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  • How to compare/merge between XIB files?

    - by sasayins
    Hi guyz, I have these two XIB files. The first one edited by my friend to add features and to other one edited by my self and add another features. My problem is how can i merge the two files? I know that XIB files are XML based and I can use some compare tools to merge it. But I think there will be some conflicts. What is the best way to compare or merge between XIB files? Thanks a lot guys. sasayins

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  • containsObject - why doesen't this work?

    - by Emil
    Hi. I have an array that I am trying to check wether or not an indexPath(.row) exists in. I use this code: if ([array containsObject:[NSNumber numberWithInt:indexPath.row]]){ NSLog(@"Yep, it exists in there."); } the array consist of the numbers 3, 8 and 2. The index path loads numbers fromm 0 to 8 in a loop. Can anybody see why this doesen't work?

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  • for question about autorotation

    - by user177893
    my superview is UItabelview and my subviews are UITabelview and UIDatePicker. for my subviews didn't able to call (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration why? bcoz this method calls when view rotates and at that time i want to set autoresizingmask method for that view so that when my subview rotates from Portrait to landscape mode it's view resizes automatically?

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  • parse JSON . I have server response

    - by GauravBOSS
    i am new in JSON Parsing . i have a server response how i can fetch the "Device Name and Id" of 0 index. thanks in Advance { Successfully = ( { 0 = { DeviceName = Tommy; DeviceTypeId = 1; EMEI = xxxxxx; GId = xxxxx; Id = 105; Pet = "<null>"; PetImage = "352022008228784.jpg"; ProtocolId = xxxx; SimNo = xxxxx; }; } ); }

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  • Implementing scroll view that is much larger than the screen view with random images

    - by pulegium
    What I'm trying to do is to implement something like the fruit machine scroll view. Basically I have a sequence of images (randomly generated on the fly) and I want to allow the users to scroll through this line. There can fit approx 10 images on the screen, but the line is virtually unlimited. My question is what would be the best approach in implementing this? So far I've thought of having a UIImageView going across the screen (with width equal to the sum of 10 images) and the image associated with it would be a combination of 12 or so images, with two images falling out of the visible area, this would allow for smooth scrolling. If the user scrolls further, then I would reconstruct the image associated with the view so the new images are appended and the old one's are discarded. This image reconstruction business sounds bit complicated, so I was wondering if there's a more logical way to implement this. There's one more thing, I want to have two lines crossing each other with images, bit like conveyor belts crossing. If that makes any sense... Bit like below: V1 V2 H1 H2 H3 H4 H5 V4 V5 So if the vertical belt is moved it'd be like: V2 H3 H1 H2 V4 H4 H5 V5 V6 H1-H5, V1-V6 being automatically generated images. I'm not asking for the implementation code, just the thoughts on the principles how to implement this. Thanks!! :)

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  • NSDate & Memory management

    - by iFloh
    Hi, memory management still gives me grief. This time it is an NSDate iVar that I init using NSDate *myNSDate = [[NSDate date] firstDayOfMonth]; with a method call to - (NSDate *)firstDayOfMonth { NSDateComponents *tmpDateComponents = [[NSCalendar currentCalendar] components:NSYearCalendarUnit | NSMonthCalendarUnit | NSEraCalendarUnit | NSWeekCalendarUnit | NSWeekdayOrdinalCalendarUnit fromDate:self]; [tmpDateComponents setDay:1]; [tmpDateComponents setHour:0]; [tmpDateComponents setMinute:0]; [tmpDateComponents setSecond:0]; return [[NSCalendar currentCalendar] dateFromComponents:tmpDateComponents]; } At the end of the init call the retain count is at 1 (Note the iVar is not defined as a property). When I step into the viewWillAppear method the myNSDate has vanished. I tried to do an explicit retain on it, but that only lasts until I update the iVar using the above method again. I though - ok - I add the retain to the return of the function, but that makes the leak analyser throw up an error. What am I doing wrong?

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  • read past bandswitch

    - by user262325
    Hello everyone I know there is no public api to read 3g/wifi bandswitch. But I wonder how this app can do this? http://itunes.apple.com/ca/app/download-meter-for-wi-fi-gprs/id327227530?mt=8 Thanks interdev

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  • How do I return the entire set / array using NSPredicate?

    - by Prairiedogg
    I'm building a carArray and want to filter the contents conditionally, using an NSPredicate, like so: NSPredicate *pred; switch (carType) { case FreeCar: pred = [NSPredicate predicateWithFormat:@"premium = NO"]; break; case PremiumCar: pred = [NSPredicate predicateWithFormat:@"premium = YES"]; break; default: pred = [NSPredicate predicateWithFormat:@"SOME PREDICATE THAT RETURNS EVERYTHING"]; break; } self.carArray = [aCarArrayIGotFromSomewhere filteredArrayUsingPredicate:pred]; My question is, what is the correct syntax for the value I've stubbed in as SOME PREDICATE THAT RETURNS EVERYTHING which returns all of the instances in the array / set? PS - I know the answer and will post it immediately, just sharing it for everyone's reference as an earlier search on SO did not yield the result.

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  • What class should manage/control the CALayers in my view using proper MVC?

    - by wanderlust
    I have a ViewController with a view (UIView). I need to handle touches, run some logic, check against model data, and and add and remove sublayers to the view based on those touches. Then I need to update the model based on the results. Should I have: ViewController - manage touches, get/set model data, add/remove sublayers UIView CALayer Sublayers or Controller (NSObject) - get/set data ViewController - manage touches, add/remove sublayers UIView CALayer Sublayers or Controller (NSObject) - get/set data CustomView - manage touches, add/remove sublayers CALayer Sublayers Or is it something else all together? No matter what I try, it "feels" awkward. SVN is my friend. Can you guys help a girl (with architectural issues) out?

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  • NSData dataWithContentsOfURL

    - by ketan rajput
    I have this method for button click (download). The problem is that it is terminating due to an exception: [Session started at 2011-03-14 13:06:45 +0530.] 2011-03-14 13:06:45.710 XML[7079:20b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSCFString isFileURL]: unrecognized selector sent to instance 0x62b8' -(IBAction) download { UIImage *image = [UIImage imageWithData: [NSData dataWithContentsOfURL:@"http://ws.cdyne.com/WeatherWS/Images/thunderstorms.gif"]]; [image release]; } What is the problem?

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  • How to upload contents of a file to a UITextView?

    - by Mike Rychev
    Hello! I have about twenty UITextViews and corresponding .txt files. What I want is to make each UITextView take the contents of the corresponding file and display it. Moreover, the text is formatted and it contains some formulas (copy/pasted from Grapher). I've heard about displaying formatted text in UIWebView, but I haven't found a clear explanation anywhere. Thanks in advance!

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  • UIScrollView - Figuring out where the scroll will stop

    - by spin-docta
    I'm trying to figure out how to calculate where the scrollview will stop when a user does a swipe gesture and the scrollview goes into deceleration. I'm trying to use the delegate functions, but I can't accurately figure it out. Please help! - (void) scrollViewDidScroll:(UIScrollView *)scrollView; - (void) scrollViewWillBeginDecelerating:(UIScrollView *)scrollView; - (void) scrollViewDidEndDecelerating:(UIScrollView *)scrollView;

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  • When I mark a property as transient, does the type matter?

    - by mystify
    For example, I make a fullName property and set it to transient. Does it matter what data type that property is, in this case? For example, does it matter if it's set to int or string? As far as I get it, a transient property is almost "ignored" by Core Data. I make my accessors for that and when someone accesses fullName, I simply construct a string and return that. Did I miss something?

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  • How to detect changes on UIPickerView ?

    - by tristaf
    I want to detect changes of UIPickerView value. If UIPickerView respond to addTarget i used a code like this: -(void) valueChange:(id)sender { change = YES; } UIPickerView *questionPicker = [[UIPickerView alloc] init]; [questionPicker addTarget:self action:@selector(valueChange:) forControlEvents:UIControlEventValueChanged]; How can i do same things but in a correct way ? Thanks

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  • NSFetchedResultsController sections localized sorted

    - by Gerd
    How could I use the NSFetchedResultsController with translated sort key and sectionKeyPath? Problem: I have ID in the property "type" in the database like typeA, typeB, typeC,... and not the value directly because it should be localized. In English typeA=Bird, typeB=Cat, typeC=Dog in German it would be Vogel, Katze, Hund. With a NSFetchedResultController with sort key and sectionKeyPath on "type" I receive the order and sections - typeA - typeB - typeC Next I translate for display and everything is fine in English: - Bird - Cat - Dog Now I switch to German and receive a wrong sort order - Vogel - Katze - Hund because it still sorts by typeA, typeB, typeC So I'm looking for a way to localize the sort for the NSFetchedResultsController. I tried the transient property approach, but this doesn't work for the sort key because the sort key need to be in the entity. I have no other idea. But I can't believe that's not possible to use NSFetchedResultsController on a derived attribute required for localization? There are related discussions like http://stackoverflow.com/questions/1384345/using-custom-sections-with-nsfetchedresultscontroller but the difference is that the custom section names and the sort key have probably the same order. Not in my case and this is the main difference. At the end I would need a sort order for the necessary NSSortDescriptor on a derived attribute, I guess. This sort order has also to serve for the sectionKeyPath. Thanks for any hint.

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  • NSMutableArray: count is a method or a property?

    - by Rafael Oliveira
    I want to verify if I'm in the last cell of the UITable. Should I use a NSInteger property in my controller and store the value of the count of the data (it's an NSMutableArray) that populates the table? I'm asking because I don't know if count iterates over all objects of the array to count or if it only gets me a value of a count property. What would be better ? store the value: myCount = [myArray count] use directly: [myArray count] store numberOfRows: myCount = numberOfRowsInSection:[indexPath 0] use numberOfRows directly: numberOfRowsInSection:[indexPath 0]

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  • UIViewController memory management

    - by jAmi
    Hi I have a very basic issue of memory management with my UIViewController (or any other object that I create); The problem is that in Instruments my Object allocation graph is always rising even though I am calling release on then assigning them nil. I have 2 UIViewController sub-classes each initializing with a NIB; I add the first ViewController to the main window like [window addSubView:first.view]; Then in my first ViewController nib file I have a Button which loads the second ViewController like : -(IBAction)loadSecondView{ if(second!=nil){ //second is set as an iVar and @property (nonatomic, retain)ViewController2* sceond; [second release]; second=nil; } second=[[ViewController2* second]initWithNibName:@"ViewController2" bundle:nil]; [self.view addSubView:second.view]; } In my (second) ViewController2 i have a button with an action method -(IBAction) removeSecond{ [self.view removeFromSuperView]; } Please let me know if the above scheme works in a managed way for memory...? In Instruments It does not show release of any allocation and keeps the bar status graph keeps on rising.

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  • Create a new delegate class for each asynchronous image download?

    - by Charles S.
    First, I'm using an NSURLConnection to download JSON data from twitter. Then, I'm using a second NSURLConnection to download corresponding user avatar images (the urls to the images are parsed from the first data download). For the first data connection, I have my TwitterViewController set as the NSURLConnection delegate. I've created a separate class (ImageDownloadDelegate) to function as the delegate for a second NSURLConnection that handles the images. After the tweets are finished downloading, I'm using this code to get the avatars: for(int j=0; j<[self.tweets count]; j++){ ImageDownloadDelegate *imgDelegate = [[ImageDownloadDelegate alloc] init]; Tweet *myTweet = [self.tweets objectAtIndex:j]; imgDelegate.tweet = myTweet; imgDelegate.table = timeline; NSURLRequest* request = [NSURLRequest requestWithURL:[NSURL URLWithString:myTweet.imageURL] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60]; imgConnection = [[NSURLConnection alloc] initWithRequest:request delegate:imgDelegate]; [imgDelegate release]; } So basically a new instance of the delegate class is created for each image that needs to be downloaded. Is this the best way to go about this? But then there's no way to figure out which image is associate with which tweet, correct? The algorithm works fine... I'm just wondering if I'm going about it the most efficient way.

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  • How do I switch between Navigation Controllers?

    - by RexOnRoids
    Situation: I have an Xcode project based on the "Navigation-Based-Application" template. So that means I have a SINGLE UINavigationController that manages a UIViewController. What I want To Do: What I want to do is add one more UINavigationController to my project -- and be able to switch back and forth between them. (I want to do this to make space for some seperate unrelated content so that it does not have a back button pointing back to the root view controller.) Question: How do I add one more UINavigationController to my project and switch between the two UINavigationControllers?

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