of CGPoint which stores data as integers? I've implemented my type Vector2i and its companion function Vector2iMake() à la CGPoint, but something deep in me screams that Apple was there already.

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  • How to implement checkout/basket system

    - by ct2k7
    Hi, I'm making an app for fun and would like to know how to implement a checkout/basket system on the app. Basically, a list of products is pulled in from a web server in form of XML file, which is then displayed in a UITableView controller. A tap on the cell takes the user to a more detailed overview of the product. The app would need to be able to get the product into a basket type thing, and this is where I'm getting stuck. Are there any code samples that I could take a look at?

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  • UITextField with the lookup

    - by leon
    Hello, I would like to achive the same functinoanlity in the UUTextField control as Google search web site (which uses Ajax for this): as user start typing, list of suggestion searches is shown. Then more letteres you type, suggestion list changes. So imaging I have array of words: Apple Abc Aman As user types A, all thress suggesions are shown, if user type one more letter p, then Apple is suggested. How would I do something like this? Mail type of applicatins do it, when receipent name is typed in the To: edit control I guess I can use UITableView with the search, is it correct approach?

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  • How can I create a transparent tableview with each cells being transparent instead of showing white

    - by wolverine
    I tried all this inside - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 1.tableView.backgroundColor = [UIColor clearColor]; 2.cell.backgroundColor = [UIColor clearColor]; 3.cell.contentView.backgroundColor = [UIColor clearColor]; It only responds to the 1st line and makes the background a translucent kind of black. What should I do to get 100% transparency?

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  • Why doesen't it work to write this NSMutableArray to a plist?

    - by Emil
    edited. Hey, I am trying to write an NSMutableArray to a plist. The compiler does not show any errors, but it does not write to the plist anyway. I have tried this on a real device too, not just the Simulator. Basically, what this code does, is that when you click the accessoryView of a UITableViewCell, it gets the indexPath pressed, edits an NSMutableArray and tries to write that NSMutableArray to a plist. It then reloads the arrays mentioned (from multiple plists) and reloads the data in a UITableView from the arrays. Code: NSIndexPath *indexPath = [table indexPathForRowAtPoint:[[[event touchesForView:sender] anyObject] locationInView:table]]; [arrayFav removeObjectAtIndex:[arrayFav indexOfObject:[NSNumber numberWithInt:[[arraySub objectAtIndex:indexPath.row] intValue]]]]; NSString *rootPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; NSString *plistPath = [rootPath stringByAppendingPathComponent:@"arrayFav.plist"]; NSLog(@"%@ - %@", rootPath, plistPath); [arrayFav writeToFile:plistPath atomically:YES]; // Reloads data into the arrays [self loadDataFromPlists]; // Reloads data in tableView from arrays [tableFarts reloadData];

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  • Annotation Title/Subtitle under Pins

    - by ludo
    Hi, I use the Map to display some pin location from my database, everything is working fine. After that I use a pickerView to let the user display some specific pins. So I remove all the Pins first with [mapView removeAnnotations:mapView.anotations]; and display new Pins. There is like 100 of news pins, my problem is when I click on a Pin, the Title and subtitle are display under the others pins. Someone got the same problem? Thanks, P.S: Don't know if its relevant but I add a custom image for the pins.

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  • Localization of strings in static lib

    - by AO
    I have a project that uses a static library (SL). In that SL, there are a couple of strings I'd like to localize and the project includes all of the localization files. The localization works just fine when storing all text translations in the same file. The thing is that I'd like to separate the SL strings from the other strings. I have tried to put two different *.strings files (Localizable.strings and Localizable2.strings) in the language folder of interest but that did not work. I have also tried to use two *.strings file with the same name (Localizable.strings) but with different paths. It didn't work either. It seems that only one localization file is supported, right? Could anyone suggest a good way of doing this? I'm using SDK 3.2 beta 2.

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  • What's wrong with how I'm using NSDateFormatter?

    - by Thom Mahoney
    dateFormatter = [[NSDateFormatter alloc] init]; dateFormatter.locale = [[[NSLocale alloc] initWithLocaleIdentifier:@"en_US"] autorelease]; [dateFormatter setDateFormat:@"EEE, d MMM yyyy HH:mm:ss zzz"]; NSString dateString = @"Tue, 08 Jun 2010 17:00:00 EDT"; NSDate eventDate = [dateFormatter dateFromString:dateString]; In this case the eventDate object is nil. Can somebody clue me in? This code used to work.

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  • [CFArray release]: message sent to deallocated instance

    - by arielcamus
    Hi, I'm using the following method in my code: - (NSMutableArray *) newOrderedArray:(NSMutableArray *)array ByKey:(NSString *)key ascending:(BOOL)ascending { NSSortDescriptor *idDescriptor = [[NSSortDescriptor alloc] initWithKey:key ascending:ascending]; NSArray *sortDescriptors = [NSArray arrayWithObject:idDescriptor]; NSArray *orderArray = [array sortedArrayUsingDescriptors:sortDescriptors]; [idDescriptor release]; NSMutableArray *result = [NSMutableArray arrayWithArray:orderArray]; return result; } Is this a well-coded convenience method? As I think, it returns an autoreleased NSMutableArray. This method is called by another one: - (id) otherMethod { NSMutableArray *otherResult = [[[NSMutableArray alloc] initWithCapacity:[otherArray count]] autorelease]; // I add some stuff to otherResult and then... NSMutableArray *result = [dbUtils newOrderedArray:otherResult ByKey:@"objectId" ascending:NO]; return result; } This method (otherMethod) is called in some view controller where I want to store returned array and release it when deallocating the view controller. However, when [result retain] is called in this view controller (because I need it to be available and I can't allow it to be deallocated) I receive the following error: [CFArray release]: message sent to deallocated instance I've tried to log [result retainCount] just before calling retain and it print "1". I don't understand why an error is thrown when calling retain. Thank you, A

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  • Preserve onchange for a dropdown list when setting the value with Javascript.

    - by Zac Altman
    I have a dropdown list with a piece of code that is run when the value is changed: <select name="SList" onchange="javascript:setTimeout('__doPostBack(\'SList\',\'\')', 0)" id="SList"> Everything works fine when manually done. As an option is selected, the onchange code is called. The problem begins when I try to change the selected value using a piece of Javscript. I want to be able to automatically change the selected option using JS, whilst still having the onchange code called, exactly as if done manually. I try calling this: form.SList.value = "33"; The right option is selected, but the onchange code does not get called. So then I try doing this: form.SList.value = "33"; javascript:setTimeout('__doPostBack(\'SList\',\'\')', 0); The right value is not selected and nothing happens. FYI, the code is done in ASP.NET and Javascript. What can I run to change the selected option whilst still calling the onchange code?

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  • UIWebView finishes too fast

    - by Dan Ray
    I'm loading a biggish (and javascript-heavy) page into a UIWebView, and I want to add a UIActivityView to spin while it thinks. Problem is, my - (void)webViewDidFinishLoad:(UIWebView *)webView method gets called quite a while before the rendering actually happens. Enough so that my spinner (which set to hide when stopped) never actually shows up. By the time the UI is even assembled, the spinner has already been stopped and hidden, even though there's enough time to wonder if it's broken before the UIWebView actually gets the goods to the screen. I wish there was a "webViewDidFinishRendering", but that would imply that WebKit is something other than lickedy-split fast... ;-) Thoughts? Perhaps I should toss the thing up and set a timer to come stop it, and unhook that from anything that's actually happening in the WebView?

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